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Method of reducing peak-to-average power ratio of space-time block coded MIMO-OFDM by circulation and inversion between antennas
Method of reducing peak-to-average power ratio of space-time block coded MIMO-OFDM by circulation and inversion between antennas
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机译：通过天线之间的循环和反演来降低空时分组编码MIMO-OFDM的峰均功率比的方法
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摘要
A signal scrambling method is provided for peak-to-average power ratio (PAPR) reduction of STBC MIMO-OFDM signals in a MIMO-OFDM system having Y transmit antenna. In general terms the OFDM sequence of symbols in said signal for each transmit antenna is divided into M sub-blocks of equal size and subclockwise rotation and inversions are performed across all transmit antennas to generate [2Y]SUPM /SUPpermuted sequence sets from the original OFDM sequence. Based on a predetermined criteria, there is then selected from the resulting sets of OFDM sequences the one with the best PAPR properties for transmission. The predetermined criteria preferably comprises identifying maximums for all [2Y]SUPM /SUPsequence sets, by calculating the largest PAPR value of Y sequences in each set and selecting a set with the minimum maximum for transmission.
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机译：提供了一种用于在具有Y个发射天线的MIMO-OFDM系统中降低STBC MIMO-OFDM信号的峰均功率比（PAPR）的信号加扰方法。一般而言，每个发射天线在所述信号中的OFDM符号序列被划分为M个大小相等的子块，并沿顺时针方向旋转，并在所有发射天线上进行求逆，以生成[2Y] M 置换原始OFDM序列的序列集。然后，基于预定标准，从所得的OFDM序列集合中选择具有最佳PAPR特性的一个以进行传输。预定标准优选地包括通过计算每个集合中Y序列的最大PAPR值并选择具有最小最大值以进行传输的集合来标识所有[2Y] M 个序列集合的最大值。
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