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    • 13. 发明申请
    • METHOD AND APPARATUS FOR PROVIDING ANTENNA DIVERSITY IN A WIRELESS COMMUNICATION SYSTEM
    • 在无线通信系统中提供天线多样性的方法和装置
    • WO2007024935A2
    • 2007-03-01
    • PCT/US2006032900
    • 2006-08-22
    • QUALCOMM INCKADOUS TAMERKHANDEKAR AAMODGORE DHANANJAY ASHOKGOROKHOV ALEXEI
    • KADOUS TAMERKHANDEKAR AAMODGORE DHANANJAY ASHOKGOROKHOV ALEXEI
    • H04B7/06
    • H04L5/0023H04B7/0456H04B7/061H04B7/0671H04B7/0691H04B7/0697H04L27/2602
    • Transmission schemes that can flexibly achieve the desired spatial multiplexing order, spatial diversity order, and channel estimation overhead order are described. For data transmission, the assigned subcarriers and spatial multiplexing order (M) for a receiver are determined, where M = 1. For each assigned subcarrier, M virtual antennas are selected from among V virtual antennas formed with V columns of an orthonormal matrix, where V = M. V may be selected to achieve the desired spatial diversity order and channel estimation overhead order. Output symbols are mapped to the M virtual antennas selected for each assigned subcarrier by applying the orthonormal matrix. Pilot symbols are also mapped to the V virtual antennas. The mapped symbols are provided for transmission from T transmit antennas, where T = V. Transmission symbols are generated for the mapped symbols, e.g., based on OFDM or SC-FDMA. Different cyclic delays may be applied for the T transmit antennas to improve diversity.
    • 描述了可以灵活地实现期望的空间复用顺序,空间分集顺序和信道估计开销顺序的传输方案。 对于数据传输,确定接收机的分配子载波和空间复用顺序(M),其中M = 1。对于每个分配的子载波,从由正交矩阵的V列形成的V个虚拟天线中选择M个虚拟天线,其中 可以选择V = M.V以实现期望的空间分集顺序和信道估计开销顺序。 通过应用正交矩阵将输出符号映射到为每个分配的副载波选择的M个虚拟天线。 导频符号也映射到V虚拟天线。 所映射的符号被提供用于从T发射天线发射,其中T = V。例如,基于OFDM或SC-FDMA,为映射符号生成传输符号。 可以对T发射天线应用不同的循环延迟以改善分集。
    • 18. 发明申请
    • INCREMENTAL REDUNDANCY TRANSMISSION FOR MULTIPLE PARALLEL CHANNELS IN A MIMO COMMUNICATION SYSTEM
    • MIMO通信系统中多个并行通道的冗余冗余传输
    • WO2005027355A2
    • 2005-03-24
    • PCT/US2004026491
    • 2004-08-13
    • QUALCOMM INCKADOUS TAMER
    • KADOUS TAMER
    • H04J99/00H04B20060101H04L1/00H04L1/18H04L12/56H04B
    • H04L1/1819H04B7/0417H04L1/0002H04L1/0025H04L1/06H04L25/0328H04L27/2601H04W52/286Y02D50/10
    • For incremental redundancy transmission on multiple parallel channels in a MIMO system, a transmitter processes (e.g., encodes, partitions, interleaves, and modulates) each data packet for each parallel channel based on a rate selected for the parallel channel and obtains multiple symbol blocks for the packet. For each data packet, the transmitter transmits one symbol block at a time on its parallel channel until a receiver recovers the packet or all blocks have been transmitted. The receiver performs detection and obtains symbol blocks transmitted on the parallel channels. The receiver recovers the data packets transmitted on the parallel channels independently or in a designated order. The receiver processes (e.g., demodulates, deinterleaves, re-assembles, and decodes) all symbol blocks obtained for each data packet and provides a decoded packet. The receiver may estimate and cancel interference due to recovered data packets so that data packets recovered later can achieve higher SINRs.
    • 对于MIMO系统中的多个并行信道上的增量冗余传输,发射机基于为并行信道选择的速率对每个并行信道的每个数据分组进行处理(例如,编码,分割,交织和调制),并获得多个符号块 包。 对于每个数据分组,发射机在其并行信道上一次发送一个符号块,直到接收机恢复分组或已经发送所有块。 接收机执行检测并获得在并行信道上发送的符号块。 接收机独立地或以指定的顺序恢复在并行信道上传输的数据包。 接收机处理(例如,解调,解交织,重新组合和解码)为每个数据分组获得的所有符号块,并提供解码的分组。 接收机可以估计和消除由于恢复的数据分组引起的干扰,使得稍后恢复的数据分组可以实现更高的SINR。