DF中继点结合CRC校验的差分酉空时调制方法  

A Differential Unitary Space-time Modulation Scheme Combined with CRC Checksum for DF Relay Point

作　　者：元洪波 党刚[2] 王忠勇[2] 

机构地区：[1]空军第一航空学院航空电子工程系,河南信阳464001 [2]郑州大学信息工程学院,郑州450001

出　　处：《河南师范大学学报（自然科学版）》2013年第5期166-169,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(61172086)

摘　　要：针对航空通信中基于差分酉空时调制的解码转发方案的译码错误问题,提出在中继点采用循环冗余编码(CRC)提高系统可靠性的方法.该方法在源节点和目的节点均配置多根天线,接收端使用最大化合并的方案以抵抗多径干扰,利用CRC提高误码性能,保证通信质量.仿真结果表明,在低速率数据传输的快衰落信道中,该方法有明显的编码增益.在BER为10-5处,有循环冗余编码的差分酉空时调制比无循环冗余编码的差分酉空时调制增加约4dB的编码增益.According to the decoding error of aeronautical communications combined with decode-and-forward collabora tion technology, this paper proposed a method to improve the reliability of cooperation schemes based on Differential Unitary Space-Time Modulation by applying the Cyclic Redundancy Check at the relay. Multiple antennas are set at the transmitting end and receiving end （source and destination nodes）. The maximum ratio combining scheme is applied at the receiving end （desti- nation node）. The method resisted multipath interference, improve error performance and guarantee communication quality. Simulation results indicate our method show evident coding gain in the frequency selective fading channel with low transmission rates. When BER= 10 -5, the proposed scheme has a 4dB coding gain compared with the scheme without CRC.

关 键 词：航空通信 解码转发 循环冗余编码 差分酉空时调制 

分 类 号：TN911[电子电信—通信与信息系统]