Uplink Link Capacity of DS-CDMA Packet Mobile Communications with Rake Combining and Transmit Power Control

ZhiSen WANG  Eisuke KUDOH  Fumiyuki ADACHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.7   pp.2203-2206
Publication Date: 2003/07/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
Keyword: 
DS-CDMA,  packet communication,  transmit power control,  Rake combining,  link capacity,  capture effect,  

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Summary: 
Without transmit power control (TPC) and Rake combining, the uplink capacity of a direct sequence code division multiple access (DS-CDMA) packet mobile communication system significantly degrades due to the near-far problem and multipath fading. In this letter, assuming a single cell system with an interference-limited channel, the impact of the joint use of Rake combining and TPC on the uplink capacity is evaluated by computer simulation. Slow TPC is found to give a link capacity larger than fast TPC. This is because, with slow TPC, the received signal power variations due to fading remain intact and this results in a larger capture effect.