Interchannel Interference in Walsh Multiplex Systems

Interchannel interference in multiplexing systems using Walsh-function carriers is considered. In such systems excessive sequency bandwidth of input signals or synchronization errors destroy orthogonality between received signals and demodulating functions, causing crosstalk. The former cause is studied using Yuen\´s integration-by-parts method, while for the latter correlation of Walsh functions is derived. For both causes crosstalk is small ff a "weighted distance" between the indices of the two channels is large.