CAJ | 학술논문

提出了一种降低Alamouti编码的多输入多输出正交频分复用系统峰均比的半盲选择映射方法。为在发送端降低复杂度以及把边信息嵌入到发送数据中，该方法把输入正交频分复用符号序列分割成交织的子块，并对每一子块利用转换向量生成时域备选信号，然后把每一子块对应的备选信号乘以不同的相位旋转因子后相加生成发送备选信号。在接收端，通过联合检测每一子块对应的相位旋转因子得到边信息，从而在不传输边信息的情况下检测出发送数据。分析与仿真结果表明，与已有的半盲选择映射方法相比，文中方法可以达到更好的边信息检测性能以及相近的降峰均比与误比特率性能，并且收发端的复杂度大大降低。
제출료일충강저Alamouti편마적다수입다수출정교빈분복용계통봉균비적반맹선택영사방법。위재발송단강저복잡도이급파변신식감입도발송수거중，해방법파수입정교빈분복용부호서렬분할성교직적자괴，병대매일자괴이용전환향량생성시역비선신호，연후파매일자괴대응적비선신호승이불동적상위선전인자후상가생성발송비선신호。재접수단，통과연합검측매일자괴대응적상위선전인자득도변신식，종이재불전수변신식적정황하검측출발송수거。분석여방진결과표명，여이유적반맹선택영사방법상비，문중방법가이체도경호적변신식검측성능이급상근적강봉균비여오비특솔성능，병차수발단적복잡도대대강저。
A semi‐blind selected mapping ( SLM ) scheme is addressed to reduce the peak‐average‐power ratio( PAPR) of Alamouti coded multiple‐input multiple‐output orthogonal frequency division multiplexing (MIMO‐OFDM ) systems .To enable low computational complexity as well as embedding of the side information into the data symbols at the transmitter , the input OFDM symbol sequence is partitioned into several interleaved subblocks , each of which is transformed into time‐domain candidate signals by using the conversion vectors , and then the candidate signals for each subblock are multiplied with different phase offset factors and added up to obtain the transmitted candidate signals . At the receiver , the side information can be obtained by jointly detecting the phase offset factors of each subblock and the transmitted data can be detected without transmitting the side information . Analysis and simulation show that the proposed scheme can achieve a better side information detection performance and almost the same PAPR reduction and bit error rate( BER) performance with a much lower complexity at both the transmitter and receiver , as compared to the available semi‐blind SLM schemes .