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公开(公告)号：US07515714B2
公开(公告)日：2009-04-07
申请号：US10502048
申请日：2003-02-27
IPC分类号： H04F9/00
CPC分类号： H04B1/7113 , H04B1/7115 , H04K1/00 , H04L9/0858 , H04L2209/60 , H04L2209/80 , H04W12/04
摘要： A communication apparatus includes a reference signal generating section, a transmitting section, a propagation estimating section, a first data acquiring section, and a decoding section. The reference signal generating section generates a first reference signal to enable a communicating party to estimate a propagation environment. The transmitting section transmits the first reference signal. The propagation estimating section estimates a first propagation estimation value of the propagation environment using a second reference signal transmitted from the communicating party. The first data acquiring section generates first data using the first propagation estimation value. The decoding section decodes a transmission signal encoded using a second propagation estimation value that is estimated by the communicating party using the first reference signal, to obtain second data using the first data.
摘要翻译： 通信装置包括参考信号产生部分，发送部分，传播估计部分，第一数据获取部分和解码部分。 参考信号产生部分生成第一参考信号以使通信方能够估计传播环境。 发送部发送第一参考信号。 传播估计部使用从通信对方发送的第二参考信号来估计传播环境的第一传播估计值。 第一数据获取部使用第一传播估计值来生成第一数据。 解码部分使用由第一参考信号由通信方估计的第二传播估计值来编码的传输信号，以使用第一数据来获得第二数据。
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52.发明申请公开(公告)号：US20090074086A1
公开(公告)日：2009-03-19
申请号：US11577791
申请日：2005-08-24
IPC分类号： H04L27/28
CPC分类号： H04L5/0048 , H04B7/0413 , H04B2201/70701 , H04J13/18 , H04L5/0007 , H04L5/0023 , H04L25/0206 , H04L27/2613 , H04L27/2628 , H04L27/265 , H04L27/2657 , H04L2027/0024
摘要： A MIMO-OFDM transmission apparatus is provided which allows high accuracy estimation of frequency offset, high accuracy estimation of a transmission path fluctuation and high accuracy synchronization/signal detection.Pilot symbol mapping (1111) is provided for forming pilot carriers by assigning orthogonal sequences to corresponding subcarriers among OFDM signals which are transmitted at the same time from respective antennas in the time domain.Even when pilot symbols are multiplexed among a plurality of channels (antennas), this allows frequency offset/phase noise to be estimated with high accuracy.
摘要翻译： 提供了MIMO-OFDM发送装置，其允许频率偏移的高精度估计，传输路径波动的高精度估计和高精度同步/信号检测。 提供导频符号映射（1111），用于通过在从时域中的各个天线同时发送的OFDM信号中分配正交序列到对应的子载波来形成导频载波。 即使在多个信道（天线）中复用导频符号的情况下，也能够高精度地估计频率偏移/相位噪声。
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公开(公告)号：US07362824B1
公开(公告)日：2008-04-22
申请号：US09240632
申请日：1999-02-01
IPC分类号： H04L27/20
CPC分类号： H04L27/0008 , H04L25/0232 , H04L27/34
摘要： An input digital signal is periodically and alternately subjected to first modulation and second modulation, being thereby converted into a pair of a baseband I signal and a baseband Q signal. The first modulation and the second modulation are different from each other. The pair of the baseband I signal and the baseband Q signal are outputted. The first modulation may be at least 8-signal-point modulation while the second modulation may be phase shift keying.
摘要翻译： 输入数字信号周期性地交替进行第一调制和第二调制，从而转换成一对基带I信号和基带Q信号。 第一调制和第二调制彼此不同。 输出一对基带I信号和基带Q信号。 第一调制可以是至少8信号点调制，而第二调制可以是相移键控。
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公开(公告)号：US07280840B2
公开(公告)日：2007-10-09
申请号：US10704653
申请日：2003-11-12
IPC分类号： H04B7/005
CPC分类号： H04B7/043 , H04B7/0621 , H04B7/0848 , H04B17/24 , H04B17/318 , H04W52/42
摘要： Channel fluctuation values on propagation paths of modulated signals transmitted from a plurality of antennas are estimated, an eigenvalue of a channel fluctuation matrix created with the above-mentioned channel fluctuation values as elements is found in order to relate antenna received signals to modulated signals, and using that eigenvalue, receiving antenna selection, combining of modulated signals, and weighting processing on soft decision decoded values, are performed, and modulated signals are demodulated. By this means, it is possible to perform demodulation processing based on the effective reception power of a modulated signal (that is to say, the essential reception power, of the reception power obtained by a receiving apparatus, that can be effectively used when demodulating a modulated signal), enabling the precision of demodulation of modulated signals to be improved.
摘要翻译： 估计从多个天线发送的调制信号的传播路径上的信道波动值，找到以上述信道变动值作为要素而生成的信道变动矩阵的特征值，以将天线接收信号与调制信号相关联， 使用该特征值，接收天线选择，调制信号的组合和对软判决解码值的加权处理，并且调制信号被解调。 通过这种方式，可以基于调制信号（也就是接收设备获得的接收功率的基本接收功率）的有效接收功率进行解调处理，当解调 调制信号），能够提高调制信号的解调精度。
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公开(公告)号：US07280611B2
公开(公告)日：2007-10-09
申请号：US10410323
申请日：2003-04-09
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3282 , H03F1/34 , H03F3/24 , H03F2201/3233 , H04B7/15535 , H04B2001/0433
摘要： A nonlinear distortion compensating device splits its operation into two processes. One is a compensation & amplification process for providing a receipt signal with a distortion compensating calculation and amplification before outputting the signal with phase and amplitude compensated. The other is an environmentally adapting process for modulating the signal demodulated from the input signal. Then in this process, a distortion estimating updater estimates a distortion amount using the modulated signal and a feed back signal of parts of the output supplied from the distortion compensating calculator, and updates a distortion compensating coefficient stored in the distortion compensating calculator.
摘要翻译： 非线性失真补偿装置将其操作分为两个过程。 一个是补偿和放大过程，用于在输出具有相位和幅度补偿的信号之前提供具有失真补偿计算和放大的接收信号。 另一种是用于调制从输入信号解调的信号的环境适应过程。 然后在该过程中，失真估计更新器使用调制信号和从失真补偿计算器提供的输出部分的反馈信号来估计失真量，并且更新存储在失真补偿计算器中的失真补偿系数。
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公开(公告)号：US20070098103A1
公开(公告)日：2007-05-03
申请号：US10580398
申请日：2004-11-04
CPC分类号： H04L1/06 , H04B7/0413 , H04B7/0854 , H04L1/0054 , H04L1/006 , H04L1/007 , H04L25/03305 , H04L25/03324 , H04L25/03891 , H04L25/061 , H04L27/3488 , H04L27/38 , H04L2025/03611 , H04N19/39
摘要： A partial bit demodulation section (550) that demodulates partial bits among a plurality of bits that form 1 symbol of each modulated signal using a detection method different from likelihood detection, signal point reduction sections (514 and 516) that reduce the number of candidate signal points using demodulated partial bits, and a likelihood detection section (518) that obtains received digital signals (322 and 323) by performing likelihood detection based on the Euclidian distances between the reduced candidate signal points and a reception point, are provided. By this means, only some bits which are unlikely to be erroneous are found by the partial bit demodulation section (550), and other bits can be found by the likelihood detection section (518), enabling bit error rate performances to be effectively improved with a comparatively small computational complexity.
摘要翻译： 使用不同于似然检测的检测方法对形成每个调制信号的1个符号的多个比特中的部分比特进行解调的部分比特解调部分（550），减少候选信号数目的信号点减少部分（514和516） 提供使用解调部分比特的点，以及通过基于缩小候选信号点与接收点之间的欧几里德距离执行似然度检测来获得接收数字信号（322和323）的似然检测部分（518）。 通过这种方式，部分比特解调部分（550）仅发现一些不太可能出错的比特，并且可靠性检测部分（518）可以找到其他比特，从而能够有效地提高比特错误率性能， 相对较小的计算复杂度。
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公开(公告)号：US07206606B2
公开(公告)日：2007-04-17
申请号：US10516936
申请日：2003-11-26
CPC分类号： H04L5/023 , H04L1/0003 , H04L1/0618
摘要： A wireless communication apparatus includes a plurality of antennas that transmit modulation signals. A controller controls a control signal of the modulation signals based on an eigenvalue corresponding to a channel matrix generated using the modulation signals received by a communicating party.
摘要翻译： 无线通信装置包括发送调制信号的多个天线。 控制器基于与由通信方接收的调制信号生成的信道矩阵相对应的特征值来控制调制信号的控制信号。
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公开(公告)号：US20060234729A1
公开(公告)日：2006-10-19
申请号：US10562555
申请日：2004-06-30
IPC分类号： H04Q7/20
CPC分类号： H04B7/0413 , H04B7/0608 , H04B7/0613 , H04B7/0689 , H04B7/0697 , H04L1/06
摘要： Of any one of transmission method X of transmitting modulated signal A and modulated signal B including the same data from a plurality of antennas and transmission method Y of transmitting modulated signal A and modulated signal B having different data from the plurality of antennas, base station apparatus 201 does not change the transmission method during data transmission and changes only the modulation scheme. Base station apparatus 201 transmits modulated signal A and modulated signal B to communication terminal apparatus 251 using the determined transmission method and modulation scheme. In this way, it is possible to improve data transmission efficiency when transmitting data using the plurality of antennas.
摘要翻译： 发送调制信号A的发送方法X和包含来自多个天线的相同数据的调制信号B和从多个天线发送调制信号A和调制信号B的数据不同的发送方式Y中的任一种，基站装置 201在数据传输期间不改变传输方法，并且仅改变调制方案。 基站装置201使用确定的发送方法和调制方式向调制信号A和调制信号B发送到通信终端装置251。 以这种方式，可以在使用多个天线发送数据时提高数据传输效率。
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公开(公告)号：US06608868B1
公开(公告)日：2003-08-19
申请号：US09482892
申请日：2000-01-14
IPC分类号： H04L2302
CPC分类号： H04L7/04 , H04L7/06 , H04L27/0008 , H04L27/206 , H04L27/34 , H04L27/3405 , H04L27/3455 , H04L2027/0024 , H04L2027/0087 , H04L2027/0093
摘要： In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.
摘要翻译： 在每3个或更多符号插入一个导频符号的多值调制类型中，使用与导频符号不同的调制类型来调制紧接在导频符号之前和之后的每个符号的信号点。 以这种方式，可以抑制通过导频符号估计基准相位和频率偏移量的精度的劣化，并且通过符号同步为符号的符号来改善准相干检测中的信噪比中的误码率特性 不完全成立
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60.发明授权Radio communication method and apparatus selectively employing a plurality of antennas 有权选择性地采用多个天线的无线通信方法和装置公开(公告)号：US08457234B2
公开(公告)日：2013-06-04
申请号：US12637524
申请日：2009-12-14
CPC分类号： H04B7/0604 , H04B7/0608 , H04B7/0689 , H04B7/0691 , H04L25/0204 , H04L25/0224 , H04L27/18 , H04L27/2601 , H04L27/261
摘要： A transmitting apparatus that transmits signals from a plurality of antennas, and can improve the security of communication compared with a conventional system. In this apparatus, an antenna changing section (105) stores an antenna change pattern in internal memory, and each time a clock signal is input, generates an antenna change signal directing an antenna change in accordance with the antenna change pattern, and outputs this signal to an antenna selection section (106). Based on the antenna change signal, the antenna selection section (106) selects two different antennas from among the transmitting antennas (107-1 through 107-3) as transmitting antennas of transmit signal A output from a radio section (104-1) and transmit signal B output from a radio section (104-2), and performs radio transmission of transmit signal A and transmit signal B using the selected transmitting antennas.
摘要翻译： 从多个天线发送信号的发送装置，与以往的系统相比，能够提高通信的安全性。 在该装置中，天线变换部（105）将天线变换模式存储在内部存储器中，并且每次输入时钟信号时，根据天线变化模式生成指示天线变化的天线变换信号，并输出该信号 到天线选择部分（106）。 基于天线变换信号，天线选择部（106）从发送天线（107-1〜107-3）中选择2个不同的天线作为从无线部（104-1）输出的发送信号A的发送天线， 从无线电部分（104-2）输出的发送信号B，并且使用所选择的发送天线执行发送信号A和发送信号B的无线电发送。
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