Can I configure the AD9361 FIR filter as a RRC filter (Root-raised cosine filter) ? Or it can only work as a low pass filter?
In addition, How the 2/4 times interpolation works in FIR filter？Byinterpolated with zero？
Thank you for your reply!
AD9361 is a wideband RF transceiver and the filters are intended for front-end filtering (Not exactly channel selective). Channel selective filters per-carrier are usually implemented in BBP. However, you can configure AD9361 as a RRC filter for a single carrier application, as long as your filtering requirements are met with the available number of taps (max. 128). The AD9361 filter wizard does not support RRC design!
What is your end application? Is it single carrier WCDMA, or TDSCDMA?
Yes, we are designing a single carrier application.
I design a RRC filter with fdatool in MATLAB and it works!
Thank you for your reply.
Currently,I'm implementing modulate and demodulate QPSK on FPGA of Zedboard and FMCOMMS2,
Can you show me how to configure AD9361 filter as a RRC filter? I dont know how to have coefficients for 128 taps of AD9361 filter in main.c . Could you help me?
Thank you so much,
You can use fdatool in matlab to design a filter, then you can get the coefficients by this tool.(You can search how to use fdatool.)
Then you can type coefficients for 128 taps to configure AD9361 filter in NO-OS API software.
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