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空时编码技术通过空间和时间分集接收能有效增加信道容量。多载波直接扩频序列码分多址 (DS- CDMA)技术将一个宽带频率选择性信道划分成多个频率非选择性子载波 ,在子载波上并行发送信号 ,能有效地抑制信道的多径衰落。该文将空时编码技术和多载波通信相结合 ,设计了一种新颖的基于多发射天线的 MC- DS- CDMA方法。与传统的方法相比 ,该方法有效地利用了空间分集技术 ,从而降低数据传输的错误 ,提高信道容量。仿真实验结果表明 ,这种新系统的性能优于传统的 MC- DS- CDMA方法。
The space-time coding technique can effectively increase the channel capacity through space and time diversity reception. Multi-Carrier Direct Spread Spectrum Code Division Multiple Access (DS-CDMA) technology divides a wideband frequency-selective channel into multiple frequency non-selective sub-carriers and transmits signals in parallel on sub-carriers, which can effectively suppress the multipath fading . This paper combines space-time coding with multi-carrier communication, and designs a novel MC-DS-CDMA method based on multiple transmit antennas. Compared with the traditional method, this method effectively utilizes the space diversity technology, thus reduces the data transmission mistake, enhances the channel capacity. The simulation results show that the performance of this new system is superior to the traditional MC-DS-CDMA method.