Parallel Channels for High Rate UTRAN
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The method proposed in this paper uses space–time filtering to support parallel channel transmission as an effort to solve two main limitations facing UMTS Terrestrial Radio Access Network (UTRAN): throughput limitation and capacity limitation at high bit rates. The overall system capacity in the case of a spreading factor of 4 was enhanced by adding four channels, leading to a total physical layer throughput of 6.5 Mbps with a slight reduction in the performance of less than 1 dB for some users, while other users performance remain without any degradation. In another case where a spreading factor 8 was used adding four parallel channels leads to a total throughput of 5.1 Mbps with only 1.5 dB reduction in the performance of some users. Finally in the case of a spreading factor of 16, with a reduction of less than 3 dB in performance, an addition of eight parallel channels leads to a throughput of about 5 Mbps.
KeywordsParallel channels space–time filter UMTS UTRAN WCDMA
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