PERFORMANCE ANALYSIS OF CDMA WITH IMPERFECT POWER-CONTROL

The standard correlation receiver for code-division multiple access (C DMA) systems is susceptible to the near-far problem, Power control tec hniques attempt to overcome near-far effects by varying transmitted po wer levels to ensure that all signals are received with equal power le vels. Since these algorithms cannot perfectly compensate for power flu ctuations in a mobile communications channel, the capacity of the syst em is reduced for a given bit-error rate (BER). This paper examines th e performance of a CDMA system using imperfect power control by extend ing analytical techniques that account for multiple access interferenc e. Single cell capacity is compared with systems employing perfect pow er control.