公开(公告)号：US07117520B2

公开(公告)日：2006-10-03

申请号：US10372618

申请日：2003-02-24

申请人： John Sidney Stewart

发明人： John Sidney Stewart

IPC分类号： H04N7/173

CPC分类号： H04N7/173 ,  H04L12/2801 ,  H04N7/104 ,  H04N21/6118 ,  H04N21/6168 ,  H04W4/18 ,  H04W88/06

摘要： A wireless communications system comprises a first splitter separating at least two signals, a wireless circuit for processing a first signal as a wireless signal and a combiner connected to the wireless circuit and the splitter, combining the two signals and transmitting the signals into a service area. The wireless communications system further comprises a second splitter separating the wireless signal from a second signal, and a transmitter for broadcasting the wireless signal.

摘要翻译： 无线通信系统包括分离至少两个信号的第一分离器，用于处理作为无线信号的第一信号的无线电路和连接到无线电路和分离器的组合器，组合两个信号并将信号发送到服务区 。 无线通信系统还包括将无线信号与第二信号分开的第二分路器和用于广播无线信号的发射机。

公开(公告)号：US5912907A

公开(公告)日：1999-06-15

申请号：US640883

申请日：1996-05-08

申请人： John Sidney Stewart

发明人： John Sidney Stewart

IPC分类号： H03M13/15 ,  H03M13/29 ,  H03M13/41 ,  H04L1/00 ,  H03M13/00

CPC分类号： H04L1/0038 ,  H03M13/15 ,  H03M13/29 ,  H03M13/41 ,  H03M13/6325 ,  H03M13/6508 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0046 ,  H04L1/0054

摘要： A satellite signal receiver includes an input demodulator followed by a Viterbi decoder and a Reed-Solomon decoder. A received signal is encoded with information including error-representative information, and exhibits an error correction code rate which is a function of the power level of a satellite transmitted signal. The demodulator produces control signals representing the presence or absence of synchronism with the received signal, and signal quality (e.g., signal-to-noise ratio). The Reed-Solomon decoder produces a control signal indicating whether or not error detection and correction is occurring properly. These control signals are sensed by a control network to change the code rate of the Viterbi decoder if necessary.

摘要翻译： PCT No.PCT / US93 / 11338 Sec。 371日期：1996年5月8日 102（e）日期1996年5月8日PCT提交1993年11月22日PCT公布。 WO95 / 15033 PCT出版物 日期：1995年6月1日卫星信号接收机包括一个输入解调器，后面是维特比解码器和里德 - 索罗门解码器。 接收到的信号用包括错误代表信息的信息进行编码，并且表现出作为卫星发送信号的功率电平的函数的纠错码率。 解调器产生表示与接收信号同步的存在或不存在以及信号质量（例如，信噪比）的控制信号。 Reed-Solomon解码器产生一个控制信号，指示错误检测和纠正是否正确发生。 如果需要，这些控制信号由控制网络感测以改变维特比解码器的码率。

公开(公告)号：US5739874A

公开(公告)日：1998-04-14

申请号：US579782

申请日：1995-12-28

申请人： David Mark Badger ,  John Sidney Stewart ,  Michael Anthony Pugel

发明人： David Mark Badger ,  John Sidney Stewart ,  Michael Anthony Pugel

IPC分类号： H04N5/44 ,  H03J1/00 ,  H03J7/02 ,  H03L7/107 ,  H04B1/26 ,  H04N5/455 ,  H04N5/46 ,  H04N5/50 ,  H04N7/20

CPC分类号： H03L7/0805 ,  H03J1/005 ,  H03L7/107

摘要： An economical tuning system for a digital satellite television receiver includes a phase locked loop (PLL) tuning control IC of the which is normally used in a tuning system of a conventional terrestrial broadcast or cable television reciever to control the frequency of the local oscillator (LO). Unfortunately, the PLL IC is only capable of changing the frequency of the LO in relatively large steps. As a result, the operation of a carrier recovery loop which demodulates the digitally encoded IF signal produced by the tuner may be interrupted during a fine tuning mode because the carrier recovery loop may not be able to track frequency changes of the LO. To reduce such possibility, the integrator filter associated with the PLL IC is modified to decrease the rate of change of the LO frequency during the fine tuning mode.

摘要翻译： 用于数字卫星电视接收机的经济调谐系统包括锁相环（PLL）调谐控制IC，其通常用于常规地面广播或有线电视接收机的调谐系统中，以控制本地振荡器（LO ）。 不幸的是，PLL IC只能在相对较大的步骤中改变LO的频率。 因此，由于载波恢复环路可能无法跟踪LO的频率变化，所以在微调模式期间，解调由调谐器产生的数字编码的IF信号的载波恢复环路的操作可能被中断。 为了减少这种可能性，修改了与PLL IC相关联的积分滤波器，以在微调模式期间降低LO频率的变化率。

公开(公告)号：US5671253A

公开(公告)日：1997-09-23

申请号：US501361

申请日：1995-07-12

申请人： John Sidney Stewart

发明人： John Sidney Stewart

IPC分类号： H04N21/242 ,  H03M13/23 ,  H04L27/22 ,  H04L27/227 ,  H04L27/233 ,  H04L27/38 ,  H04N5/455 ,  H04N5/46 ,  H04N21/2383 ,  H04N21/43 ,  H04N21/438 ,  H04L27/06 ,  H04L7/00

CPC分类号： H04L1/0057 ,  H04L1/0046 ,  H04L1/0054 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/20 ,  H04L1/208 ,  H04L27/0008 ,  H04L27/2332 ,  H04L27/3809 ,  H04L27/3854 ,  H04N21/2383 ,  H04N21/4382 ,  H04N7/10 ,  H04L7/0334

摘要： An adaptive receiver includes an adaptive demodulator and an adaptive decoder for providing demodulated and decoded output data from a video signal encoded for satellite, terrestrial or cable transmission. The demodulator recovers demodulated output data by using an adaptive timing recovery network and an adaptive carrier recovery network that incorporates a selectable slicer network. In addition, an Automatic Gain Control network within the demodulator provides a gain control output as a function of a difference between signals produced both prior to and following the slicer. The demodulator may also incorporate a signal quality detector that uses carrier recovery network signals to provide an estimate of the error in the demodulated output data. The decoder produces a Viterbi decoded output from the demodulated output data by using a selectable code rate Viterbi decoder.

摘要翻译： 自适应接收机包括自适应解调器和自适应解码器，用于从编码用于卫星，地面或电缆传输的视频信号提供解调和解码的输出数据。 解调器通过使用自适应定时恢复网络和包含可选择的分片器网络的自适应载波恢复网络来恢复解调的输出数据。 此外，解调器内的自动增益控制网络提供增益控制输出作为在切片器之前和之后产生的信号之间的差异的函数。 解调器还可以包括使用载波恢复网络信号来提供解调输出数据中的误差的估计的信号质量检测器。 解码器通过使用可选码率维特比解码器从解调的输出数据产生维特比解码输出。

公开(公告)号：US07685622B2

公开(公告)日：2010-03-23

申请号：US10494233

申请日：2001-11-01

申请人： John Sidney Stewart

发明人： John Sidney Stewart

IPC分类号： H04N7/18 ,  H04N7/173 ,  H04N7/16

CPC分类号： H04N7/106 ,  H04N5/40 ,  H04N5/44 ,  H04N5/50 ,  H04N21/2143 ,  H04N21/4263 ,  H04N21/436 ,  H04N21/4383 ,  H04N21/6112

摘要： A television signal receiving system is operative to optimally tune to one or a plurality of television channels and provide one or plurality of optimum television channel signals to one or a plurality of television signal receivers. The television signal receivers are operative to request a particular channel of a television signal processor. The television signal processor is coupled to an antenna array. Television signals from the antenna array are processed in accordance with the principles of the subject invention to provide optimum television channel signals. The optimum television channel signals are demodulated then remodulated before being distributed to the various television signal receivers.

摘要翻译： 电视信号接收系统可操作以最佳地调谐到一个或多个电视频道，并向一个或多个电视信号接收机提供一个或多个最佳电视频道信号。 电视信号接收器可操作以请求电视信号处理器的特定频道。 电视信号处理器耦合到天线阵列。 根据本发明的原理处理来自天线阵列的电视信号以提供最佳的电视频道信号。 解调最优的电视频道信号，然后在分配给各种电视信号接收机之前重新调制。

公开(公告)号：US20090103636A1

公开(公告)日：2009-04-23

申请号：US12085502

申请日：2005-12-01

申请人： John Sidney Stewart

发明人： John Sidney Stewart

IPC分类号： H04N11/02

CPC分类号： H03M13/6566 ,  H03M13/1105 ,  H03M13/1137

摘要： The disclosed embodiments relate to an apparatus and method for decoding signals in a receiver, such as signals using low density parity check error correction. The apparatus includes a link circuit. The link circuit may include a first memory, a first and second processing block, and also include a first shift circuit for shifting data before entering one of the processing blocks and a second shift circuit for reversing the first shift after exiting the processing block. The link circuit may also include a second memory used for intermediate storage and shared by the first and second processing block. The method includes reading data from a memory, shifting the data prior to processing, processing the data, and then reverse shifting the data prior to writing it back to the memory.

摘要翻译： 所公开的实施例涉及用于对接收机中的信号进行解码的装置和方法，例如使用低密度奇偶校验错误校正的信号。 该装置包括链路电路。 链路电路可以包括第一存储器，第一和第二处理块，并且还包括用于在进入处理块之一之前移位数据的第一移位电路和用于在退出处理块之后反转第一移位的第二移位电路。 链路电路还可以包括用于中间存储并由第一和第二处理块共享的第二存储器。 该方法包括从存储器读取数据，在处理之前移动数据，处理数据，然后在将数据写回存储器之前将数据反向移位。

公开(公告)号：US06275554B1

公开(公告)日：2001-08-14

申请号：US09350880

申请日：1999-07-09

申请人： Aaron Reel Bouillet ,  John Sidney Stewart

发明人： Aaron Reel Bouillet ,  John Sidney Stewart

IPC分类号： H04L2536

CPC分类号： H04N21/2383 ,  H04L7/044 ,  H04L7/08 ,  H04N21/4382

摘要： A receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information includes an input analog-to-digital converter (19) for producing a digital datastream. A symbol timing recovery and segment sync recovery network (24; FIG. 3, 4) develops a properly timed sampling clock for the digital converter (19). The symbol timing recovery network (310) responds to an output from the segment sync recovery network (328), which in turn responds to an equalized signal from an adaptive channel equalizer (34). A controlled oscillator (336) generates the sampling clock for the digital converter. A control network (340, 344, 348; FIG. 3) shifts the frequency range of the oscillator to maintain desired linear operation to enhance symbol timing acquisition.

摘要翻译： 一种用于处理包含地面广播高分辨率电视信息的VSB调制信号的接收机包括用于产生数字数据流的输入模拟 - 数字转换器（19）。 符号定时恢复和段同步恢复网络（24;图3，4）为数字转换器（19）开发适当定时的采样时钟。 符号定时恢复网络（310）响应来自段同步恢复网络（328）的输出，其响应于来自自适应信道均衡器（34）的均衡信号。 受控振荡器（336）产生数字转换器的采样时钟。 控制网络（340,344,348;图3）移动振荡器的频率范围以维持期望的线性操作以增强符号定时获取。

公开(公告)号：US5898900A

公开(公告)日：1999-04-27

申请号：US798770

申请日：1997-02-11

申请人： Kurt Joseph Richter ,  Michael Anthoney Pugel ,  John Sidney Stewart

发明人： Kurt Joseph Richter ,  Michael Anthoney Pugel ,  John Sidney Stewart

IPC分类号： H04N5/44 ,  H04N7/20

CPC分类号： H04N5/4446 ,  H04H40/90 ,  H04N21/6143 ,  H04N7/20 ,  H04N5/4401

摘要： A tuner of for a digital satellite television receiver comprises a single conversion stage which produces an IF signal at a low enough frequency to permit a SAW filter to be used to perform symbol shaping as well as the normal IF filtering function. The local oscillator is controlled by a phase locked loop tuning control IC normally used to control the local oscillator of a tuner of a conventional broadcast or cable television receiver. In an exemplary embodiment for tuning RF signals provided by a block converter in the 950 to 1450 mHz frequency range, the IF has a center frequency of 140 mHz. A lithium tantalate SAW filter is used in order to minimize shift of the IF center frequency with temperature and to provide the required relative IF bandwidth (i.e., the width of the IF passband divided by the IF center frequency).

摘要翻译： 用于数字卫星电视接收机的调谐器包括单个转换级，其以足够低的频率产生IF信号，以允许SAW滤波器用于执行符号整形以及正常IF滤波功能。 本地振荡器由通常用于控制传统广播或有线电视接收机的调谐器的本地振荡器的锁相环调谐控制IC控制。 在用于调谐在950至1450mHz频率范围内由块转换器提供的RF信号的示例性实施例中，IF具有140mHz的中心频率。 使用钽酸锂SAW滤波器以便最小化IF中心频率随温度的偏移并提供所需的相对IF带宽（即，IF通带的宽度除以IF中心频率）。

公开(公告)号：US5717471A

公开(公告)日：1998-02-10

申请号：US501752

申请日：1995-07-12

申请人： John Sidney Stewart

发明人： John Sidney Stewart

IPC分类号： H03M13/23 ,  H03M13/41 ,  H04L27/00 ,  H04L27/38 ,  H04N5/44 ,  H04N5/455 ,  H04N5/46 ,  H04N21/2383 ,  H04N21/438 ,  H04N9/68

CPC分类号： H03M13/23 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/6362 ,  H03M13/6502 ,  H03M13/6505 ,  H04L27/0008 ,  H04N5/4401

摘要： A Digital signal processor selectively demodulates and decodes signals received from multiple types of transmission channels such as satellite, terrestrial and cable transmission channels. A received signal is representative of compressed digital video information such as television picture information, and is encoded in one of a plurality of coding formats (e.g., trellis or punctured codes of selectable code rate). The received signal is also modulated in one of a plurality of modulation formats (e.g., PAM, QAM or PSK). A demodulator selectively demodulates the signal modulated in one of the plurality of modulation formats, and a decoder selectively decodes the demodulated signal coded in one of the plurality of coding formats.

摘要翻译： 数字信号处理器选择性地解调和解码从诸如卫星，地面和有线传输信道的多种类型的传输信道接收的信号。 接收到的信号代表诸如电视图像信息的压缩数字视频信息，并且以多种编码格式（例如，可选码率的网格或穿孔码）之一进行编码。 所接收的信号也以多种调制格式（例如PAM，QAM或PSK）中的一种调制。 解调器选择性地解调以多种调制格式之一调制的信号，并且解码器选择性地解码以多种编码格式之一编码的解调信号。

公开(公告)号：US20090310624A1

公开(公告)日：2009-12-17

申请号：US11919199

申请日：2006-03-29

申请人： Andrew Kent Flickner ,  John Joseph Curtis, III ,  David Emery Virag ,  John Sidney Stewart

发明人： Andrew Kent Flickner ,  John Joseph Curtis, III ,  David Emery Virag ,  John Sidney Stewart

IPC分类号： H04J1/00 ,  H03M1/12

CPC分类号： H04B1/18

摘要： The disclosed embodiments relate to a system and method for receiving multiple channels in a communications receiver. The system includes a first module further including an analog to digital converter for converting an input signal to a first and second digital signal and a first processor for processing the first digital signal, and a second module further including a second processor to process the second digital signal. The method involves receiving an analog signal, converting the analog signal to a first and second digital signal, passing the first digital signal through a first interface, processing the first digital signal to a produce a first plurality of output signals, passing the second digital signal through a second interface, and processing the second digital signal to produce a second plurality of output signals.

摘要翻译： 所公开的实施例涉及用于在通信接收机中接收多个信道的系统和方法。 该系统包括第一模块，其还包括用于将输入信号转换为第一和第二数字信号的模数转换器和用于处理第一数字信号的第一处理器，以及第二模块，还包括第二处理器，以处理第二数字信号 信号。 该方法包括接收模拟信号，将模拟信号转换为第一和第二数字信号，使第一数字信号通过第一接口，处理第一数字信号以产生第一多个输出信号，使第二数字信号 通过第二接口，并处理第二数字信号以产生第二多个输出信号。