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    • 2. 发明专利
    • Rate adaptive transmission scheme for the Mimo system
    • 用于MIMO系统的速率自适应传输方案
    • JP2011130492A
    • 2011-06-30
    • JP2011028976
    • 2011-02-14
    • Qualcomm Incクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • AGRAWAL AVNEESHVIJAYAN RAJIVKADOUS TAMER
    • H04B7/00H04J99/00H04B7/005H04B7/04H04B7/06H04B7/08H04J13/18H04L1/00H04L1/06H04W16/28
    • H04L1/0618H04B7/0417H04B7/0443H04B7/0465H04B7/0615H04B7/0891H04W52/34H04W52/42
    • PROBLEM TO BE SOLVED: To provide a technique for transmission scheme that supports spatial multiplexing, provides a transmission diversity, and fully utilizes the available transmission power in MIMO systems. SOLUTION: A rate adaptive transmission scheme for MIMO systems, which transmits a variable number of data symbol streams, provides transmission diversity for each data symbol stream, and fully utilizes the total transmission power of the system and the full power of each antenna. In one method, at least one data symbol stream is received for transmission from a plurality of antennas. Each data symbol stream is scaled with a respective weight corresponding to the amount of transmit power allocated to that stream. The scaled data symbol stream(s) is (are) multiplied with a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas. The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a DFT matrix) is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at (or near) the full power for the associated antenna. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供支持空间复用的传输方案技术,提供传输分集,并充分利用MIMO系统中的可用传输功率。 解决方案:传输可变数量的数据符号流的MIMO系统的速率自适应传输方案为每个数据符号流提供传输分集,并充分利用系统的总传输功率和每个天线的全功率 。 在一种方法中,接收至少一个数据符号流用于从多个天线发射。 每个数据符号流用对应于分配给该流的发射功率的量的相应权重进行缩放。 缩放的数据符号流与发射基矩阵相乘以提供多个天线的多个发射符号流。 定义发射基矩阵(例如,沃尔什 - 哈达玛矩阵或DFT矩阵),使得每个数据符号流从所有天线发送,并且每个发射符号流以(或接近)相关天线的全功率发射。 版权所有(C)2011,JPO&INPIT