Title :
General techniques for analyzing DS/SSMA interference illustrated by evaluating a noncoherent system
Author :
McDowell, Anthony T. ; Lehnert, James S.
Author_Institution :
Hughes Defense Commun., Fort Wayne, IN, USA
fDate :
12/1/1996 12:00:00 AM
Abstract :
A conditional probability density function of the multiple-access interference (MAI) in direct-sequence spread-spectrum multiple access (DS/SSMA) systems with complex modulation (e.g., M-ary and continuous phase) is derived from a geometric viewpoint. A method to efficiently calculate the two-dimensional (2-D) convolutions of a number of circularly symmetric densities is presented. The utility of these methods is then illustrated by evaluating a noncoherent DS/SSMA system
Keywords :
convolution; multi-access systems; pseudonoise codes; radiofrequency interference; spread spectrum communication; 2D convolution; DS/SSMA interference; circularly symmetric densities; complex modulation; conditional probability density function; direct-sequence spread-spectrum multiple access; multiple-access interference; noncoherent system evaluation; two-dimensional convolution; Convolution; Delay effects; Multiple access interference; Probability density function; Random variables; Signal processing; Spread spectrum communication; Statistics; Transmitters; Two dimensional displays;
Journal_Title :
Communications, IEEE Transactions on
