Performance Analysis of A Greedy Bit Loading Algorithm for MC-CDMA Systems

摘要

A greedy bit and power allocation algorithm is proposed for Multi-carrier CDMA (MC-CDMA) systems, which aims to minimize the transmit power with the constraint of a constant data rate and a target bit error rate (BER). The performance of the algorithm and frequency diversity impact are investigated by computer simulation. According to the simulation results, the proposed algorithm can save a lot of transmit power compared to the conventional MC-CDMA system. And smaller spreading factor without frequency interleaving is preferred for the system to achieve better performance.