Convolutional Coding Strategies for Code Division Multiple Access Cellular Communications

This paper investigates the use of non-linear convolutional coding techniques for use in a DS-CDMA cellular communication system. Comparisons are made between various error-correction strategies and the Wiener minimum mean square error receiver filter, implemented with the same bandwidth expansion. The use of Gold codes in conjunction with an orthogonal convolutional encoder is shown to produce comparable performance to conventional convolutional coding for single user environments, and to yield reasonable capacity potential for low numbers of users. Future developments are indicated, including the possible application of this system to multipath channels.