CAJ | 학술논문

协作多点技术( Coordinated Multiple Points,CoMP)作为LTE-A的最重要候选技术之一,已经得到广泛的关注。在协作多点中,有很多种传输方案,其中一种基于联合传输下的全局预编码方案能够获得极佳的系统性能,而实现该方案的前提是基站可以得到较为完整的信道状态信息。因此在信道反馈时选择显式反馈,因为相比较其他反馈方式,它可以反馈更为完整的信道状态信息,而显式反馈的缺点为需要的反馈量过大。文中利用一种采用压缩感知的信道反馈新方法对联合传输下的全局预编码方案信道显式反馈信息进行压缩,仿真结果显示在不影响系统性能的前提下,能够有效地减少反馈量,使得系统发挥最佳性能。
협작다점기술( Coordinated Multiple Points,CoMP)작위LTE-A적최중요후선기술지일,이경득도엄범적관주。재협작다점중,유흔다충전수방안,기중일충기우연합전수하적전국예편마방안능구획득겁가적계통성능,이실현해방안적전제시기참가이득도교위완정적신도상태신식。인차재신도반궤시선택현식반궤,인위상비교기타반궤방식,타가이반궤경위완정적신도상태신식,이현식반궤적결점위수요적반궤량과대。문중이용일충채용압축감지적신도반궤신방법대연합전수하적전국예편마방안신도현식반궤신식진행압축,방진결과현시재불영향계통성능적전제하,능구유효지감소반궤량,사득계통발휘최가성능。
Coordinated Multi Point ( CoMP) technology has drawn broad attention as one of the most important potential technologies of LTE-A. There are a variety of transmission schemes of CoMP,one of which is the global precoding scheme based on joint transmission can obtain excellent system performance. The realization of the program is based on the fact that the base station can get a more complete channel state information. Therefore,explicit feedback is chosen as the channel feedback method because compared with other feedback ways,the explicit feedback can feed more complete channel state information,but the disadvantage of the program is that it requires exces-sive feedback. In this paper,a novel channel feedback method of compressed sensing is utilized to compress the explicit channel feedback information of global precoding scheme under joint transmission. Simulation results show that on the premise of without affecting system performance,it can effectively reduce the amount of feedback,making the system work optimally.