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21. 发明授权

US08331510B2 Receiver and method for two-stage equalization with sequential search 有权
标题翻译：具有顺序搜索的两级均衡的接收机和方法
公开(公告)号：US08331510B2
公开(公告)日：2012-12-11
申请号：US12419053
申请日：2009-04-06
申请人： Ali Khayrallah , Gregory Bottomley
发明人： Ali Khayrallah , Gregory Bottomley
IPC分类号： H03D1/06 , H03D11/04 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04B7/005 , H04L25/03178
摘要： A receiver and method are described herein that address inter-symbol interference in a received signal by using a two-stage equalizer which includes a first demodulation stage that processes the received signal and produces initial symbol decisions, and a non-linear equalization second stage that uses the received signal to perform a sequential search in an attempt to improve upon the initial symbol decisions where if able to improve upon the initial symbol decisions then an output sequence is obtained from the sequential search and if not able to improve upon the sequence metric threshold then the output sequence is the initial symbol decisions.
摘要翻译：本文描述了一种接收机和方法，其通过使用包括处理接收信号并产生初始符号决定的第一解调级的两级均衡器来解决接收信号中的符号间干扰，以及非线性均衡第二级，使用所接收的信号来执行顺序搜索以尝试改进初始符号决定，其中如果能够改进初始符号判定，则从顺序搜索获得输出序列，并且如果不能改进序列度量阈值那么输出序列是初始符号决定。

22. 发明授权

US08331507B2 Multi-channel receiver device 有权
标题翻译：多通道接收机设备
公开(公告)号：US08331507B2
公开(公告)日：2012-12-11
申请号：US12864084
申请日：2009-01-28
申请人： Richard John Caldwell , Robert Fifield
发明人： Richard John Caldwell , Robert Fifield
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04B1/1027 , H04L27/0008 , H04L27/0012 , H04W52/0245 , Y02D70/1222 , Y02D70/1242 , Y02D70/142 , Y02D70/164 , Y02D70/40
摘要： A device processes signals from a plurality of signal channels that are received in parallel. A channel processing circuit (12a,b, 14a,b), applies a series of filtering operations selectively to the signal from a first one of the signal channels. A filter management circuit (18) detects a reception condition from reception of a signal in a second one of the signal channels. The filter management circuit (18) controls application of at least a part of said filtering operations to the signal from the first one the signal channels by the channel processing circuit (12a,b, 14a,b), dependent on the detected reception condition. Selected filter operations may be enabled or disabled. Thus, power consumption may be reduced. In an embodiment, the detected reception condition is determined as a by-product of functional reception of another channel. Thus power consumption for the detection of the reception condition is also reduced. From reception of specific types of channels, for example, it may be detected whether the device is indoors or outdoors and filtering of other channels may be adapted accordingly.
摘要翻译：设备处理来自并行接收的多个信号信道的信号。信道处理电路（12a，b，14a，b）对来自第一信号信道的信号选择性地应用一系列滤波操作。滤波器管理电路（18）从第二信号信道中的信号的接收中检测接收状态。滤波器管理电路（18）根据检测到的接收条件，控制信道处理电路（12a，b，14a，b）对信号通道的信号的至少一部分的滤波操作的应用。可以启用或禁用所选的过滤器操作。因此，可以降低功耗。在一个实施例中，检测到的接收条件被确定为另一信道的功能接收的副产品。因此，用于检测接收条件的功耗也降低。例如，从特定类型的信道的接收中，可以检测设备是室内还是室外，并且可以相应地调整其他信道的过滤。

23. 发明授权

US08175201B2 Systems and methods for adaptive equalization in recording channels 有权
标题翻译：记录通道自适应均衡的系统和方法
公开(公告)号：US08175201B2
公开(公告)日：2012-05-08
申请号：US12663325
申请日：2008-10-27
申请人： George Mathew , Yuan Xing Lee , Hongwei Song , Liu Jingfeng , Jongseung Park
发明人： George Mathew , Yuan Xing Lee , Hongwei Song , Liu Jingfeng , Jongseung Park
IPC分类号： H03D1/06 , H03D11/04 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： G11B19/041 , G11B5/09 , G11B20/10009 , G11B20/10046 , G11B20/10481 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for performing adaptive equalization. For example, various embodiments of the present invention provide methods for adaptive equalization that include providing a data processing system with an equalizer circuit (210) and a target filter circuit (265). The equalizer circuit performs equalization based at least in part on an equalizer coefficient (215). The methods further include generating an error (285) based upon a first output from the equalizer circuit and a second output from the target filter circuit. An inter-symbol interference component (295) is extracted from the error (285) and used to calculate an equalizer gradient (226). Based at least in part on the equalizer gradient (226), the equalizer coefficient (215) is calculated.
摘要翻译：本发明的各种实施例提供了用于执行自适应均衡的系统和方法。例如，本发明的各种实施例提供了用于自适应均衡的方法，其包括向数据处理系统提供均衡器电路（210）和目标滤波器电路（265）。均衡器电路至少部分地基于均衡器系数（215）来执行均衡。所述方法还包括基于均衡器电路的第一输出和来自目标滤波器电路的第二输出产生误差（285）。从误差（285）提取符号间干扰分量（295），并用于计算均衡器梯度（226）。至少部分基于均衡器梯度（226），计算均衡器系数（215）。

24. 发明授权

US08175200B2 Hybrid correlation and least squares channel estimation 有权
标题翻译：混合相关和最小二乘方估计
公开(公告)号：US08175200B2
公开(公告)日：2012-05-08
申请号：US12641450
申请日：2009-12-18
申请人： Dayong Chen
发明人： Dayong Chen
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04L25/0212 , H04L25/0224 , H04L25/025 , H04L25/03299 , H04L25/03993
摘要： A hybrid channel estimator for a wireless communication system receiver includes both correlation based and least squares based channel estimators. The correlation estimator is used when signal quality is low or noise is colored. The least squares estimator is used when signal quality is high or noise is white. An interference suppression filter improves signal quality by suppressing interference in a received signal. Generally, correlation channel estimation is performed initially, when signal quality is low and noise is colored, and interference suppression filtering is performed to increase signal quality by removing certain portion of interference and whitening the overall impairment spectrum. These may be done iteratively. When the signal quality improves, least squares channel estimation is performed, which may also be iterative. The training sequence and noise may be whitened prior to performing least squares channel estimation, which is the final operation before channel estimates are forwarded to a demodulator.
摘要翻译：用于无线通信系统接收机的混合信道估计器包括基于相关和基于最小二乘的信道估计器。当信号质量低或噪声有色时，使用相关估计器。当信号质量高或噪声为白色时，使用最小二乘估计器。干扰抑制滤波器通过抑制接收信号中的干扰来提高信号质量。一般来说，当信号质量低，噪声有色时，首先执行相关信道估计，并且通过去除某些部分干扰并使整个损伤谱变白来执行干扰抑制滤波以提高信号质量。这些可以迭代地进行。当信号质量提高时，执行最小二乘方信道估计，其也可以是迭代的。在执行最小二乘信道估计之前，训练序列和噪声可能变白，这是在信道估计被转发到解调器之前的最终操作。

25. 发明授权

US08111789B2 Method and system for channel estimation in a single channel MIMO system with multiple RF chains for WCDMA/HSDPA 有权
标题翻译：用于WCDMA / HSDPA的具有多个RF链的单通道MIMO系统中信道估计的方法和系统
公开(公告)号：US08111789B2
公开(公告)日：2012-02-07
申请号：US11173305
申请日：2005-06-30
申请人： Mark Kent , Vinko Erceg , Uri M. Landau , Pieter Van Rooyen
发明人： Mark Kent , Vinko Erceg , Uri M. Landau , Pieter Van Rooyen
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04L1/00 , H04L25/08 , H04B1/10
CPC分类号： H04L25/0204 , H04B1/712
摘要： Aspects of a method and system for channel estimation in a MIMO communication system with multiple RF chains for WCDMA/HSDPA may comprise receiving a plurality of communication signals from a plurality of transmit antennas. A plurality of vectors of baseband combined channel estimates may be generated based on phase rotation of the received plurality of communication signals. A matrix of processed baseband combined channel estimates may be generated based on the generated plurality of vectors of baseband combined channel estimates. A plurality of amplitude and phase correction signals may be generated based on the generated plurality of vectors of baseband combined channel estimates. An amplitude and a phase of at least a portion of the received plurality of communication signals may be adjusted based on the generated plurality of amplitude and phase correction signals, respectively.
摘要翻译：在具有用于WCDMA / HSDPA的多个RF链的MIMO通信系统中用于信道估计的方法和系统的方面可以包括从多个发射天线接收多个通信信号。可以基于所接收的多个通信信号的相位旋转来生成基带组合信道估计的多个向量。可以基于所生成的多个基带组合信道估计向量来生成经处理的基带组合信道估计的矩阵。可以基于生成的基带组合信道估计的多个矢量来生成多个幅度和相位校正信号。可以基于所生成的多个幅度和相位校正信号来调整所接收的多个通信信号的至少一部分的振幅和相位。

26. 发明授权

US08094761B2 Uplink feedback for supporting MIMO operation in the LTE downlink 有权
标题翻译：用于在LTE下行链路中支持MIMO操作的上行链路反馈
公开(公告)号：US08094761B2
公开(公告)日：2012-01-10
申请号：US12285095
申请日：2008-09-29
申请人： Jianzhong Zhang , Juho Lee , Farooq Khan , Zhouyue Pi
发明人： Jianzhong Zhang , Juho Lee , Farooq Khan , Zhouyue Pi
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04L1/0029 , H04B7/0632 , H04B7/0641 , H04L5/0007 , H04W72/08 , H04W72/085
摘要： A quantization method of transmission of channel quality information (CQI) includes measuring two measurements SINRs and calculating a difference (i.e., Delta SINR) between the two measurements of the SINRs; determining a CQIbase (base channel quality information) based on one of the two measurements SINRs and a known quantization table for the CQIbase, and simultaneously receiving cell-specific or UE-specific parameters transmitted from a base station and configuring a quantization table defining a mapping method of CQIdelta (delta channel quality information) and the Delta SINR and determining the CQIdelta based on the obtained Delta SINR and the configured quantization table; and transmitting the resulting CQIdelta and CQIbase.
摘要翻译：信道质量信息（CQI）的传输的量化方法包括测量两个测量SINR并计算SINR的两个测量之间的差值（即，ΔΣRR）; 基于两个测量SINR中的一个确定CQIbase（基本信道质量信息）和用于CQIbase的已知量化表，并同时接收从基站发送的小区特定或UE特定参数，并配置定义映射的量化表 CQIdelta方法（delta信道质量信息）和Delta SINR，并且基于获得的Delta SINR和配置的量化表来确定CQIdelta; 并发送所得到的CQIdelta和CQIbase。

27. 发明授权

US08064554B2 Radio communication system performing multi-carrier transmission, reception device, reception method, transmission device, transmission method, delay time calculation device, and delay time calculation method 有权
标题翻译：执行多载波传输的无线通信系统，接收装置，接收方法，传输装置，传输方法，延迟时间计算装置和延迟时间计算方法
公开(公告)号：US08064554B2
公开(公告)日：2011-11-22
申请号：US10548382
申请日：2004-06-07
申请人： Mitsuhiro Suzuki , Chihiro Fujita , Takashi Usui
发明人： Mitsuhiro Suzuki , Chihiro Fujita , Takashi Usui
IPC分类号： H03D1/06 , H03D11/04 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04L27/2605
摘要： Multi-carrier transmission is performed without inserting a repetitive signal into guard interval periods. A transmitter provides guard interval periods by using a null signal to save transmission power and prevent the deterioration of the SN ratio. Delayed waves at the head of each received symbol cause high-frequency waves to occur and carriers to interfere with one another. Accordingly, a receiver adds a component following each received symbol to a delayed-wave component at the head of the received symbol. As a result, the delayed-wave component at the head of the received symbol and the added component become continuous in wave form and subcarriers do not interfere with each other.
摘要翻译：执行多载波传输而不将重复信号插入保护间隔周期。发射机通过使用空信号来节省传输功率并防止SN比的恶化来提供保护间隔周期。每个接收到的符号的头部的延迟波导致高频波发生，并且载波彼此干扰。因此，接收机将接收到的符号之后的分量添加到接收符号的头部的延迟波分量。结果，接收符号的头部的延迟波分量和相加分量在波形上变得连续，并且子载波不彼此干扰。

28. 发明授权

US08019029B1 Interference erasure using soft decision weighting of the Viterbi decoder input in OFDM systems 有权
标题翻译：在OFDM系统中使用维特比解码器输入的软判决加权进行干扰消除
公开(公告)号：US08019029B1
公开(公告)日：2011-09-13
申请号：US12062392
申请日：2008-04-03
申请人： Ognjen Katic
发明人： Ognjen Katic
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04L27/2647 , H04L1/0047 , H04L1/0054 , H04L25/03821 , H04L25/03891 , H04L2025/03426
摘要： Disclosed is a technique for mitigating the effect of an in-band interferer in Orthogonal Frequency Division Multiplexing (OFDM) wireless or wired networks that employ soft decision Viterbi decoder in the physical layer. The technique uses an independent estimation of the signal quality, which is passed to the Viterbi algorithm decoder so that it is able to discard the corrupted subcarriers. This improves the error correction capability of the Viterbi algorithm decoder in a receiver, which leads to fewer retransmissions and into higher information throughput.
摘要翻译：公开了一种用于减轻在物理层中采用软判决维特比解码器的正交频分复用（OFDM）无线或有线网络中的带内干扰源的影响的技术。该技术使用对信号质量的独立估计，其被传递到维特比算法解码器，使得其能够丢弃已损坏的子载波。这提高了接收机中维特比算法解码器的纠错能力，导致更少的重传和更高的信息吞吐量。

29. 发明授权

US08009780B2 Apparatus and method for generating effective signal to noise ratio (SNR) per stream in multiple-input multiple-output (MIMO) wireless communication system 有权
标题翻译：用于在多输入多输出（MIMO）无线通信系统中每个流产生有效信噪比（SNR）的设备和方法
公开(公告)号：US08009780B2
公开(公告)日：2011-08-30
申请号：US12217868
申请日：2008-07-09
申请人： Eun-Seok Ko , Tak-Ki Yu , Yung-Soo Kim , Myeon-Kyun Cho
发明人： Eun-Seok Ko , Tak-Ki Yu , Yung-Soo Kim , Myeon-Kyun Cho
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04L27/0008 , H04B7/0434 , H04B7/0619 , H04B7/063 , H04B7/0857 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/206
摘要： A multiple-input multiple-output (MIMO) wireless communication system includes a first calculator for calculating pairwise error rates (PERs) for each modulation scheme combination which comprise elements smaller than or equal to receive antennas in number; a second calculator for calculating symbol error rates (SERs) for the each modulation scheme combination using the PERs; a converter for converting the SERs to effective signal to noise ratios (SNRs); and a determiner for determining one among sets of effective SNR per stream acquired from the modulation scheme combinations, as a final effective SNR per stream.
摘要翻译：多输入多输出（MIMO）无线通信系统包括：第一计算器，用于针对每个调制方案组合计算成对误差率（PERs），所述组合包括小于或等于接收天线数量的元件; 用于使用PERs来计算每个调制方案组合的符号错误率（SER）的第二计算器; 用于将SER转换为有效信噪比（SNR）的转换器; 以及确定器，用于确定从调制方案组合获取的每个流的有效SNR集合中的一个，作为每个流的最终有效SNR。

30. 发明授权

US07995688B2 Channel estimation and ICI cancellation for OFDM 有权
标题翻译： OFDM的信道估计和ICI消除
公开(公告)号：US07995688B2
公开(公告)日：2011-08-09
申请号：US12073687
申请日：2008-03-07
申请人： Zhihong Hong , Liang Zhang , Louis Thibault
发明人： Zhihong Hong , Liang Zhang , Louis Thibault
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04L25/03821 , H04L25/022 , H04L25/0236 , H04L25/025 , H04L25/03324 , H04L25/03828 , H04L27/2647 , H04L2025/03414 , H04L2025/0349
摘要： An iterative channel estimation and inter-carrier interference (ICI) cancellation process is provided for OFDM receivers, and more particularly for mobile OFDM receivers. The iterative process uses decision feedback to estimate both the channel gain and the ICI gains, the latter being the multiplicative gain applied to the adjacent sub-carriers. Thus the receiver performs equalization and ICI cancellation in an iterative fashion and is advantageous for estimating fast fading channels.
摘要翻译：为OFDM接收机提供迭代信道估计和载波间干扰（ICI）消除过程，更具体地针对移动OFDM接收机。迭代过程使用判决反馈来估计信道增益和ICI增益，后者是应用于相邻子载波的乘法增益。因此，接收机以迭代方式执行均衡和ICI消除，并且对于估计快速衰落信道是有利的。

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