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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：US06915118B2
公开(公告)日：2005-07-05
申请号：US09885819
申请日：2001-06-20
申请人： Akihiko Matsuoka
发明人： Akihiko Matsuoka
CPC分类号： H03F1/3229 , H03F1/3241 , H03F2201/3233
摘要： In a transmission power amplifying unit used for radio communications, a non-linear distortion compensator is provided before its main power amplifier. The compensator compensates the main power amplifier for non-linear distortions so as to perform non-linear distortion compensation prior to power amplification of a transmission signal. The transmission signal that has undergone the non-linear distortion compensation is amplified by the main power amplifier. The phase of either the output of the amplifier or the transmission signal is controlled and these two signals are synthesized so that they are in opposite phase. This operation can reduce non-linear distortion components generated in the main power amplifier and thus power consumption of the amplifier. As a result, power consumption of the auxiliary amplifier is reduced and efficiency of power used in the linear compensated amplifying equipment can be improved.
摘要翻译： 在用于无线电通信的发送功率放大单元中，在其主功率放大器之前提供非线性失真补偿器。 补偿器补偿主功率放大器用于非线性失真，以便在发送信号的功率放大之前执行非线性失真补偿。 经过非线性失真补偿的发送信号被主功率放大器放大。 放大器的输出或发送信号的相位被控制，并且这两个信号被合成使得它们处于相反相位。 该操作可以减少主功率放大器中产生的非线性失真分量，从而减少放大器的功耗。 结果，辅助放大器的功率消耗降低，并且可以提高线性补偿放大设备中使用的功率效率。
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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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公开(公告)号：US06324221B1
公开(公告)日：2001-11-27
申请号：US09101443
申请日：1998-07-15
IPC分类号： H04K102
摘要： Nonlinear distortion compensating data is calculated by approximation equations at a compensating coefficient calculation section using an amplitude value of transmission quadrature base band signals obtained by a power calculating section, wherein by carrying out nonlinear distortion compensation at a nonlinear distortion compensating section using the data, it is possible to compensate nonlinear distortion generated in an amplifier of the transmission system without use of any memory table, and a nonlinear distortion compensating section can be obtained, which has a great effect of decrease distortion.
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公开(公告)号：US5561665A
公开(公告)日：1996-10-01
申请号：US509664
申请日：1995-07-31
IPC分类号： H04L27/22 , H04J3/00 , H04L27/00 , H04L27/233 , H04L27/34
CPC分类号： H04L27/2332 , H04L2027/003 , H04L2027/0046 , H04L2027/0053
摘要： An automatic frequency compensation apparatus comprises: a frequency offset prediction portion for predicting a frequency offset of an oscillation signal used for receiving a TDM digital modulation signal from the center frequency of the TDM digital modulation signal using a quadrature baseband signal derived from the TDM digital modulation signal, a vector correlation portion detecting a correlation between the quadrature baseband signal and a predetermined signal, the frequency offset prediction portion predicting when the correlation exceeds a reference value, and a frequency offset compensation portion effects a frequency offset compensation to the quadrature baseband. A convergent coefficient may be decreased with the number of events that the correlation exceeds the reference value. An equalizer may be further provided after the frequency offset compensation portion and the prediction is made using the output of the equalizer. The prediction is effected during the training period or during the training period when the correlation exceeds the reference value. The correlation may be detected using the output of the equalizer and a signal obtained by Judging or digitizing the output of the equalizer.
摘要翻译： 一种自动频率补偿装置，包括：频率偏移预测部，用于使用从TDM数字调制得到的正交基带信号来预测用于从TDM数字调制信号的中心频率接收TDM数字调制信号的振荡信号的频率偏移 信号，检测正交基带信号和预定信号之间的相关性的矢量相关部分，频率偏移预测部分，预测何时相关超过参考值，频率偏移补偿部分对正交基带进行频偏补偿。 会聚系数随着相关值超过参考值的事件数量而减少。 可以在频偏补偿部分之后进一步提供均衡器，并且使用均衡器的输出进行预测。 在训练期间或在相关超过参考值的训练期间进行预测。 可以使用均衡器的输出和通过判断或数字化均衡器的输出而获得的信号来检测相关性。
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公开(公告)号：USRE45368E1
公开(公告)日：2015-02-10
申请号：US13045876
申请日：2011-03-11
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.
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公开(公告)号：US08711762B2
公开(公告)日：2014-04-29
申请号：US13079384
申请日：2011-04-04
IPC分类号： H04W72/04
CPC分类号： H04L5/0058 , H04B1/692 , H04L1/0001 , H04L1/0003 , H04L5/0007 , H04L5/0021 , H04L5/006 , H04L5/0064 , H04L5/0075 , H04L5/0092 , H04L27/0008 , H04L27/2601 , H04W72/0453
摘要： A wireless communication method of a base station that transmits a modulation signal based on an orthogonal frequency division multiplexing scheme to a plurality of terminals. The method includes determining, for each terminal of the plurality of terminals, which subcarrier group or how many symbols along a time axis are to be allocated in a transmission frame, the transmission frame including a first period in which first transmission symbols are arranged and a second period in which second transmission symbols which are different from the first transmission symbols are arranged. The method also includes forming the transmission frame according to a determined allocation, wherein a plurality of symbols on a frequency axis for transmitting N bits (N is a natural number) are arranged within a part of the first period, by using a modulation scheme whereby N bits can be transmitted using one symbol. The method further includes transmitting the modulation signal using the transmission frame.
摘要翻译： 一种将基于正交频分复用方案的调制信号发送到多个终端的基站的无线通信方法。 该方法包括：确定多个终端中的每个终端在传输帧中哪个子载波组或沿着时间轴分配多少个符号，该传输帧包括其中排列有第一个传输符号的第一周期和 其中布置与第一传输符号不同的第二传输符号的第二周期。 该方法还包括根据所确定的分配来形成传输帧，其中，在第一周期的一部分内，通过使用调制方案将用于发送N位（N为自然数）的频率轴上的多个符号排列在第一周期的一部分内， 可以使用一个符号发送N个位。 该方法还包括使用传输帧发送调制信号。
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59.发明授权Multi-mode control station, radio communication system, radio station, and radio communication control method 有权多模控制站，无线通信系统，无线电台，无线通信控制方式公开(公告)号：US08355748B2
公开(公告)日：2013-01-15
申请号：US11597511
申请日：2005-03-07
摘要： The overall throughput of the radio communication traffic in a radio communication area in a radio communication environment where a plurality of types of radio communication systems are mixedly used in a neighboring radio communication area is improved. When a multi-mode control station (101) performs communication with a terminal station in a network through a plurality of types of communication systems, a communication link parameter collecting section (10141) collects parameters indicating the states of the communication links. A resource allocation determining section (10143) determines communication resource allocation for which the throughput is the greatest for each resource allocation period according to the parameters. A communication control section (1015) controls a multi-mode communication unit (1012) according to the result of the determination.
摘要翻译： 改善了在相邻无线电通信区域中混合使用多种类型的无线电通信系统的无线电通信环境中的无线电通信区域中的无线电通信业务的总吞吐量。 当多模式控制站（101）通过多种类型的通信系统与网络中的终端站进行通信时，通信链路参数采集部分（10141）收集指示通信链路的状态的参数。 资源分配确定部（10143）根据参数确定每个资源分配周期的吞吐量最大的通信资源分配。 通信控制部分（1015）根据确定的结果控制多模式通信单元（1012）。
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公开(公告)号：US20120257688A1
公开(公告)日：2012-10-11
申请号：US13494917
申请日：2012-06-12
CPC分类号： H04L25/0204 , H04B7/0413 , H04B7/06 , H04B7/0626 , H04B7/0632 , H04B7/0671 , H04B7/0689 , H04B7/0697 , H04B7/082 , H04L1/0618 , H04L5/0023 , H04L5/003 , H04L5/0048 , H04L25/0206 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/2627 , H04L27/2649 , H04L27/2657 , H04L27/2659 , H04L27/2691 , H04L27/2695 , H04L69/22 , H04W52/52 , H04W72/0453
摘要： A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.
摘要翻译： 发送装置包括生成第一OFDM调制信号和第二OFDM调制信号的多个正交频分复用（OFDM）调制信号发生器。 发送装置还包括在相同频带中从第一天线发送第一OFDM调制信号和来自第二天线的第二OFDM调制信号的发送器。 提供了一种接收装置，其包括接收多个OFDM调制信号的多个天线; 多个OFDM解调器，其使用傅里叶变换将所述多个OFDM调制信号变换为多个接收信号; 估计器，其使用所述多个接收信号中包含的用于解调的一个或多个符号来输出失真估计信号; 以及解调器，其使用失真估计信号来补偿接收信号的失真，并且解调包含在接收信号中的数据符号。
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