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    • 76. 发明申请
    • WIRELESS COMMUNICATION METHOD AND SYSTEM FOR INDEXING CODEBOOK AND CODEWORD FEEDBACK
    • 无线通信方法和索引代码反馈的系统
    • WO2008021062A1
    • 2008-02-21
    • PCT/US2007/017506
    • 2007-08-06
    • INTERDIGITAL TECHNOLOGY CORPORATIONPAN, Kyle, Jung-LinOZLUTURK, Fatih M.
    • PAN, Kyle, Jung-LinOZLUTURK, Fatih M.
    • H04L1/00H04L1/06
    • H04L1/0014H04B7/0417H04B7/0639H04B7/0663H04L1/0027H04L1/0028
    • The present invention is related to indexing channel information feedback in a multiple-input multiple-output (MIMO)-based wireless communication system. In one embodiment, at least one measurement of a channel metric is performed. The measured channel metric is quantized and a codeword is selected that represents the measured channel metric. Feedback is generated based on the channel metric measurement. The feedback includes an index to the selected codeword. A codebook is generated by partitioning a plurality of codewords into two or more tiers, assigning indices to the codewords and correlating the codewords in complex vector space and Hamming distance in binary indices. For any given codeword, a first subset of the codewords may have a higher correlation with respect to the given codeword. In another embodiment, the number of bits used to report codebook indexing is determined based on the frequency of the generation of the feedback.
    • 本发明涉及在基于多输入多输出(MIMO)的无线通信系统中索引信道信息反馈。 在一个实施例中,执行信道度量的至少一个测量。 测量的信道度量被量化,并且选择代表所测量的信道度量的码字。 基于信道度量测量生成反馈。 反馈包括所选码字的索引。 通过将多个码字分成两个或多个层来分配索引并将复杂向量空间中的码字和二进制索引中的汉明距离相关联来生成码本。 对于任何给定的码字,码字的第一子集可以具有相对于给定码字的更高的相关性。 在另一个实施例中,用于报告码本索引的比特数是基于反馈的生成的频率来确定的。