High-Efficient Implementation of OFDM Demodulation for DRM
Gang Yang · Audio Engineering · 2010
To demodulate OFDM signals of all-mode DRM receivers,a non-power-of-2 FFT mixture of nested WFTA,in-place out-of-order PFA,and radix-2 FFT of variable stream,is proposed.The FFT architecture is simplified by oversampling of 48 kHz.Experimental results show that,multiplexing of memory and radix-2 FFT decreases dramatically the requirement of FPGA hardware resource,and reduces effectively the cost and power consumption of portable DRM receivers.