Title :
Implementation considerations for an adaptive statistically optimum receiver
Author :
Murphy, James M.
Author_Institution :
Hazeltine Corp., Greenlawn, NY, USA
Abstract :
Addresses issues related to implementation of a receiver based on adaptive noncoherent locally optimum demodulation. The demodulation approach is based on estimation of the actual interference probability density function (PDF) and application of the appropriate nonlinearity to the received signal prior to conventional correlation processing. The performance of this adaptive nonlinear demodulator is theoretically superior to the performance of the conventional linear demodulator for the case of nonGaussian interference. Substantial performance improvement is yielded for the case of spread spectrum waveforms corrupted by constant envelope interference. The effects of implementation related constraints on this theoretical performance improvement are quantified. A hardware configuration is presented along with quantified simulation results for a realistic range of implementation parameters, interference scenarios, and signal time-bandwidth products
Keywords :
adaptive systems; demodulation; demodulators; radio receivers; radiofrequency interference; spread spectrum communication; PDF; adaptive demodulation; adaptive nonlinear demodulator; adaptive statistically optimum receiver; constant envelope interference; correlation processing; hardware configuration; military communications systems; nonGaussian interference; probability density function; simulation results; spread spectrum waveforms; time-bandwidth products; Bandwidth; Constraint theory; Correlators; Demodulation; Gaussian noise; Hardware; Interference constraints; Probability density function; Signal processing; Spread spectrum communication;
Conference_Titel :
Tactical Communications Conference, 1990. Vol.1. Tactical Communications. Challenges of the 1990's, Proceedings of the
Conference_Location :
Fort Wayne, IN
DOI :
10.1109/TCC.1990.177801
