How to config DPD on AD9375?

sonminh

on Apr 22, 2020

Hi,

I use default DPDconfig to configure DPD on my custom board:

static mykonosDpdConfig_t dpdConfig =
{
    10,              /* 1/2^(damping + 8) fraction of power `forgotten' per sample (default: `1/8192' = 5, valid 0 to 15), 0 = infinite damping*/
    1,              /* number of weights to use for int8_cpx weights weights member of this structure (default = 1)*/
    2,              /* DPD model version: one of four different generalized polynomial models: 0 = same as R0 silicon, 1-3 are new and the best one depends on the PA (default: 2)*/
    1,              /* 1 = Update saved model whenever peak Tx digital RMS is within 1dB of historical peak Tx RMS*/
    20,             /* Determines how much weight the loaded prior model has on DPD modeling (Valid 0 - 32, default 20)*/
    0,              /* Default off = 0, 1=enables automatic outlier removal during DPD modeling */
    512,            /* Number of samples to capture (default: 512, valid 64-32768)*/
    4096,           /* threshold for sample in AM-AM plot outside of 1:1 line to be thrown out. (default: 50% = 8192/2, valid 8192 to 1)*/
    0,              /* 16th of an ORx sample (16=1sample), (default 0, valid -64 to 64)*/
    255,            /* Default 255 (-30dBFs=(20Log10(value/8192)), (valid range 1 to 8191)*/
    {{64,0},{0,0},{0,0}}/* DPD model error weighting (real/imag valid from -128 to 127)*/
};

My system have multi mode BPSK, QPSK, QUAM16,QUAM64 with bandwidth 5MHz, 10MHz, 20Mhz.

I have feedback Tx2 signal into ORX2 with power -24dbm and configure dpd follow ug992. But i don't see any different between have setup DPD and no have DPD.

Here is status that I read using MYKONOS_getDpdStatus:

dpdStatus.dpdErrorStatus = 0,

dpdStatus.dpdExtPathDelay = 0x73B ,

dpdStatus.dpdIterCount = 0,

dpdStatus.dpdMaxAdaptation = 0,

dpdStatus.dpdModelErrorPercent = 1000,

dpdStatus.dpdTrackCount = 0

Can you suggest for me how to solve? Thanks. This is my output from tx:

dpdStatus.dpdErrorStatus = 0, dpdStatus.dpdExtPathDelay = 0x73B , dpdStatus.dpdIterCount = 0, dpdStatus.dpdMaxAdaptation = 0, dpdStatus.dpdModelErrorPercent = 1000, dpdStatus.dpdTrackCount = 0
[edited by: sonminh at 2:00 AM (GMT 0) on 24 Apr 2020]

0 srimoyi

on Apr 23, 2020 6:40 AM
Donot post duplicate threads. Will be followed here:

https://ez.analog.com/microcontroller-no-os-drivers/f/q-a/164495/how-to-config-dpd-on-ad9375
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0 sonminh
on Apr 23, 2020 9:49 PM in reply to srimoyi
HI srimoyi,

I have mistake once post this question in to that forum, then I received this answer:

"Moving to No-Os forum for comments on the DPD configuration"

Because I don't know delete that question, I have post again in this forum.

Thanks
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0 PVALAVAN

on Apr 24, 2020 1:02 AM in reply to sonminh
Can you please share your complete configuration file? Are you using a profile that supports DPD?

Please check that you are enabling the DPD init and tracking calibration.

Please make sure that you are enabling the required DPD parameters.

typedef struct
{
mykonosDacDiv_t dacDiv; /*!< The divider used to generate the DAC clock (ENUM Values)*/
mykonosFir_t *txFir; /*!< Pointer to Tx FIR filter structure */
uint8_t txFirInterpolation; /*!< The TX digital FIR filter interpolation (1,2,4) */
uint8_t thb1Interpolation; /*!< Tx Halfband1 (HB1) filter interpolation (1,2) */
uint8_t thb2Interpolation; /*!< Tx Halfband2 (HB2) filter interpolation (1,2) */
uint8_t txInputHbInterpolation; /*!< Interpolation of half band filter before the programmable FIR (valid 1,2,4) */
uint32_t iqRate_kHz; /*!< Tx IQ data rate in kHz */
uint32_t primarySigBandwidth_Hz; /*!< Tx primary signal BW */
uint32_t rfBandwidth_Hz; /*!< Tx RF passband bandwidth for the profile */
uint32_t txDac3dBCorner_kHz; /*!< DAC filter 3dB corner in kHz */
uint32_t txBbf3dBCorner_kHz; /*!< Tx BBF 3dB corner in kHz */
uint8_t enableDpdDataPath; /*!< Enable Tx Dynamic pre distortion - only valid for a DPD-enabled transceiver */
} mykonosTxProfile_t;
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0 sonminh

on Apr 27, 2020 12:24 AM in reply to PVALAVAN

Hi PVALAVAN,

Thanks for your help, I had configure DPD done . But the result of using DPD in different frequency is different. Here is result once use DPD:

In 4,5G:

In 4.6G:

In 4.8G:

Here is dpd config:

static mykonosDpdConfig_t dpdConfig =

    5,              /* 1/2^(damping + 8) fraction of power `forgotten' per sample (default: `1/8192' = 5, valid 0 to 15), 0 = infinite damping*/
   1,              /* number of weights to use for int8_cpx weights weights member of this structure (default = 1)*/
   2,              /* DPD model version: one of four different generalized polynomial models: 0 = same as R0 silicon, 1-3 are new and the best one depends on the PA (default: 2)*/
   1,              /* 1 = Update saved model whenever peak Tx digital RMS is within 1dB of historical peak Tx RMS*/
   20,             /* Determines how much weight the loaded prior model has on DPD modeling (Valid 0 - 32, default 20)*/
   0,              /* Default off = 0, 1=enables automatic outlier removal during DPD modeling */
   16384,            /* Number of samples to capture (default: 512, valid 64-32768)*/
   4096,           /* threshold for sample in AM-AM plot outside of 1:1 line to be thrown out. (default: 50% = 8192/2, valid 8192 to 1)*/
   0,              /* 16th of an ORx sample (16=1sample), (default 0, valid -64 to 64)*/
   255,            /* Default 255 (-30dBFs=(20Log10(value/8192)), (valid range 1 to 8191)*/
   {{64,0},{0,0},{0,0}}/* DPD model error weighting (real/imag valid from -128 to 127)*/

static mykonosObsRxSettings_t obsRxSettings =
{
    &orxProfile,    /* ORx datapath profile, 3dB corner frequencies, and digital filter enables*/
    &orxGainControl,/* ObsRx gain control settings structure*/
    &obsRxAgcConfig,/* ORx AGC control settings structure*/
    &snifferProfile,/* Sniffer datapath profile, 3dB corner frequencies, and digital filter enables*/
    &snifferGainControl,/* SnRx gain control settings structure*/
    &obsRxFramer,   /* ObsRx JESD204b framer configuration structure */
   MYK_ORX2,
//    (MYK_ORX1_ORX2 | MYK_SNRXA_B_C),/* obsRxChannel */
    OBSLO_TX_PLL,   /* (obsRxLoSource) The Obs Rx mixer can use the Tx Synth(TX_PLL) or Sniffer Synth (SNIFFER_PLL) */
   4467000000U,     /* SnRx PLL LO frequency in Hz */
    0,              /* Flag to choose if complex baseband or real IF data are selected for Rx and ObsRx paths. Where if > 0 = real IF data, '0' = complex data*/
    NULL,           /* Custom Loopback ADC profile to set the bandwidth of the ADC response */
    OBS_RXOFF       /* Default ObsRx channel to enter when radioOn called */
};

And here is section that configure DPD:

Fullscreen dpd_configure.txt Download

	ad9528Device_t 		*clockAD9528_device = &clockAD9528_;
	mykonosDpdStatus_t  dpdStatus;
	mykonosErr_t		mykError;
	const char			*errorString;
	uint8_t				pllLockStatus;
	uint8_t				mcsStatus;
	uint8_t				arm_major;
	uint8_t				arm_minor;
	uint8_t				arm_release;
	mykonosGpioErr_t	mykGpioErr;
	uint32_t			initCalMask = TX_BB_FILTER | ADC_TUNER | TIA_3DB_CORNER | DC_OFFSET |
									  TX_ATTENUATION_DELAY | RX_GAIN_DELAY | FLASH_CAL |
									  PATH_DELAY | TX_LO_LEAKAGE_INTERNAL | TX_QEC_INIT |
									  LOOPBACK_RX_LO_DELAY | LOOPBACK_RX_RX_QEC_INIT |
									  RX_LO_DELAY | RX_QEC_INIT ;


	uint8_t				errorFlag = 0;
	uint8_t				errorCode = 0;
	uint32_t			initCalsCompleted;
	uint8_t				framerStatus;
	uint8_t				obsFramerStatus;
	uint8_t				deframerStatus;
	uint32_t			trackingCalMask = TRACK_ORX1_QEC | TRACK_ORX2_QEC | TRACK_RX1_QEC |
										  TRACK_RX2_QEC | TRACK_TX1_QEC | TRACK_TX2_QEC | TRACK_TX1_LOL | TRACK_TX2_LOL;

	/* Allocating memory for the errorString */
	errorString = (const char*) malloc(sizeof(char) * 200);

	/*************************************************************************/
	/*****                Mykonos Initialization Sequence                *****/
	/*************************************************************************/
	mykDevice.tx->txChannels = u8TxID;
	mykDevice.rx->rxChannels = u8RxID;

	/* Perform a hard reset on the MYKONOS DUT (Toggle RESETB pin on device) */
	if ((mykError = MYKONOS_resetDevice(&mykDevice)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_initialize(&mykDevice)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	/*************************************************************************/
	/*****                Mykonos CLKPLL Status Check                    *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_checkPllsLockStatus(&mykDevice, &pllLockStatus)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	/*************************************************************************/
	/*****                Mykonos Perform MultiChip Sync                 *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_enableMultichipSync(&mykDevice, 1, &mcsStatus)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	/* Minimum 3 SYSREF pulses from Clock Device has to be produced for MulticChip Sync */
	AD9528_requestSysref(clockAD9528_device, 1);
	mdelay(1);
	AD9528_requestSysref(clockAD9528_device, 1);
	mdelay(1);
	AD9528_requestSysref(clockAD9528_device, 1);
	mdelay(1);
	AD9528_requestSysref(clockAD9528_device, 1);
	mdelay(1);

	/*************************************************************************/
	/*****                Mykonos Verify MultiChip Sync                 *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_enableMultichipSync(&mykDevice, 0, &mcsStatus)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mcsStatus & 0x0B) == 0x0B)
		xil_printf("\r\nMCS successful");
	else
		xil_printf("\r\nMCS failed\n");

	/*************************************************************************/
	/*****                Mykonos Load ARM file                          *****/
	/*************************************************************************/

	if (pllLockStatus & 0x01) {
		xil_printf("\r\nCLKPLL locked");
		if ((mykError = MYKONOS_initArm(&mykDevice)) != MYKONOS_ERR_OK) {
			errorString = getMykonosErrorMessage(mykError);
//			goto error;
		}

		if ((mykError = MYKONOS_loadArmFromBinary(&mykDevice, &firmware_Mykonos_M3_bin[0], firmware_Mykonos_M3_bin_len)) != MYKONOS_ERR_OK) {
			errorString = getMykonosErrorMessage(mykError);
//			goto error;
		}
	} else {
		xil_printf("\r\nCLKPLL not locked (0x%x)", pllLockStatus);
		return;
	}

//	/* Read back the version of the ARM binary loaded into the Mykonos ARM memory */
//	if ((mykError = MYKONOS_getArmVersion(&mykDevice, &arm_major, &arm_minor, &arm_release, NULL)) == MYKONOS_ERR_OK)
//		xil_printf("\r\nAD9371 ARM version %d.%d.%d", arm_major, arm_minor, arm_release);

	/*************************************************************************/
	/*****                Mykonos Set RF PLL Frequencies                 *****/
	/*************************************************************************/
	xil_printf("\r\nmykDevice.rx->rxPllLoFrequency_Hz = %ld", mykDevice.rx->rxPllLoFrequency_Hz);
//	getchar();
	if ((mykError = MYKONOS_setRfPllFrequency(&mykDevice, RX_PLL, mykDevice.rx->rxPllLoFrequency_Hz)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}
	xil_printf("\r\nmykDevice.tx->txPllLoFrequency_Hz = %ld", mykDevice.tx->txPllLoFrequency_Hz);
//	getchar();
	if ((mykError = MYKONOS_setRfPllFrequency(&mykDevice, TX_PLL, mykDevice.tx->txPllLoFrequency_Hz)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}
	xil_printf("\r\nmykDevice.obsRx->snifferPllLoFrequency_Hz = %ld", mykDevice.obsRx->snifferPllLoFrequency_Hz);
//	getchar();
	if ((mykError = MYKONOS_setRfPllFrequency(&mykDevice, SNIFFER_PLL, mykDevice.obsRx->snifferPllLoFrequency_Hz)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	sleep(1);

	if ((mykError = MYKONOS_checkPllsLockStatus(&mykDevice, &pllLockStatus)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
	}

	if ((pllLockStatus & 0x0F) == 0x0F)
		xil_printf("\r\nPLLs locked");
	else {
		xil_printf("\r\nPLLs not locked (0x%x)", pllLockStatus);
		return;
	}

#if DPD_ENABLE

	mykError = MYKONOS_configDpd(&mykDevice);
	if (mykError != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error_11;
	}

	mykError = MYKONOS_configClgc(&mykDevice);
	if (mykError != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error_11;
	}

	mykError = MYKONOS_configVswr(&mykDevice);
	if (mykError != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error_11;
	}

#endif

	/*************************************************************************/
	/*****                Mykonos Set GPIOs                              *****/
	/*************************************************************************/

	if ((mykGpioErr = MYKONOS_setRx1GainCtrlPin(&mykDevice, 0, 0, 0, 0, 0)) != MYKONOS_ERR_GPIO_OK) {
		errorString = getGpioMykonosErrorMessage(mykGpioErr);
//		goto error;
	}

	if ((mykGpioErr = MYKONOS_setRx2GainCtrlPin(&mykDevice, 0, 0, 0, 0, 0)) != MYKONOS_ERR_GPIO_OK) {
		errorString = getGpioMykonosErrorMessage(mykGpioErr);
//		goto error;
	}
//	xil_printf("\r\n setTx2AttenCtrlPin");
//	getchar();
	if ((mykGpioErr = MYKONOS_setTx1AttenCtrlPin(&mykDevice, 0, 0, 0, 0, 0)) != MYKONOS_ERR_GPIO_OK) {
		errorString = getGpioMykonosErrorMessage(mykGpioErr);
//		goto error;
	}
//	xil_printf("\r\n setTx2AttenCtrlPin");
//	getchar();
	if ((mykGpioErr = MYKONOS_setTx2AttenCtrlPin(&mykDevice, 0, 0, 0, 0)) != MYKONOS_ERR_GPIO_OK) {
		errorString = getGpioMykonosErrorMessage(mykGpioErr);
//		goto error;
	}
//	xil_printf("\r\n setupGpio");
//	getchar();
	if ((mykGpioErr = MYKONOS_setupGpio(&mykDevice)) != MYKONOS_ERR_GPIO_OK) {
		errorString = getGpioMykonosErrorMessage(mykGpioErr);
//		goto error;
	}

	/*************************************************************************/
	/*****                Mykonos Set manual gains values                *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_setRx1ManualGain(&mykDevice, 255)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_setRx2ManualGain(&mykDevice, 255)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_setObsRxManualGain(&mykDevice, OBS_RX1_TXLO, 255)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_setObsRxManualGain(&mykDevice, OBS_RX2_TXLO, 255)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_setObsRxManualGain(&mykDevice, OBS_SNIFFER_A, 255)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_setObsRxManualGain(&mykDevice, OBS_SNIFFER_B, 255)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_setObsRxManualGain(&mykDevice, OBS_SNIFFER_C, 255)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	/*************************************************************************/
	/*****                Mykonos Initialize attenuations                *****/
	/*************************************************************************/
//	xil_printf("\r\n setTx1Attenuation");
//	getchar();
	if ((mykError = MYKONOS_setTx1Attenuation(&mykDevice, 0)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}
//	xil_printf("\r\n setTx2Attenuation");
//	getchar();
	if ((mykError = MYKONOS_setTx2Attenuation(&mykDevice, 0)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	/*************************************************************************/
	/*****           Mykonos ARM Initialization Calibrations             *****/
	/*************************************************************************/

    if ((mykError = MYKONOS_runInitCals(&mykDevice, (initCalMask & ~TX_LO_LEAKAGE_EXTERNAL))) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_waitInitCals(&mykDevice, 60000, &errorFlag, &errorCode)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((errorFlag != 0) || (errorCode != 0)) {
		/*** < Info: abort init cals > ***/
		if ((mykError = MYKONOS_abortInitCals(&mykDevice, &initCalsCompleted)) != MYKONOS_ERR_OK) {
			errorString = getMykonosErrorMessage(mykError);
//			goto error;
		}
		if (initCalsCompleted)
			xil_printf("\r\nCompleted calibrations: %x", (unsigned int)initCalsCompleted);
	}
	else
		xil_printf("\r\nCalibrations completed successfully\n");

	/*************************************************************************/
	/*****  Mykonos ARM Initialization External LOL Calibrations with PA *****/
	/*************************************************************************/

	/* Please ensure PA is enabled operational at this time */
	if (initCalMask & TX_LO_LEAKAGE_EXTERNAL) {
		if ((mykError = MYKONOS_runInitCals(&mykDevice, TX_LO_LEAKAGE_EXTERNAL)) != MYKONOS_ERR_OK) {
			errorString = getMykonosErrorMessage(mykError);
//			goto error;
		}

		if ((mykError = MYKONOS_waitInitCals(&mykDevice, 60000, &errorFlag, &errorCode)) != MYKONOS_ERR_OK) {
			errorString = getMykonosErrorMessage(mykError);
//			goto error;
		}

		if ((errorFlag != 0) || (errorCode != 0)) {
			/*** < Info: abort init cals > ***/
			if ((mykError = MYKONOS_abortInitCals(&mykDevice, &initCalsCompleted)) != MYKONOS_ERR_OK) {
				errorString = getMykonosErrorMessage(mykError);
//				goto error;
			}
		} else
			xil_printf("External LOL Calibrations completed successfully\n");
	}

	/*************************************************************************/
	/*****             SYSTEM JESD bring up procedure                    *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_enableSysrefToRxFramer(&mykDevice, 1)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}
	/*** < Info: Mykonos is waiting for sysref in order to start
	 * transmitting CGS from the RxFramer> ***/

	if ((mykError = MYKONOS_enableSysrefToObsRxFramer(&mykDevice, 1)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}
	/*** < Info: Mykonos is waiting for sysref in order to start
	 * transmitting CGS from the ObsRxFramer> ***/

	if ((mykError = MYKONOS_enableSysrefToDeframer(&mykDevice, 0)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	if ((mykError = MYKONOS_resetDeframer(&mykDevice)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}


	if ((mykError = MYKONOS_enableSysrefToDeframer(&mykDevice, 1)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	/*************************************************************************/
	/*****            Enable SYSREF to Mykonos and BBIC                  *****/
	/*************************************************************************/

	/* Request a SYSREF from the AD9528 */
	AD9528_requestSysref(clockAD9528_device, 1);
	mdelay(1);

	/*** < Info: Mykonos is actively transmitting CGS from the RxFramer> ***/

	/*** < Info: Mykonos is actively transmitting CGS from the ObsRxFramer> ***/

	/* Request two SYSREFs from the AD9528 */
	AD9528_requestSysref(clockAD9528_device, 1);
	mdelay(1);
	AD9528_requestSysref(clockAD9528_device, 1);
	mdelay(5);

	/*************************************************************************/
	/*****               Check Mykonos Framer Status                     *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_readRxFramerStatus(&mykDevice, &framerStatus)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	} else
		if (framerStatus != 0x3E)
			xil_printf("\r\nRxFramerStatus = 0x%x", framerStatus);

	if ((mykError = MYKONOS_readOrxFramerStatus(&mykDevice, &obsFramerStatus)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	} else
		if (obsFramerStatus != 0x3E)
			xil_printf("\r\nOrxFramerStatus = 0x%x", obsFramerStatus);

	/*************************************************************************/
	/*****               Check Mykonos Deframer Status                   *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_readDeframerStatus(&mykDevice, &deframerStatus)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	} else
		if (deframerStatus != 0x68)
			xil_printf("\r\nDeframerStatus = 0x%x", deframerStatus);

	/*************************************************************************/
	/*****           Mykonos enable tracking calibrations                *****/
	/*************************************************************************/

	if ((mykError = MYKONOS_enableTrackingCals(&mykDevice, trackingCalMask)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	/*** < Info: Allow Rx1/2 QEC tracking and Tx1/2 QEC tracking to run when in the radioOn state
	     *  Tx calibrations will only run if radioOn and the obsRx path is set to OBS_INTERNAL_CALS > ***/

	/*** < Info: Function to turn radio on, Enables transmitters and receivers
	 * that were setup during MYKONOS_initialize() > ***/
	if ((mykError = MYKONOS_radioOn(&mykDevice)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

#if DPD_ENABLE
	/*************************************************************************/
	/*****            Enable DPD calibrations                            *****/
	/*************************************************************************/
	uint32_t initCalMaskDpd = initCalMask | DPD_INIT | CLGC_INIT | VSWR_INIT;

	if ((mykError = MYKONOS_radioOff(&mykDevice)) != MYKONOS_ERR_OK)
	{
		/*** < Info: errorString will contain log error string in order to debug why radioOn failed > ***/
		//errorString = getMykonosErrorMessage(mykError);
		puts(getMykonosErrorMessage(mykError));

	}
	// Make sure PA is ON
	if((mykError = MYKONOS_abortInitCals(&mykDevice, &initCalsCompleted)) != MYKONOS_ERR_OK)
	{
		/*** < Info: errorString will contain log error string in order to debug why failed > ***/
		//errorString = getMykonosErrorMessage(mykError);
		puts("abortInitCals failed");
		fflush(stdout);
		puts(getMykonosErrorMessage(mykError));
	}

	xil_printf("Mykonos ARM Initialization Calibrations for DPD");

	if ((mykError = MYKONOS_runInitCals(&mykDevice, (initCalMaskDpd & ~TX_LO_LEAKAGE_EXTERNAL))) != MYKONOS_ERR_OK)
	{
		/*** < Info: errorString will contain log error string in order to debug why failed > ***/
		//errorString = getMykonosErrorMessage(mykError);
		puts("MYKONOS_runInitCals");
		fflush(stdout);
		puts(getMykonosErrorMessage(mykError));

	}

	if ((mykError = MYKONOS_waitInitCals(&mykDevice, 60000, &errorFlag, &errorCode)) != MYKONOS_ERR_OK)
	{
		/*** < Info: errorString will contain log error string in order to debug why failed > ***/
		//errorString = getMykonosErrorMessage(mykError);
		puts("MYKONOS_waitInitCals");
		fflush(stdout);
		puts(getMykonosErrorMessage(mykError));
	 }

	if ((mykError = MYKONOS_getEnabledTrackingCals(&mykDevice, &trackingCalMask)) != MYKONOS_ERR_OK)
	{
		/*** < Info: errorString will contain log error string in order to debug why failed > ***/
		//errorString = getMykonosErrorMessage(mykError);
		puts("MYKONOS_getEnabledTrackingCals");
		fflush(stdout);
		puts(getMykonosErrorMessage(mykError));

	}

	trackingCalMask |= TRACK_TX1_DPD | TRACK_TX2_DPD | TRACK_TX1_CLGC | TRACK_TX2_CLGC | TRACK_TX1_VSWR | TRACK_TX2_VSWR;

	if ((mykError = MYKONOS_enableTrackingCals(&mykDevice, trackingCalMask)) != MYKONOS_ERR_OK)
	{
		/*** < Info: errorString will contain log error string in order to debug why enableTrackingCals failed > ***/
		//errorString = getMykonosErrorMessage(mykError);
		puts(getMykonosErrorMessage(mykError));

	}

	if ((mykError = MYKONOS_radioOn(&mykDevice)) != MYKONOS_ERR_OK)
	{
		/*** < Info: errorString will contain log error string in order to debug why radioOn failed > ***/
		//errorString = getMykonosErrorMessage(mykError);
		puts(getMykonosErrorMessage(mykError));

	}

#endif



	/*** < Info: Allow TxQEC to run when User: is not actively using ORx receive path > ***/
	if ((mykError = MYKONOS_setObsRxPathSource(&mykDevice, OBS_RXOFF)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}
	if ((mykError = MYKONOS_setObsRxPathSource(&mykDevice, OBS_INTERNALCALS)) != MYKONOS_ERR_OK) {
		errorString = getMykonosErrorMessage(mykError);
//		goto error;
	}

	xil_printf("\r\nDone");
	{
		uint16_t u16ChannelPw = 100;
		uint16_t powerThreshold = 50;

		MYKONOS_setupPaProtection(&mykDevice, powerThreshold, 5, 5, 1, 1);

		MYKONOS_enablePaProtection(&mykDevice, 1);

		MYKONOS_getDacPower(&mykDevice, TX2, &u16ChannelPw);

		xil_printf("\r\nu16ChannelPw: %d", u16ChannelPw);
	}

    if ((mykError = MYKONOS_getDpdStatus(&mykDevice, mykDevice.tx->txChannels, &dpdStatus)) != MYKONOS_ERR_OK)
    {
    	   puts(getMykonosErrorMessage(mykError));
    }
    else
    {
    	 LREP("\r\nDPDStatus: %d 0x%x 0x%x 0x%x 0x%x 0x%x", dpdStatus.dpdErrorStatus, dpdStatus.dpdExtPathDelay, dpdStatus.dpdIterCount, dpdStatus.dpdMaxAdaptation, dpdStatus.dpdModelErrorPercent, dpdStatus.dpdTrackCount);
    }

	SetTxFreq(mykDevice,  mykDevice.tx->txPllLoFrequency_Hz);
	usleep(100);
	SetRxFreq(mykDevice,  mykDevice.rx->rxPllLoFrequency_Hz);
	usleep(100);

	free((char*)errorString);

Can you suggest to me solution improve DPD run better and result is the same in different frequency? My system operate from 4.4G to 5G

Thanks and brgs.

0 PVALAVAN

on Apr 27, 2020 6:53 AM in reply to sonminh
Can you please share the DPD status for all the frequencies?

Did you verify your PA performance across frequency?

What is the PA you are using?
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0 sonminh
on Apr 27, 2020 10:19 PM in reply to PVALAVAN
Hi PVALAVAN,

Thanks for your help.

I use PA: TGA 2578-CP operate from 2g to 6G.

I just change frequency in runtime and verified DPD status for above frequencies:

In 4.5G:

dpdStatus.dpdErrorStatus = 0,

dpdStatus.dpdExtPathDelay = 0x73E,

dpdStatus.dpdIterCount = 0xB6,

dpdStatus.dpdMaxAdaptation = 0x1F92,

dpdStatus.dpdModelErrorPercent = 0xE,

dpdStatus.dpdTrackCount = 0xB

In 4.6G:

dpdStatus.dpdErrorStatus = 0,

dpdStatus.dpdExtPathDelay = 0x73E,

dpdStatus.dpdIterCount = 0x1B,

dpdStatus.dpdMaxAdaptation = 0xF47,

dpdStatus.dpdModelErrorPercent = 0x11,

dpdStatus.dpdTrackCount = 0x1B

In 4.8G:

dpdStatus.dpdErrorStatus = 9,

dpdStatus.dpdExtPathDelay = 0x73E,

dpdStatus.dpdIterCount = 0x144,

dpdStatus.dpdMaxAdaptation = 0x1F92,

dpdStatus.dpdModelErrorPercent = 0x12E,

dpdStatus.dpdTrackCount = 0x1D

Then I change frequency 4.5G again and read dpd status:

dpdStatus.dpdErrorStatus = 0,

dpdStatus.dpdExtPathDelay = 0x73E,

dpdStatus.dpdIterCount = 0x25D,

dpdStatus.dpdMaxAdaptation = 0x1F92,

dpdStatus.dpdModelErrorPercent = 0x53,

dpdStatus.dpdTrackCount = 0x24

Thanks
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0 Vinod

on Apr 29, 2020 12:17 AM in reply to sonminh
DPD is still working without any errors.

The power levels for the three measurements seems to be different, at 4.6G power is 2 dB higher than 4.5G. For caparison make sure output powers are same.

What is the raw ACLR (without DPD) of PA for same power at frequencies 4,5 G, 4.6G and 4.8G ?
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0 sonminh
on Apr 29, 2020 12:34 AM in reply to Vinod
Thanks Vinod, May be my system don't have CFR block or PAR not the same in user guide:

A peak to average ratio
(PAR) of 7.5 dB to 8.5 dB is typical for a 20 MHz LTE FDD
waveform post CFR. Note that the CFR operations on the test
waveforms are precomputed in the GUI software. A CFR block
is not integrated into the AD9375 transceiver.

Thanks
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0 Vinod

on Apr 29, 2020 12:51 AM in reply to sonminh
Yes the PAR of the signal needs to be between 7.5dB and 8.5dB for best DPD performance.
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0 sonminh
on Apr 29, 2020 2:36 AM in reply to Vinod
Hi Vinod,

I have a question.

have i must calibration DPD again use MYKONOS_runInitCals and MYKONOS_enableTrackingCals every change frequency or only calibration DPD once at Initialize and change any frequency without DPD calibration again?

Thanks
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