Direct sequence spread-spectrum multiple access system performance in an indoor milieu characterized by a Rician channel

The performance of a direct-sequence spread-spectrum multiple-access (DS/SS-MA) system operating in an indoor milieu characterized by a Rician fading multipath channel is evaluated. The system uses selection diversity and differential phase shift keying as the modulation. The performance of the system is presented for Rician channels with parameters derived from reported actual channel measurements at data rates of 32, 64, and 144 kb/s. It is found that the performance of these systems can be enhanced by exploiting the frequency diversity characteristic inherent in DS/SS signals. It is shown that the improvement in system performance is greatest when space diversity reception operates in tandem with DS/SS modulation.<>