SIR-BASED TRANSMIT POWER-CONTROL OF REVERSE LINK FOR COHERENT DS-CDMAMOBILE RADIO

This paper proposes a measurement scheme of instantaneous signal-to-av erage interference plus background noise ratio (SIR) for SIR-based fas t transmit power control (TPC) using time-multiplexed pilot symbols on the reverse link of DS-CDMA mobile radio. Both pilot and data are use d for signal power measurement, but pilot symbols are used for measure ment of average interference plus noise power. By the means of compute r simulation: the TPC parameters, i.e., SIR measurement period and ste p size, are optimized to maximize the link capacity in a Rayleigh fadi ng environment. The capacity of the power controlled reverse link with channel coding and Rake combining is evaluated to understand the effe cts of the number of resolvable propagation paths, fading maximum Dopp ler frequency(or mobile traveling speed), and antenna diversity recept ion in single-cell and multi-cell environments.