摘要
为了解决无线通信中的安全保密性问题,针对传统的跳频扩频方案存在的技术实现上的困难和无线频谱资源匮乏的矛盾,对信号能量在空间的分布进行了研究,结果表明:在多天线收发数字无线通信中,各处的信号空谱是不同的,这说明无线通信不仅有频谱资源还有更为丰富的空谱资源。据此,提出一种分布式多天线跳空收发方案——0/1式跳空技术。该技术利用发端跳空图案,通过训练得到收端多天线接收加权跳空图案,从而无需确知收发两端的阵列流型,也无需求解复杂的多径信道,就能得到规整的星座图。仿真实验验证了0/1跳空收发技术方案的优越性和安全保密性。
Since traditional solutions like frequency hopping spread spectrum technique not only are technically difficult to implement but also make the frequency resources shortage even more critical, researches on signal＇s energy distribution over space are conducted to achieve secure wireless communications. The results indicate that space spectrum varies from location to location in multi-antenna transceiver wireless communications systems, which implies that plentiful space spectrum resources rather than frequency spectrum resources can be taken into account in secure wireless communications. Based on this point of view, a distributed multi-antenna space hopping transceiver technique--O/1 space hopping technique is proposed. In correspondence to the space hopping pattern at the transmitter, weights are obtained at the receiver via training, so that a regular constellation can be obtained at the receiver without either to know a prior the array manifold or to solve the sophisticated multichannel. Some simulation results are presented and analyzed to evaluate the performance of the proposed technique.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2013年第1期1-6,42,共7页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(60971113,61172093,61071125,61102081)
国家创新群体科学基金资助项目(60921003)
关键词
无线通信
空谱
跳空技术
多天线
跳频扩频
安全保密性
wireless communications
space spectrum
space hopping technique
multi-antenna
frequency hopping spread spectrum
security
