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Multi channel FFT in FPGA

Hi, 

I want to apply 2048 point FFT parallely on 8 AI channels which are sampled at 200KS/s. (Outside SCTL)

 

I was trying this by calling 8 FFT functions paralley (each configured for 2048 block size). But this fails compilation due to resource over utilization(particularly DSP48s).

I found one IP here , to use same FFT for multiple channels. But it is given for using inside SCTL. Can anybody suggest how can I implement it outside SCTL?

Is there any other efficient way for multi-ch FFT?

 

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Can someone help?

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