Single-modulus RNS implementation of Wigner-Ville time-varying spectral estimations

A modular arithmetic system, called the single modulus quadratic residue number system (SM-QRNS), is used to implement a fast, high-resolution complex multiply intensive spectral estimator based on the discrete Wigner distribution (DWD). The presented SM-QRNS DWD processor is shown to achieve a high real-time bandwidth. The SM-QRNS is shown to increase throughput over a non-QRNS conventional design by 46 to 97%. The increase in SM-QRNS processing speed was greater when the fast Fourier transform modules were radix-4 rather than radix-2. >