Le Chung Tran, T. Wysocki, J. Seberry, A. Mertins, Sarah Spence Adams
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引用次数: 8
摘要
方形、最大速率复正交空时分组码(costbc)的构造是众所周知的,然而,通过已知的方法构造的码中包含大量的零,这阻碍了它们的实际实现。通过对Williamson数组和Wallis-Whiteman数组的改进,使之适用于复数矩阵,我们提出了两种由方阵,阶n码构造方阵,阶4n CO stbc的方法,它们满足一定的性质。利用所提出的方法,我们构造了无零的方形、最大速率、阶8 CO stbc,使发射信号在发射天线中均匀分散。这些代码被称为改进的方形CO stbc,其优点是在每个符号时隙期间通过每个发射天线均匀传输功率,并且每个天线的峰值平均功率比较低,以实现与传统的带有零的CO stbc相同的误码率
Generalized Williamson and Wallis-Whiteman constructions for improved square order-8 CO STBCs
Constructions of square, maximum rate complex orthogonal space-time block codes (CO STBCs) are well known, however codes constructed via the known methods include numerous zeros, which impede their practical implementation. By modifying the Williamson and Wallis-Whiteman arrays to apply to complex matrices, we propose two methods of construction or square, order-4n CO STBCs from square, order-n codes, which satisfy certain properties. Applying the proposed methods, we construct square, maximum rate, order-8 CO STBCs with no zeros, such that the transmitted symbols equally disperse through transmit antennas. Those codes, referred to as the improved square CO STBCs, have the advantages that the power is equally transmitted via each transmit antenna during every symbol time slot and that a lower peak-to-mean power ratio per each antenna is required to achieve the same bit error rates as for the conventional CO STBCs with zeros