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1.发明授权Communication device capable of estimating signal quality without synchronization pattern 失效无需同步模式即可估计信号质量的通信设备
公开(公告)号：US5715240A
公开(公告)日：1998-02-03
申请号：US642548
申请日：1996-05-03
CPC分类号： H04L7/0004 , H04L7/10
摘要： A method determines the signal usability of an adjacent channel in a multi-cell communication system without the aid of synchronization symbols. In general, a three step search is used to arrive at the adjacent channel signal quality. The first step is a coarse timing phase search. This is accomplished through a signal quality estimates (606). The second step arrives at the optimum time phase by first interpolating (608) the received signal around the time phase selected in the first step to generate additional samples. After the interpolation (608), signal quality estimates are calculated (610) for the time phases immediately surrounding the time phase found in the first step. The optimum time phase corresponds to the maximum of these quality estimates. Finally, in the third step, the signal quality estimate is calculated for the optimum time phase. This provides the adjacent channel signal quality estimate desired.
摘要翻译： 一种方法确定多小区通信系统中相邻信道的信号可用性，而不需要同步符号。 通常，使用三步搜索来获得相邻信道信号质量。 第一步是粗略的时序相位搜索。 这是通过信号质量估计来实现的（606）。 第二步通过首先内插（608）在第一步骤中选择的时间相位周围的接收信号以产生附加样本，到达最佳时间阶段。 在内插（608）之后，针对在第一步骤中发现的时间段周围的时间阶段计算信号质量估计（610）。 最佳时间段对应于这些质量估计的最大值。 最后，在第三步中，针对最佳时间阶段计算信号质量估计。 这提供了期望的相邻信道信号质量估计。
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公开(公告)号：US06441786B1
公开(公告)日：2002-08-27
申请号：US09909602
申请日：2001-07-20
IPC分类号： G01S316
CPC分类号： H04B7/0842 , H01Q3/2605
摘要： A method for controlling an adaptive antenna array (50) is provided and includes receiving a plurality of signals, each signal including a series of signal data symbols (42) and signal non-data symbols (38, 40) divided into symbol transmission units with the signal non-data symbols (38, 40) disposed among the signal data symbols (42) in each unit and each signal related to the other signals of the plurality of signals as reflections of an original signal. The method also includes separating the signal non-data symbols (38, 40) from the signal data symbols (42), and comparing the signal non-data symbols (38, 40) to a set of known non-data symbols. The method further includes determining a set of weights according to the comparison of the signal non-data symbols (38, 40) to the set of known non-data symbols, the weights to be combined with the signal data values (42) to limit the effect of interference on the signal data symbols (42). An adaptive antenna array (50) is also provided including a weight calculator (62) including a program which controls the weight calculator (62) to perform the comparing (88, 90) and determining steps (94) of the method discussed above.
摘要翻译： 提供了一种用于控制自适应天线阵列（50）的方法，包括接收多个信号，每个信号包括一系列信号数据符号（42）和信号非数据符号（38,40），被分成符号传输单元， 设置在每个单元中的信号数据符号（42）中的信号非数据符号（38,40），以及与多个信号的其他信号相关的每个信号作为原始信号的反射。 该方法还包括从信号数据符号（42）中分离信号非数据符号（38,40），以及将信号非数据符号（38,40）与一组已知的非数据符号进行比较。 该方法还包括根据信号非数据符号（38,40）与所述已知非数据符号集合的比较来确定一组权重，要与信号数据值（42）组合的权重以限制 干扰对信号数据符号（42）的影响。 还提供了自适应天线阵列（50），其包括权重计算器（62），该权重计算器（62）包括控制权重计算器（62）执行上述方法（88,90）和确定步骤（94）的程序。
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3.发明授权公开(公告)号：US07471734B2
公开(公告)日：2008-12-30
申请号：US10131429
申请日：2002-04-24
IPC分类号： H04L27/00
CPC分类号： H04L1/0618 , H04L25/03178 , H04L2025/03375 , H04L2025/03477 , H04L2025/03796
摘要： This invention extends Alamouti's scheme for wideband TDMA systems; it then works in conjunction with time-domain equalization. In fact, the present invention envisages time-domain DFE or MLSE equalization (which is more robust than linear frequency-domain equalization) via the use of a training mid-amble to separate adjacent sub-blocks; this mid-amble is used in equalizer training and its direct and inter-symbol interference contributions to the received signal, are subtractively eliminated to facilitate the detection process itself. This approach may be applied to all systems in time-dispersive propagation media, where the burst or slot length is short enough that the fading can be considered time-invariant over its duration.
摘要翻译： 本发明扩展了用于宽带TDMA系统的Alamouti方案; 然后它与时域均衡结合起来。 事实上，本发明设想通过使用训练中间码来分离相邻子块的时域DFE或MLSE均衡（其比线性频域均衡更鲁棒）; 这种中间码头被用于均衡器训练，并且对接收信号的直接和符号间干扰贡献被减去，以便于检测过程本身。 这种方法可以应用于时分散传播介质中的所有系统，其中突发或时隙长度足够短，使得衰落在其持续时间内被认为是时间不变的。
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4.发明授权Method and apparatus for producing a usable signal from received diverse modulated signals 失效用于从接收到的不同调制信号产生可用信号的方法和装置
公开(公告)号：US5440590A
公开(公告)日：1995-08-08
申请号：US143589
申请日：1993-11-01
CPC分类号： H04B7/0808 , H04B7/10 , H04L1/06
摘要： A diversity receiver that receives diverse modulated signals may produce a usable signal from the received modulated signals in the following manner. Two modulated signals, each including a desired component and an undesired component, are received by the diversity receiver, wherein each desired component includes an originally transmitted signal and each undesired component includes noise and interference. The diversity receiver estimates each desired and undesired component and produces the usable signal based on the estimated desired components and the estimated undesired components.
摘要翻译： 接收不同调制信号的分集接收机可以以下列方式从接收到的调制信号产生可用信号。 每个包含期望分量和不期望分量的两个调制信号由分集接收机接收，其中每个期望分量包括最初传输的信号，并且每个非期望分量包括噪声和干扰。 分集接收器估计每个期望的和不期望的分量，并且基于估计的期望分量和所估计的不期望的分量产生可用信号。
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5.发明授权Method and apparatus for compensation of imbalance in zero-if downconverters 失效用于补偿零 - 如果下变频器的不平衡的方法和装置
公开(公告)号：US5263196A
公开(公告)日：1993-11-16
申请号：US615107
申请日：1990-11-19
申请人： Steven C. Jasper
发明人： Steven C. Jasper
CPC分类号： H03D1/2245 , H04B1/30 , H04L5/06 , H03D3/006 , H03D3/007
摘要： To compensate the audio distortion resulting from amplitude and phase imbalance in the quadrature oscillator (103) and mixers (105, 115) in zero-IF downconverters (203), a balancing action is required. An apparatus for distortion compensation compensates for the amplitude and phase imbalance to reduce audio distortion. This is accomplished by determining (309) two gain values, which are combined (217, 227, 229) with the in-phase and quadrature components of the zero-IF downconverter (203) to compensate for the imbalance.
摘要翻译： 为了补偿由零 - IF下变频器（203）中的正交振荡器（103）和混频器（105,115）中的幅度和相位不平衡引起的音频失真，需要平衡动作。 用于失真补偿的装置补偿幅度和相位不平衡以减少音频失真。 这通过确定（309）两个增益值来实现，所述两个增益值与零中频下变频器（203）的同相和正交分量相组合（217,227,229）以补偿不平衡。
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公开(公告)号：US4785463A
公开(公告)日：1988-11-15
申请号：US771755
申请日：1985-09-03
申请人： Robert V. Janc , Steven C. Jasper
发明人： Robert V. Janc , Steven C. Jasper
摘要： A digital receiver for GPS C/A-code signals is described. The GPS receiver of the present invention provides reception and tracking a plurality of satellites simultaneously, using four separate receiver channels. The GPS receiver of the present invention includes an analog front-end for selecting and frequency translating the received GPS signal. The GPS receiver further includes a highspeed digital signal processor for recovering the despread data of the GPS signal. The baseband signal is further processed by a general purpose digital signal processor for signal search, tracking, and data recovery operations, and a microprocessor provides overall receiver control, and interface with the operator of the GPS receiver.
摘要翻译： 描述了用于GPS C / A码信号的数字接收机。 本发明的GPS接收机使用四个独立的接收机信道同时提供对多个卫星的接收和跟踪。 本发明的GPS接收机包括用于选择和频率转换接收的GPS信号的模拟前端。 GPS接收机还包括用于恢复GPS信号的解扩数据的高速数字信号处理器。 基带信号由用于信号搜索，跟踪和数据恢复操作的通用数字信号处理器进一步处理，并且微处理器提供总体接收器控制，并且与GPS接收器的操作者接口。
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公开(公告)号：US07796633B2
公开(公告)日：2010-09-14
申请号：US11383077
申请日：2006-05-12
IPC分类号： H04J3/16
CPC分类号： H04W40/12 , H04L45/123 , H04L45/125 , H04L45/24 , H04L45/3065 , H04W40/246 , H04W52/0216 , H04W52/0219 , H04W84/12 , H04W88/06 , Y02D70/142 , Y02D70/22 , Y02D70/23 , Y02D70/34
摘要： A range equalization transceiver system (100) for increasing efficiency of a continuous duty communications link includes a first transceiver (105) for transmitting data traffic over a broadband traffic channel and a second transceiver (107) for determining routing information using a discovery channel based on link quality. A controller (103) is used for interpreting routing information from the second transceiver (107) where the controller (103) selects a transmitting scheme based on data traffic conditions on both the broadband traffic channel and link quality channel for sending data over a wireless network.
摘要翻译： 用于提高连续工作通信链路效率的量程均衡收发机系统（100）包括用于通过宽带业务信道发送数据业务的第一收发机（105）和用于基于基于 链接质量。 控制器（103）用于解释来自第二收发器（107）的路由信息，其中控制器（103）基于宽带业务信道上的数据业务条件和通过无线网络发送数据的链路质量信道来选择发送方案 。
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公开(公告)号：US07489733B2
公开(公告)日：2009-02-10
申请号：US11108291
申请日：2005-04-18
CPC分类号： H04L25/0236 , H04L27/2647
摘要： A receiver configured for: a) receiving (410) a first OFDM symbol and generating a plurality of demodulated symbols for the first OFDM symbol; b) generating (420) decoder output code symbols corresponding to a subset of the plurality of demodulated symbols; c) determining (430) that a set of the decoder output code symbols make up a set of reference symbols corresponding to at least a portion of the subset of the plurality of demodulated symbols; d) generating (440) the set of reference symbols; e) generating (450) a set of channel estimates based on the set of reference symbols and the at least a portion of the subset of the plurality of demodulated symbols, for use in decoding a current OFDM symbol; and f) repeating steps b-e until a channel estimate for each demodulated symbol corresponding to the first OFDM symbol has been generated.
摘要翻译： 一种接收机，被配置用于：a）接收（410）第一OFDM符号并产生用于所述第一OFDM符号的多个解调符号; b）产生（420）对应于所述多个解调符号的子集的解码器输出码符号; c）确定（430）一组解码器输出码符号组成对应于多个解调符号的子集的至少一部分的一组参考符号; d）产生（440）所述参考符号集合; e）基于参考符号集合和所述多个解调符号的子集的至少一部分来生成（450）一组信道估计，用于解码当前OFDM符号; 以及f）重复步骤b-e，直到已经产生对应于第一OFDM符号的每个解调符号的信道估计为止。
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9.发明授权Method and apparatus for determining a location of a communication unit in a wireless communication system 失效用于确定无线通信系统中的通信单元的位置的方法和装置
公开(公告)号：US6167275A
公开(公告)日：2000-12-26
申请号：US992062
申请日：1997-12-17
CPC分类号： H04W64/00
摘要： A wireless communication system (100) that includes a plurality of base sites (101-103) employs a method and apparatus for determining a location of a communication unit (107) in the system. Upon transmission of an information signal (109) by the communication unit, each of the base sites receives the transmitted information signal. A serving base site (e.g., 103) determines a stream of information symbols from the information signal, derives timing information based on the information signal and the stream of information symbols, and conveys the stream of information symbols preferably to at least two non-serving base sites (101-102). The non-serving base sites determine respective timing information based on the information signal received from the communication unit and the stream of information symbols received from the serving base site. The location of the communication unit is then determined by either a base site or a stand-alone processing device (105) based on the serving base site's and non-serving base site's timing information.
摘要翻译： 包括多个基站（101-103）的无线通信系统（100）采用用于确定系统中的通信单元（107）的位置的方法和装置。 在由通信单元发送信息信号（109）时，每个基站接收发送的信息信号。 服务基站（例如，103）从信息信号确定信息符号流，基于信息信号和信息符号流导出定时信息，并将信息符号流优选地传送至至少两个不服务 基地（101-102）。 非服务基站基于从通信单元接收的信息信号和从服务基站接收到的信息符号流来确定相应的定时信息。 然后，由基站或独立处理设备（105）基于服务基站和非服务基站的定时信息来确定通信单元的位置。
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10.发明授权
公开(公告)号：US5553102A
公开(公告)日：1996-09-03
申请号：US348027
申请日：1994-12-01
CPC分类号： H04B7/0848
摘要： In a diversity reception communication system (200), a method is provided for recovering data symbols (213) from a transmitted signal. Multiple signals representing the transmitted signal are received via corresponding multiple reception paths (201, 202). For each reception path, values are determined for noise (206), channel quality (207), and for a weighting factor (209) as a function of the channel quality. The signals are processed using diversity combining (212) which includes the weighting factor (209) for each reception path, to provide a resultant signal that more likely represents the transmitted signal than any of the received signals alone. The data symbols (213) are recovered from the resultant signal.
摘要翻译： 在分集接收通信系统（200）中，提供了从发送信号中恢复数据符号（213）的方法。 通过相应的多个接收路径（201,202）接收表示发送信号的多个信号。 对于每个接收路径，确定噪声（206），信道质量（207）和作为信道质量的函数的加权因子（209）的值。 使用包括每个接收路径的加权因子（209）的分集组合（212）来处理信号，从而仅提供比任何接收信号更可能地表示发送信号的结果信号。 从结果信号中恢复数据符号（213）。
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