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Uplink Link Capacity of DS-CDMA Packet Mobile Communications with Rake Combining and Transmit Power Control
IEICE TRANSACTIONS on Communications
Publication Date: 2003/07/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
DS-CDMA, packet communication, transmit power control, Rake combining, link capacity, capture effect,
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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.