Uplink Link Capacity of DS-CDMA Packet Mobile Communications with Rake Combining and Transmit Power Control
Zhi Sen Wang, Eisuke Kudoh, Fumiyuki Adachi · IEICE Transactions on Communications · 2003
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. key words: DS-CDMA, packet communication, transmit power control, Rake combining, link capacity, capture effect