CAJ | 학술논문

针对每个用户均配置四根天线的 X信道，提出了一种新的空时编码传输方案。每个用户采用速率为2的空时分组码(R2-STBC)，首先对编码矩阵进行预编码，然后将预编码后的编码矩阵进行加减组合后分两次发送。通过对接收信号进行加减操作减少相互干扰的编码矩阵的数量，再通过合理地设计预编码以及接收端的线性处理消除多用户干扰。与已有方案相比，所提方案在保持传输效率不变的情况下，不仅极大地减少了反馈信息，而且性能显著优于相同场景中的已有方案。
침대매개용호균배치사근천선적 X신도，제출료일충신적공시편마전수방안。매개용호채용속솔위2적공시분조마(R2-STBC)，수선대편마구진진행예편마，연후장예편마후적편마구진진행가감조합후분량차발송。통과대접수신호진행가감조작감소상호간우적편마구진적수량，재통과합리지설계예편마이급접수단적선성처리소제다용호간우。여이유방안상비，소제방안재보지전수효솔불변적정황하，불부겁대지감소료반궤신식，이차성능현저우우상동장경중적이유방안。
A new space-time coded transmission scheme is proposed for the X channel with four antennas at each user who employs the rate-2 space-time block code.Each codeword is pre-coded,and then the addition and subtraction combinations of each codeword after pre-coding are transmitted separately.The number of interferential coding matrices is reduced through addition and subtraction operations of the received signals,and then the multi-user interference is eliminated by proper pre-coding at the transmitters and linear processing at the receivers.Compared with the existing scheme,the proposed scheme not only greatly reduces the feedback amount,but also significantly improves the system reliability.