Abstract
This paper considers the application of mCSK (m-ary code shift keying) to CDMA systems for mobile and personal communications, and analyzes the performance improvements possible. It is shown that on an AGWN channel a significant coding gain may be obtained. On the CDMA channel this increases the system throughput, but does not increase the number of users possible. Fading channels will have a similar effect as in conventional CDMA and may be dealt with by means of an equalizer. The choice of codes for mCSK is considered. These should have small cross-correlation for operation on a CDMA channel, and small off-center autocorrelation for the dispersive fading channel. The option that is likely to give the best results is to assign different orthogonal codesets to each user, each based on a randomly assigned code.
| Original language | English |
|---|---|
| Pages (from-to) | 63-67 |
| Number of pages | 5 |
| Journal | IEE Conference Publication |
| Issue number | 351 |
| Publication status | Published - 1991 |
| Event | 6th International Conference on Mobile Radio and Personal Communications - London, Engl Duration: 9 Dec 1991 → 11 Dec 1991 |