Efficient non-uniform channelization for SDR using frequency domain filtering

An arbitrary sampling rate conversion algorithm based on frequency domain filtering (FDF-ASRC) is proposed. The number of Fourier coefficients in FDF-ASRC is irrelevant to the symbol rate of interested signal. Applying the resampling algorithm to non-uniform channelization, a few modules of Fourier transform (FT) and inverse Fourier transform (IFT) can guarantee infinite channels in channelization. Meanwhile, the sampling rate of output signal can be adjusted to an integer multiple of symbol rate, which can be passed to demodulator directly. By comparison with seven architectures of non-uniform channelizers, the computational complexity of the proposed channelizers is equal to the best.