基于空频分集的合作通信协议

为了提高无线通信的有效性和可靠性,提出了一种基于空频分集的合作通信协议.它通过联合利用传输频带间的衰落不相关特性和中继链路间的衰落不相关特性,获得更高的分级和复接增益.仿真结果表明: 该协议的分集增益为3, 而复接增益为1, 优于选择中继和附加中继协议.当中断概率低于10-2时,该协议可以获得至少3 dB的信噪比增益.利用频率分集能够有效提高合作通信的性能.     

Performance of Adaptive Subchannel Assignment-Based MIMO/OFDM Systems over Multipath Fading Channels

Introduction Orthogonal frequency division multiplexing (OFDM) is widely regarded as an effective modulation tech- nique for mitigating the effects of inter symbol inter- ference (ISI) in a frequency selective fading channeland for providing reliable high…