摘要:结合了OFDM和传统CDMA技术的多载波CDMA(MC-CDMA)系统是未来移动通信系统一种很有应用前景的候选方案，相当多的专家学者都在对它进行研究。它继承了OFDM和CDMA技术的优良特性，具有频谱效率高、抗ISI能力强等优点，以及在高速率多媒体数据传输方面有独特的优势，所以被认为是未来4G通信的核心技术。另外，其调制／解调部分可采用离散傅立叶变换，通过数字信号处理(DSP)技术实现，符合向软件无线电发展的趋势，成为近几年研究的热点之一。

本论文将从多个方面逐步深入地对MC-CDMA系统的单用户检测技术进行研究，分析了MC-CDMA建立了其在高斯白噪声信道和多径信道下发射和接收的统一数学模型，介绍MC-CDMA的原理和多载波CDMA技术，移动信道的原理和特点，还有单用户检测的原理与分类，单用户检测技术的原理与优缺点，概括了各种单用户检测技术，对采用单用户检测EGC和MRC的MC-CDMA系统的误码率性能分别进行了分析和仿真。

本论文还将介绍MC-CDMA多用户系统检测技术的发展趋势。

关键词：MC-CDMA，移动信道，单用户检测EGC，单用户检测MRC

Abstract:Combined with the traditional CDMA technology and OFDM Mc-cdma (Mc-cdma) system is the future of mobile communication system a good application prospect of the candidate scheme, quite a number of experts and scholars in all its study. It inherits the OFDM and CDMA technology excellent characteristics, has the spectrum efficiency, strong ability of ISI advantages, such as high rate and the multimedia data transmission is the special advantage, it's considered the future 4 G the core technology of the communication. In addition, the modulation/demodulation part can use discrete Fourier transform, through the digital signal processing (DSP) technology to achieve, to comply with the trend of the development of the software radio, has become one of the hot spot in the research.

This paper will be gradually deeply from several aspects of Mc-cdma system of single user detection technology, this paper analyzes the Mc-cdma established its in gaussian white noise channel and multipath channel transmit and receive under the unity of the mathematical model, this paper introduces the principle and Mc-cdma Mc-cdma technology, mobile channel principle and characteristics, and single user detection principle and the classification, single user testing technology and the principle of the advantages and disadvantages, and summarized the various single user testing technology, to the single user testing EGC and the MRC Mc-cdma system ber performance separately carried on the analysis and simulation.

This paper will introduce Mc-cdma multi-user system testing technology development trend.

Key words: Mc-cdma, mobile channel, single user testing EGC, single user testing MRC