OFDM-CDMA及其检测技术

传统的CDMA技术在无线通信方面有着FDMA和TDMA所无法比拟的突出性能，但在抗码间串扰和多址干扰方面存在的问题使其总体性能受到限制。随着DSP技术的发展，采用并行传输的OFDM技术正日趋成熟。本文介绍了一种新的无线通信技术OFDM-CDMA，对其发送和接收系统模型进行了完整的描述并分析了接收机中使用的几种检测技术，在频谱利用率、抗多径和多址干扰等方面，OFDM-CDMA等优于传统的CDMA技术。

Comparison of Different Detection Algorithms for OFDM - CDMA

Multiple access systems based on CDMA have achieved increasing more significations than FDMA and TDMA systems in mobile communication applications. However, the performance of CDMA systems is limited by both multiple access interference and inter-symbol interference (ISI). At the same time, OFDM technology has been more and more mature with the great development of DSP technology. A new OFDM-CDMA technology is introduced in this paper, while the transmitter and receiver models are described and the comparison of different detection algorithms for OFDM-CDMA is analyzed. The result shows that OFDM-CDMA outperforms traditional CDMA technology in terms of spectral efficiency and multiple access interference performance, inter-symbol interference performance.