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    • 69. 发明授权
    • Radio transmission device
    • 无线传输设备
    • US07948960B2
    • 2011-05-24
    • US11663668
    • 2005-09-20
    • Naoki Okamoto
    • Naoki Okamoto
    • H04B1/38H04J1/00H04J11/00H04J9/00H04L5/04
    • H04L5/006H04B7/0697H04L1/0003H04L5/0007H04L5/0016H04L5/0023H04L5/0026H04L5/0028H04L5/0039H04L5/0046H04L5/0092
    • To obtain maximum throughput in accordance with characteristics of a propagation path, a radio transmission device having a plurality of transmitting antennas (18a, 18b) for transmitting a transmission signal in units of sub-carriers by performing spatial multiplexing or without performing spatial multiplexing is provided that includes a sub-carrier modulation part 11 modulating the input transmission signal for each sub-carrier, a transmission signal allocation part 13 allocating the transmission signal modulated for each of the sub-carriers to each of the transmitting antennas, and a transmission control part 12 that determines a multiplexing number for performing spatial multiplexing for each sub-carrier based on information received from another radio communication device as an opposite party, and outputs the determined multiplexing number to the sub-carrier modulation part and the transmission signal allocation part.
    • 为了根据传播路径的特性获得最大吞吐量,提供了具有多个发送天线(18a,18b)的无线电发送装置,用于通过执行空间复用或不执行空间复用来以子载波为单位发送发送信号 包括对每个子载波调制输入发送信号的子载波调制部分11,将针对每个子载波调制的发送信号分配给每个发送天线的发送信号分配部分13以及发送控制部分 12,根据从作为对方的另一无线通信装置接收到的信息,决定用于对每个子载波进行空间复用的多路复用数,并将所确定的多路复用数输出到副载波调制部和发送信号分配部。
    • 70. 发明申请
    • RECEIVING APPARATUS, RECEIVING METHOD AND COMMUNICATION SYSTEM
    • 接收装置,接收方法和通信系统
    • US20100316151A1
    • 2010-12-16
    • US12866175
    • 2009-02-04
    • Kazuhiko FukawaHiroshi SuzukiSatoshi SuyamaRyuta YamadaNaoki Okamoto
    • Kazuhiko FukawaHiroshi SuzukiSatoshi SuyamaRyuta YamadaNaoki Okamoto
    • H04L27/28
    • H04L25/03171H04L2025/03426
    • To obtain excellent reception performance whilst cutting down the amount of computing operation in a MIMO communication system using soft-decision error correction coding. Received waves picked up by receiving antennas 401-1 to 401-R are converted from the radio frequency to the baseband signal by respective receivers 402-1 to 402-R to be output as a received signal. A signal detector 403 calculates bit LLRs of the transmitted signal based on the received signal and the channel-estimated values obtained from a channel estimator 404. The bit LLRs output from signal detector 403 are rearranged by deinterleaver units 405-1 to 405-T in the patterns opposite to the patterns in which interleaving was performed on the transmission side. The bit LLRs after de-interleaving are subjected to an error correction decoding process through decoders 406-1 to 406-T. The bit sequences after decoding are parallel-to-serial converted by a parallel-to-serial converter 407 so that the detected transmission bit sequence is output.
    • 为了获得良好的接收性能,同时在使用软判决纠错编码的MIMO通信系统中减少计算操作的量。 由接收天线401-1至401-R拾取的接收波由各接收器402-1至402-R从射频转换为基带信号,以作为接收信号输出。 信号检测器403基于从信道估计器404获得的接收信号和信道估计值来计算发送信号的比特LLR。从信号检测器403输出的比特LLR由解交织器单元405-1至405-T重新排列 与在发送侧执行交织的模式相反的模式。 解交织后的比特LLR经由解码器406-1至406-T进行纠错解码处理。 解码后的比特序列由并行到串行转换器407并行 - 串行转换,从而输出所检测的传输比特序列。