AnsweredAssumed Answered

AD9361 RX FIR number of taps

Question asked by dinc@coherentlogix.com on Oct 9, 2014
Latest reply on Oct 9, 2014 by tlili

Hi,

My RX path clock speeds are as below for LTE 10 MHz configuration:

983040000 (BBPLL), 245760000 (ADC_CLK, RHB3), 122880000(RHB2 CLK), 61440000 (RHB1 CLK), 30720000 (RX FIR CLK), 15360000 (RX Sampling rate)

1. Can you please confirm is the below formula correct for RX FIR number of taps calculation?

#of taps = 32 x (ADC_CLK) / (2 x RX FIR CLK)) = 32 x 245.76 / (2 x 30.72) = 128

2. Does this mean 128 taps FIR for each RX channel  is available in case of a MIMO  / 2RX scenario or has to be divided by 2, as 64 taps for each channel?


Thank you,

Regards,

Asli


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