Data Throughput in a Multi-Rate CDMA Reverse Link: Comparing Optimal Spatial Combining vs. Maximal Ratio Combining

摘要

The Reverse Link (mobile to base station) average data rate carrying capacity of a CDMA communications system is analyzed comparing different antenna array spatial combining algorithms: Optimum Combining (OC) versus Maximal Ratio Combining (MRC) in a multi-user system employing multi-rate traffic (combined voice and data users) over Rayleigh faded channels. Typical CDMA power and interference relationships for an embedded multi-cell CDMA Reverse Link are discussed in the context of spatial OC algorithms and related to the total Reverse Link data throughput. Other-cell interference and chosen system rise-overthermal metrics are found to limit the possible gain increase using OC vs. MRC.