摘要
自适应调制能提高系统的频谱利用率和改善系统的误码率性能。该文提出了一种将自适应调制算法与MC-CDMA技术相结合的方案。采用这种方案的自适应MC-CDMA系统在获得频率分集增益和有效频谱利用率的同时,还能获得很好的误码率性能。文章分析了提出的自适应MC-CDMA系统的性能,并通过仿真结果说明了合并方式和信道环境都将影响自适应调制算法在MC-CDMA中应用的有效性。
Adaptive modulation can improve the system performance with high spectral efficiency. In this paper, a combining scheme of MC-CDMA and adaptive modulation is proposed in order to achieve the frequency diversity and the spectral efficiency without loss of much BER performance. The performance of the MC-CDMA system with adaptive modulation is analyzed. Simulation results also indicate the combining schemes and the channel environment will affect the efficiency of adaptive modulation algorithm in MC-CDMA systems.
出处
《电子与信息学报》
EI
CSCD
北大核心
2005年第6期1005-1008,共4页
Journal of Electronics & Information Technology
基金
国家863计划(2003AA12331004)资助课题
