公开(公告)号：US5440590A

公开(公告)日：1995-08-08

申请号：US143589

申请日：1993-11-01

申请人： Mark A. Birchler ,  Steven C. Jasper ,  Karen A. Brailean ,  Timothy J. Wilson

发明人： Mark A. Birchler ,  Steven C. Jasper ,  Karen A. Brailean ,  Timothy J. Wilson

IPC分类号： H04B7/08 ,  H04B7/10 ,  H04L1/06 ,  H04L1/02

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。

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

IPC分类号： H03D1/22 ,  H03D3/00 ,  H04B1/30 ,  H04L5/06 ,  H04B1/26

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。

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

IPC分类号： G01S1/00 ,  G01S5/14 ,  G01S11/10 ,  G01S19/11 ,  H04K1/00

CPC分类号： G01S19/29 ,  G01S11/10

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。

公开(公告)号：US07796633B2

公开(公告)日：2010-09-14

申请号：US11383077

申请日：2006-05-12

申请人： Mark A. Birchler ,  Jeffrey D. Bonta ,  Steven C. Jasper

发明人： Mark A. Birchler ,  Jeffrey D. Bonta ,  Steven C. Jasper

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 。

公开(公告)号：US07489733B2

公开(公告)日：2009-02-10

申请号：US11108291

申请日：2005-04-18

申请人： Colin D. Frank ,  Robert J. Corke ,  Steven C. Jasper ,  Isam R. Makhlouf

发明人： Colin D. Frank ,  Robert J. Corke ,  Steven C. Jasper ,  Isam R. Makhlouf

IPC分类号： H04K1/10 ,  H04L27/28

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。

公开(公告)号：US6167275A

公开(公告)日：2000-12-26

申请号：US992062

申请日：1997-12-17

申请人： Nicholas C. Oros ,  Steven C. Jasper ,  Mark A. Birchler

发明人： Nicholas C. Oros ,  Steven C. Jasper ,  Mark A. Birchler

IPC分类号： H04W64/00 ,  H04Q7/20

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。

公开(公告)号：US5553102A

公开(公告)日：1996-09-03

申请号：US348027

申请日：1994-12-01

申请人： Steven C. Jasper ,  Mark A. Birchler ,  Nicholas C. Oros

发明人： Steven C. Jasper ,  Mark A. Birchler ,  Nicholas C. Oros

IPC分类号： H04B7/08 ,  H04B7/10

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）。

公开(公告)号：US5487091A

公开(公告)日：1996-01-23

申请号：US106170

申请日：1993-08-13

申请人： Steven C. Jasper ,  Mark A. Birchler

发明人： Steven C. Jasper ,  Mark A. Birchler

IPC分类号： H04B7/08 ,  H04B7/10

CPC分类号： H04B7/0845

摘要： A diversity receiver that receives modulated signals may determine signal usability of the received signals in the following manner. A modulated signal that includes a desired component and an undesired component is received in each receiver branch of the diversity receiver, wherein the desired component includes an originally transmitted signal and the undesired component includes noise and interference. Each receiver branch estimates the desired and undesired components and processes the modulated signal with a channel gain/phase estimator, a complex conjugator, and a complex mixer to produce a complex output. The complex output of each receiver branch is derived independently of the undesired component and combined to produce a diversity resultant. The diversity receiver estimates the signal usability of the diversity resultant based on the estimated desired components and the estimated undesired components.

摘要翻译： 接收调制信号的分集接收机可以以下列方式确定接收信号的信号可用性。 在分集接收机的每个接收器分支中接收包括期望分量和不期望分量的调制信号，其中期望分量包括最初发送的信号，不需要的分量包括噪声和干扰。 每个接收机分支估计期望的和不期望的分量，并用信道增益/相位估计器，复共轭和复混合器处理调制信号以产生复数输出。 每个接收器分支的复数输出独立于不期望的分量被导出并且被组合以产生分集结果。 分集接收机基于估计的期望分量和估计的不期望的分量来估计分集结果的信号可用性。

公开(公告)号：US4893316A

公开(公告)日：1990-01-09

申请号：US890804

申请日：1986-07-24

申请人： Robert V. Janc ,  Steven C. Jasper ,  Lester A. Longley ,  Katherine L. Zebrose ,  William J. Turney ,  Ross J. Lillie

发明人： Robert V. Janc ,  Steven C. Jasper ,  Lester A. Longley ,  Katherine L. Zebrose ,  William J. Turney ,  Ross J. Lillie

IPC分类号： H03B27/00 ,  H03B28/00 ,  H03C3/40 ,  H03D1/22 ,  H03D3/00 ,  H03D7/16

CPC分类号： H03D3/007 ,  H03C3/40 ,  H03D1/2245 ,  H03D7/166 ,  H03B27/00 ,  H03B28/00 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D3/006

摘要： A digital radio receiver is described. The digital receiver of the present invention contemplates a digital radio receiver which operates on a received analog signal which has been converted to a digital form after preselection at the output of the antenna. The digital receiver of the present invention comprises a preselector, a high-speed analog-to-digital (A/D) converter, a digitally implemented intermediate-frequency (IF) selectivity section having an output signal at substantially baseband frequencies, and digital signal processor (DSP) circuit performing demodulation and audio filtering. The radio architecture of the present invention is programmably adaptable to virtually every known modulation scheme and is particularly suitable for implementation on integrated circuits.

摘要翻译： 描述数字无线电接收机。 本发明的数字接收机设想一种数字无线电接收机，其对接收到的模拟信号进行操作，该接收的模拟信号在天线的输出处被预选之后被转换成数字形式。 本发明的数字接收机包括预选器，高速模数（A / D）转换器，具有基本基带频率的输出信号的数字实现的中频（IF）选择部分，以及数字信号 处理器（DSP）电路执行解调和音频滤波。 本发明的无线电架构可编程地适应于几乎每个已知的调制方案，并且特别适用于集成电路上的实现。

公开(公告)号：US4701934A

公开(公告)日：1987-10-20

申请号：US771754

申请日：1985-09-03

申请人： Steven C. Jasper

发明人： Steven C. Jasper

IPC分类号： G01S1/00 ,  G01S5/14 ,  G01S11/10 ,  G01S19/30 ,  G01S19/34 ,  H04K1/00

CPC分类号： G01S19/29 ,  G01S11/10

摘要： An improved method of doppler searching in a digital GPS receiver is described. According to the principles of the present invention, an N-point fourier transform is performed on samples of a down converted GPS signal representing the entire range of Doppler-shifted GPS carrier frequencies. The magnitude of the square of each of the output samples is calculated to produce N power quantities, corresponding to N search frequencies. The power quantities for each of the N search frequencies are then summed to produce N quantities proportional to average power. The maximum of the N-power quantities indicates the presence of the corresponding GPS signal.

摘要翻译： 描述了一种在数字GPS接收机中进行多普勒搜索的改进方法。 根据本发明的原理，对表示多普勒频移的GPS载波频率的整个范围的降频转换的GPS信号的采样进行N点傅立叶变换。 计算每个输出样本的平方的大小，以产生对应于N个搜索频率的N个功率量。 然后将N个搜索频率中的每一个的功率量相加以产生与平均功率成比例的N个量。 N个功率量的最大值表示存在相应的GPS信号。