CAJ | 학술논문

研究表明MIMO系统中接收端SNR是一加权卡方随机变量,其权值为相应信道协方差逆阵的对角元素。为获得传输效率和传输可靠性间的折衷,利用协方差矩阵逆阵的对角元素,提出一种基于最小平均误码率（BER）的混合STBC-VBLAST发射天线选择方案。通过与传统无选择的VBLAST系统和有选择的VBLAST系统的BER和容量分别进行仿真比较,验证了所提混合STBC-VBLAST系统天线选择方案的优越性。
연구표명MIMO계통중접수단SNR시일가권잡방수궤변량,기권치위상응신도협방차역진적대각원소。위획득전수효솔화전수가고성간적절충,이용협방차구진역진적대각원소,제출일충기우최소평균오마솔（BER）적혼합STBC-VBLAST발사천선선택방안。통과여전통무선택적VBLAST계통화유선택적VBLAST계통적BER화용량분별진행방진비교,험증료소제혼합STBC-VBLAST계통천선선택방안적우월성。
A novel transmit antenna selection scheme is proposed based on the criteria of minimum average BER to seek the tradeoff between the data rate and data reliability.Previous research proved that the signal-to-noise ratio of MIMO system is a weighted Chi-squared variable,and the weight of SNR equal to the diagonal entry of the inverted transmit correlation matrix.So this proposal develop the antenna selection scheme utilizes the diagonal elements ofinverse covariance matrix.Compare to the original non-selection VBLAST and selection VBLAST system,simulations show that the proposal provides the best performance between capacity and BER.