No abstract

In this paper, a study into the application of soft handoff in wideband Direct Sequence Multiple Access Communications systems (DS-CDMA) is described. Soft handoff is explained in terms of macroscopic diversity, a form of diversity combining in which signals transmitted via independently fading paths can be combined in order to enhance the overall performance. Results from a series of outdoor propagation studies, specifically designed to investigate the propagation aspects of soft handoff are presented and the future work activities of the project are outlined.

No abstract

The renewed interest in the application of the spread sprectrum technique to mobile mdio systems, both in the U.S. and now within Eurupe thruugh the RACE II and U.K. DTI/SERC LINK programs continues to gather momentum. To this end, an analytical performance model has been developed at Bristol in order to provide a greater insight into the opemtion of this technique, in particular the sensitivity of the bandwidth eficiency of the network to the form of diversity signal processing employed in the mobile tmnsceiver. This theme is continued in this paper with an investigation of the wideband channel characteristics of an urban service area. Results are presented relating the statistics of the R A K E receiver bmnches to the spreading bandwidth employed.

No abstract