Variances of multiple access interferencecode average against data average
Tohru Kohda, Hiroshi Fujisaki · Electronics Letters · 2000
The average interference parameter (AIP) introduced by Pursley in 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-spectruin code sequences are generated by Markov information sources. Pursley's even and odd cross-correlation functions are re-examined.