I am trying to send/receive OFDM signals with the AD9361 but my transmit signal seems to be distorted. (see attached image)
The transmit signal looked fine on our old RTOS system but is distorted when I try the Linux driver implementation I am working on. They both use the same FPGA base to process/generate the IQ data and the initialization parameters are identical. I don't think it's a clock issue because the receive chain works fine.
Any ideas on what could be wrong?
I am running Linaro with kernel version 4.9 and am using the ad9361_linux application from https://github.com/analogdevicesinc/no-OS/tree/master/ad9361 to control the 9361.