摘要
针对大容量散射通信系统带宽受限和码间干扰严重的问题,首先比较了多输入多输出系统与传统散射系统的异同,在此基础上提出一套同频发射分集方案,通过简要的理论分析证明采用该方案仍可获取4重分集增益;然后重点探讨了同频发射分集中同步技术与频域均衡技术2项关键技术,并且基于传统散射系统实现该同频发射分集方案;经实测得出结论,同频发射分集系统的误码性能与传统散射系统相当,其帧头开销、保护前缀开销均可满足实际应用要求,可实用于工程,从而节约频谱资源。
Aiming at the problems of bandwidth limitation and severe ISI in high-capacity troposcatter communication system, firstly the differences between MIMO system and conventional troposcatter system are analyzed.Based on the analysis above ,a transmit diversity scheme with same carrier frequency is proposed.The theoretical analysis shows that this scheme can be used to obtain quadruple diversity gain.The frequency domain equalization and synchronization technology of the proposed scheme are discussed.The proposed diversity scheme is realized based on conventional troposcatter system.The measurement results show that the BER performance of this scheme is similar to that of conventional troposeatter system.The overhead of frame head and cyclic prefix can satisfy the requirement of practical implementation, thus saving the frequency resource.
出处
《无线电通信技术》
2015年第3期17-19,82,共4页
Radio Communications Technology
基金
国家部委基金资助项目
关键词
对流层散射通信
大容量散射
同频发射分集
频域均衡
troposcatter communication
high-capacity troposcatter communication
transmit diversity with same carrier frequency
frequency domain equalization
