摘要
为进一步提高多载波CDMA系统的频带效率与抗干扰能力,提出了一种跳频多址技术结合多载波调制的传输方案,利用跳频技术将部分子载波传输与随机交织引入到多载波传输系统中,给出了系统实现的模型,并对该传输方案的系统带宽和误码性能进行了分析。理论分析与仿真结果表明:与以往的多载波CDMA系统相比,所建议系统的结构简单,性能优异,消除了已有系统中峰均功率比高和远近效应等问题,具有较强的抗多址干扰与窄带干扰的能力,并能有效地抗信道中突发错误的能力。
In order to enhance multicarrier CDMA （MC -CDMA） system spectrum efficiency and anti -interference ability, a transmission scheme based on frequency hopping multiple access combined with multicarrier modulation is proposed. By using of frequency hopping technique, partial subcarriers transmission and random interleave are applied to muhicarrier systems. System model is given. Bandwidth and bit error rate（BER） of the proposed scheme are analyzed. Theoretical analysis and simulation results show that the proposed system has robust ability against multiple access interference, narrow -band interference and burst errors, compared with those conventional MC -CDMA systems, and can eliminate the problem of the high peak -to average power ratio（PAPR） and near -far effect in the conventional MC - CDMA systems.
出处
《电讯技术》
2006年第6期13-17,共5页
Telecommunication Engineering
基金
国家自然科学基金资助项目(60372055)
国家高技术研究发展计划(863计划)项目(2003AA123320)
教育部博士点基金资助项目(20020698024)
关键词
多载波传输
CDMA
正交频分复用
跳频
多址
multicarrier transmission
CDMA （ Code Division Multiple Access）
orthogonal frequency division multiplexing（OFDM）
frequency hopping
multiple access
