Data throughput in a multi-rate CDMA reverse link: comparing optimal spatial combining vs. maximal ratio combining
نویسندگان
چکیده
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-over-thermal metrics arc found to limit the possible gain increase using OC vs. MRC.
منابع مشابه
CDMA reverse link spatial combining gains: optimal vs. MRC in a faded voice-data system having a single dominant high data user
The per user carrier-to-interference ratio (CINR) enhancement in the Reverse Link (mobile to base station) of a CDMA communications system is analyzed using different antenna array spatial combining algorithms: Optimum Combining (OC) versus Maximal Ratio Combining (MRC) in a multi-rate (combined voice and data users) multi-antenna scenario. Many low data voice users and a single dominant high d...
متن کاملIncreasing the CDMA reverse link voice-data capacity using a per rate class interference method with optimal spatial combining
The voice Krlang capacity is analyzed ID a imiliiaotenna combined voice-data CDMA Reverse Link (RL). The influence of two different spatial combining techniques: Optimal Combining (OC) and Maximal Ratio Combining (MRO) on the voice Erlangs is evaluated when a single scheduled High Data Rate (HDR) data channel is shared by users desiring HDR services. The impact of randomly arriving data users o...
متن کاملCapacity Expressions for Power-Controlled Multi-Class DS-CDMA Reverse Link with Antenna Diversity and Rake Combining
A DS-CDMAmobile communication system accommodating multi-class users is considered. The number of supportable users depends on the distributions of data rate and required communication quality among users. Simple expressions for the reverse link capacity with transmit power control, antenna diversity, and rake combining, are derived for a single-cell system and a multi-cell system. key words: D...
متن کاملPerformance of very low rate channel coding in W-CDMA reverse link
This paper investigates the packet error rate (PER) and the throughput performance employing code spreading (CS), in which a very low-rate channel coding is used instead of spreading by the Walsh-Hadamard channelization code, associated with Type-I Hybrid ARQ with packet combing (i.e., Chase combining) in the W-CDMA reverse link. Simulation results elucidate that the required average received s...
متن کاملA simple performance/capacity analysis of multiclass macrodiversity CDMA cellular systems
Multiclass CDMA systems, which support multiple services with various quality of service (QoS) requirements, are studied. The focus is on the reverse link capacity and application of macrodiversity with maximal ratio combining (MMRC), where the signals from each mobile station (MS) are received by multiple base stations (BSs) and coherently combined. A simple analytical solution is first derive...
متن کامل