计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2014年
5期
86-88
,共3页
多输入多输出%多址接入信道%共道干扰%有限反馈%最大似然%复杂度
多輸入多輸齣%多阯接入信道%共道榦擾%有限反饋%最大似然%複雜度
다수입다수출%다지접입신도%공도간우%유한반궤%최대사연%복잡도
Multi-Input Multi-Output(MIMO)%Multiple Access Channel(MAC)%co-channel interference%limited feedback%Maximum Likelihood(ML)%complexity
针对两用户的多输入多输出多址接入信道(MIMO-MAC)中存在共道干扰的问题，提出一种基于有限反馈的干扰消除方法，每个用户根据反馈信息对将要发送的信号进行对角化处理。通过合理设计预处理矩阵，对接收信号进行线性处理以消除共道干扰，从而提高系统的可靠性，使得接收端可以逐个符号地最大似然译码，降低译码复杂度。仿真结果表明，若接收端配置2根天线且系统采用4QAM调制，则当误比特率为10-3时，与已有基于有限反馈的干扰消除方案相比，该方案能获得2 dB的增益。
針對兩用戶的多輸入多輸齣多阯接入信道(MIMO-MAC)中存在共道榦擾的問題，提齣一種基于有限反饋的榦擾消除方法，每箇用戶根據反饋信息對將要髮送的信號進行對角化處理。通過閤理設計預處理矩陣，對接收信號進行線性處理以消除共道榦擾，從而提高繫統的可靠性，使得接收耑可以逐箇符號地最大似然譯碼，降低譯碼複雜度。倣真結果錶明，若接收耑配置2根天線且繫統採用4QAM調製，則噹誤比特率為10-3時，與已有基于有限反饋的榦擾消除方案相比，該方案能穫得2 dB的增益。
침대량용호적다수입다수출다지접입신도(MIMO-MAC)중존재공도간우적문제，제출일충기우유한반궤적간우소제방법，매개용호근거반궤신식대장요발송적신호진행대각화처리。통과합리설계예처리구진，대접수신호진행선성처리이소제공도간우，종이제고계통적가고성，사득접수단가이축개부호지최대사연역마，강저역마복잡도。방진결과표명，약접수단배치2근천선차계통채용4QAM조제，칙당오비특솔위10-3시，여이유기우유한반궤적간우소제방안상비，해방안능획득2 dB적증익。
For the problem of co-channel interference over Multi-Input Multi-Output(MIMO) Multiple Access Channels(MAC) for two-user, an interference cancellation scheme is proposed, in which the transmitted signals are diagonalization processed according to feedback information. Through proper design of pretreatment matrices, the co-channel interference is eliminated after the linear processing of received signals. Not only the reliability is improved, but also each signal can be Maximum Likelihood(ML) decoded separately. Simulation results show that, with two antennas at the receiver and 4QAM adopted, the gain of the proposed scheme is 2 dB at the Bit Error Rate(BER) of 10-3 compared with the existing interference cancellation scheme.
