Performance Analysis of FFH/BPSK Receivers with Convolutional Coding and Soft Decision Viterbi Decoding Over Channels with Partial-Band Noise Interference

This is a NAVAL POSTGRADUATE SCHOOL MONTEREY CA report procured by the Pentagon and made available for public release. It has been reproduced in the best form available to the Pentagon. It is not spiral-bound, but rather assembled with Velobinding in a soft, white linen cover. The Storming Media report number is A457703. The abstract provided by the Pentagon follows: An analysis of the performance of a binary phase shift keying (BPSK) communication system employing fast frequency hopped (FFH) spread spectrum modulation under conditions of hostile partial band noise interference is performed in this thesis. The data are assumed to be encoded using convolutional coding and the receivers are assumed to use soft decision Viterbi decoding. The receiver structures to be examined are the conventional FFH/BPSK receiver with diversity the conventional FFH/BPSK receiver with diversity and the assumption of perfect side information and the noise normalized FFH/BPSK combining receiver with diversity. The FFH/BPSK noise normalized receiver with diversity minimizes the effects of hostile partial band noise interference and alleviates the effects of fading. The effect of inaccurate measurement of the noise power present in each hop is also examined and it is found that noise measurement error does not significantly degrade receiver performance. For the conventional FFH/BPSK receiver with perfect side information the effect of a Ricean fading channel is also examined.