Title :
Variances of multiple access interference code average against data average
Author :
Kohda, T. ; Fujisaki, H.
Author_Institution :
Dept. of Comput. Sci. & Commun. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
9/28/2000 12:00:00 AM
Abstract :
The average interference parameter (AIP) introduced by Pursley (1977) has been discussed as a measure of bit error probabilities in asynchronous DS/CDMA systems. It is shown that the AIP is a variance of multiple access interference (MAI) with respect to data symbols, and that a variance of MAI with respect to code symbols gives bit error probabilities if spread-spectrum code sequences are generated by Markov information sources. Pursley´s even and odd cross-correlation functions are reexamined
Keywords :
Markov processes; code division multiple access; digital communication; error statistics; interference (signal); spread spectrum communication; MAI code average; Markov information sources; asynchronous DS/CDMA systems; average interference parameter; bit error probabilities; data average; data symbols; even cross-correlation functions; multiple access interference; odd cross-correlation functions; spread-spectrum code sequences;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20001213
