DS-SS-CDMA uplink performance with imperfect power control and a base station antenna array

This paper concerns itself with the steady-state analysis of an idealized scenario involving multiple directional signal sources transmitting to a central base station (the uplink path). The multiple, independent signal sources reside in a single cell. The only fluctuation in the signal levels is due to lognormally-distributed power control error in the multiple transmitters. The central receiver consists of an array of isotropic sensors, minimum mean-squared error beamforming processors and a bank of conventional detectors. The performance measures are outage probability and effective bit energy to noise spectral density ratio. The goal is to find simple expressions which relate the outage-based capacity to the antenna array parameters and the degree of lognormally-distributed power control error. The analytical results are found to agree closely with those obtained form Monte Carlo simulations