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    • 27. 发明申请
    • BIT-OPERATED REARRANGEMENT DIVERSITY FOR AICO MAPPING
    • 用于AICO映射的双操作重定向多样性
    • WO2007012339A1
    • 2007-02-01
    • PCT/EP2005/008111
    • 2005-07-26
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.GOLITSCHEK EDLER VON ELBWART, AlexanderWENGERTER, ChristianYOSHII, Isamu
    • GOLITSCHEK EDLER VON ELBWART, AlexanderWENGERTER, ChristianYOSHII, Isamu
    • H04L27/34
    • H04L27/3405H04L1/02H04L1/18H04L25/067H04L27/38
    • Transmit diversity system in which constellation rearrangement is used. Both diversity signals contain the same data and both are 16-QAM, but the location of the data bits within the constellation is different. This averages the effect of the different levels of reliability of the different constellation points. A method for modifying a quadruple of data bits in a data transmission system using Quadrature. Amplitude Modulation with 16 different modulation states, 16-QAM, using an Antipodal Inverted Constellation (AICO) mapping, swapping bits selecting contiguous symbol regions with bits selecting non-contiguous symbol regions. Depending on the particular pre-defined mapping and on the particular permutation of bits, inversion of selected bits may be performed in addition. The quadruples thus obtained are mapped to modulation symbols according to a pre-defined AICO mapping. In the corresponding method for receiving the symbols, likelihood values are swapped and modified in a way which is complementary to the permutation and inversion of bits, before they are combined with likelihood values from other symbols representing the same bits. Method ensures that there is a one to one correspondence between Hamming distance and Euclidian distance for the combined received data. In other words it ensures that, once combined, all 4 bit data words which differ by the same number of bits (Hamming distance) are the same distance apart in the constellation (Euclidian distance).
    • 使用星座重排的发射分集系统。 两个分集信号都包含相同的数据,并且都是16-QAM,但星座内的数据位的位置是不同的。 这平均了不同星座点的不同可靠性水平的影响。 一种用于使用Quadrature修改数据传输系统中的四倍数据位的方法。 具有16种不同调制状态的幅度调制(16-QAM),使用反型反相星座(AICO)映射,交换位选择连续的符号区,其中位选择不连续的符号区。 根据特定的预定义映射和位的特定置换,可以另外执行所选位的反转。 根据预定义的AICO映射将由此获得的四倍数映射到调制符号。 在用于接收符号的相应方法中,在将它们与表示相同比特的其他符号的似然值组合之前,以与位的置换和反相互补的方式交换和修改似然值。 方法确保了组合接收数据的汉明距离和欧氏距离之间有一对一的对应关系。 换句话说,它确保一旦组合,通过相同位数(汉明距离)不同的所有4位数据字在星座(欧几里得距离)中是相同的距离。