Application-Specific Systems, Architectures and Processors (ASAP), 2011 IEEE International Conference on; 01/2011
ABSTRACT: Complex logarithmic number system (CLNS) uses a log/polar complex representation. We propose CLNS for the 128-point fast Fourier transform (FFT) in orthogonal frequency division multiplexing (OFDM) demodulation. We show the cost and quality of the FFT depends on the CLNS base b. Memory requirements decrease as b increases. Experimentally, when optimized for signal-to-noise ratio (SNR), b>2 results in memory reduction up to 36% compared to b=2. Dependence of the SNR on the input's standard deviation variations is weaker for the CLNS than for fixed-point and decreases as b increases.
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on; 06/2005
Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS’05); 01/2005