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1. 发明授权

US06178211B1 Digital processing radio receiver with adaptive bandwidth control 有权
标题翻译：数字处理无线电接收机具有自适应带宽控制
公开(公告)号：US06178211B1
公开(公告)日：2001-01-23
申请号：US09425550
申请日：1999-10-22
申请人： J. William Whikehart , Christopher John Hagan , John William Wagner , Nicholas Lawrence Difiore , John Elliott Whitecar , James Alfred Wargnier
发明人： J. William Whikehart , Christopher John Hagan , John William Wagner , Nicholas Lawrence Difiore , John Elliott Whitecar , James Alfred Wargnier
IPC分类号： H04B1406
CPC分类号： H03G5/28 , H04B1/1036 , H04B2001/1054
摘要： A carrier-based signal is received from a tuner and is digitized to produce a digital intermediate frequency (IF) signal. Automatic gain control is applied to the carrier-based signal either prior to or after digitization. An adaptive intermediate frequency bandwidth control system detects IF signal level after channel filtering. The level is compared to a predetermined threshold having a value related to the known signal level of the AGC'ed signal which is being input to the channel filter in order to provide a measure of either 1) the presence of interfering adjacent channels, or 2) reception or a weak signal which can't be compensated for by AGC. The IF bandwidth is narrowed in either circumstance. Digital FIR or IIR filtering is used. The invention allows bandwidth switching to be done very quickly with minimal transient effects. A threshold value is selected depending upon the IF channel bandwidth being used at any given time.
摘要翻译：从调谐器接收基于载波的信号，并将其数字化以产生数字中频（IF）信号。在数字化之前或之后，对基于载波的信号应用自动增益控制。自适应中频带宽控制系统检测信道滤波后的中频信号电平。将该电平与具有与正在输入到信道滤波器的AGC信号的已知信号电平相关的值的预定阈值进行比较，以提供1）干扰相邻信道的存在或2 ）接收或由AGC无法补偿的弱信号。在任何情况下，IF带宽都变窄。使用数字FIR或IIR滤波。本发明允许以最小的瞬态效应非常快地完成带宽切换。根据在任何给定时间使用的IF信道带宽来选择阈值。

2. 发明授权

US6058148A Digital processing radio receiver with adaptive bandwidth control 失效
标题翻译：数字处理无线电接收机具有自适应带宽控制
公开(公告)号：US6058148A
公开(公告)日：2000-05-02
申请号：US883692
申请日：1997-06-27
申请人： J. William Whikehart , Christopher John Hagan , John William Wagner , Nicholas Lawrence Difiore , John Elliott Whitecar , James Alfred Wargnier
发明人： J. William Whikehart , Christopher John Hagan , John William Wagner , Nicholas Lawrence Difiore , John Elliott Whitecar , James Alfred Wargnier
IPC分类号： H03G5/28 , H04B1/10
CPC分类号： H03G5/28 , H04B1/1036 , H04B2001/1054
摘要： An adaptive intermediate frequency bandwidth control system detects IF signal levels both before and after channel filtering. The two levels are compared to provide a measure of the presence of interfering adjacent channels. This measure is compared to a programmable threshold and the IF bandwidth is narrowed if any interferers are detected. Digital FIR or IIR filtering is used. The invention allows bandwidth switching to be done very quickly with minimal transient effects. A difference threshold is selected depending upon the IF channel bandwidth being used at any given time.
摘要翻译：自适应中频带宽控制系统在信道滤波前后检测中频信号电平。比较两个级别以提供干扰相邻信道的存在的度量。将此措施与可编程阈值进行比较，如果检测到任何干扰源，则IF带宽变窄。使用数字FIR或IIR滤波。本发明允许以最小的瞬态效应非常快地完成带宽切换。根据在任何给定时间使用的IF信道带宽来选择差分阈值。

3. 发明授权

US06256358B1 Digital signal processing architecture for multi-band radio receiver 失效
标题翻译：用于多频无线电接收机的数字信号处理架构
公开(公告)号：US06256358B1
公开(公告)日：2001-07-03
申请号：US09049355
申请日：1998-03-27
申请人： J. William Whikehart , James Alfred Wargnier , Bradley Anderson Ballard , Nicholas Lawrence Difiore , John Elliott Whitecar , Christopher John Hagan
发明人： J. William Whikehart , James Alfred Wargnier , Bradley Anderson Ballard , Nicholas Lawrence Difiore , John Elliott Whitecar , Christopher John Hagan
IPC分类号： H04H106
CPC分类号： H03D5/00 , H03D3/006 , H03D3/007 , H03D7/165 , H03D2200/005 , H03D2200/0052 , H03D2200/0054 , H03D2200/0082
摘要： A digital signal processing architecture for an audio system combines multiple functions in programmable and reconfigurable blocks to achieve an efficient use of hardware and chip area. AM, FM, and audio functions can be performed using the same reconfigurable hardware while taking into account the different sample rates and processing functions required for each.
摘要翻译：用于音频系统的数字信号处理架构将可编程和可重构块中的多个功能组合以实现硬件和芯片区域的有效使用。 AM，FM和音频功能可以使用相同的可重配置硬件来执行，同时考虑到每个硬件所需的不同采样率和处理功能。

4. 发明授权

US06178314B1 Radio receiver with adaptive bandwidth controls at intermediate frequency and audio frequency sections 失效
标题翻译：无线电接收机，具有中频和音频部分的自适应带宽控制
公开(公告)号：US06178314B1
公开(公告)日：2001-01-23
申请号：US08883646
申请日：1997-06-27
申请人： J. William Whikehart , Nicholas Lawrence Difiore , John Elliott Whitecar
发明人： J. William Whikehart , Nicholas Lawrence Difiore , John Elliott Whitecar
IPC分类号： H04B118
CPC分类号： H03G5/24 , H03G5/005 , H04B1/1036
摘要： An adaptive bandwidth control system optimizes radio reception by controlling intermediate frequency bandwidth and baseband bandwidth to reduce both interference and noise while remaining compatible with AM broadcasts using the NRSC-1 standard. An adaptive IF filter detects the presence of interfering undesired sources. The IF bandwidth is narrowed if any interferers are detected. Simultaneously, the frequency content of the demodulated baseband signal is analyzed to control an optimal baseband bandwidth so that any frequencies containing substantially only noise are eliminated.
摘要翻译：自适应带宽控制系统通过控制中频带宽和基带带宽来优化无线电接收，以减少干扰和噪声，同时使用NRSC-1标准与AM广播兼容。自适应中频滤波器检测是否存在干扰不必要的信号源。如果检测到任何干扰源，则IF带宽变窄。同时，分析解调的基带信号的频率内容以控制最佳的基带带宽，从而消除仅包含噪声的任何频率。

5. 发明授权

US06968204B2 Narrow band and spread spectrum communication system for a vehicle 失效
标题翻译：用于车辆的窄带和扩频通信系统
公开(公告)号：US06968204B2
公开(公告)日：2005-11-22
申请号：US10040854
申请日：2001-12-28
申请人： J. William Whikehart , John Elliott Whitecar , Nicholas Lawrence Difiore
发明人： J. William Whikehart , John Elliott Whitecar , Nicholas Lawrence Difiore
IPC分类号： H04B1/40 , H04B1/707 , H04B1/38
CPC分类号： H04B1/707 , H04B1/406
摘要： A vehicle communication system uses one or more components to process both narrow band signals and spread spectrum signals. A spread spectrum-like signal is generated from the narrow band signal. The spread spectrum-like signal is processed as a spread spectrum signal.
摘要翻译：车辆通信系统使用一个或多个组件来处理窄带信号和扩频信号。从窄带信号产生扩频样信号。扩频样信号作为扩频信号进行处理。

6. 发明授权

US07072431B2 Clock timing recovery using arbitrary sampling frequency 有权
标题翻译：使用任意采样频率的时钟定时恢复
公开(公告)号：US07072431B2
公开(公告)日：2006-07-04
申请号：US10284231
申请日：2002-10-30
申请人： Vincent Wang , J. William Whikehart , John Elliott Whitecar
发明人： Vincent Wang , J. William Whikehart , John Elliott Whitecar
IPC分类号： H04L7/00
CPC分类号： H04L25/062 , H04H20/16 , H04H40/27 , H04H2201/13 , H04L7/0004 , H04L7/0331
摘要： A bit timing signal is regenerated from an encoded digital signal in a receiver using a predetermined sample rate Fs. An input pulse signal is generated in response to predetermined transitions of the encoded digital signal. A clock count signal is generated having a variable clock period according to cyclical counting of the clock count signal up to a count value S at the predetermined sample rate, the count value alternating between an upper value Su and a lower value Sl so that the variable clock period has an average length substantially equal to a data bit period of the encoded digital signal. The clock count signal is synchronized with the encoded digital signal by 1) counting the input pulse signals to generate a pulse count, 2) counting sampling periods between successive input pulse signals to generate a sample count, and 3) generating a sync signal if the pulse count is greater than a pulse threshold and the sample count is greater than a sample threshold. The clock count signal and the pulse count are reset in response to the sync signal.
摘要翻译：使用预定采样率F S从接收机中的编码数字信号再生位定时信号。响应于编码数字信号的预定转换而产生输入脉冲信号。产生具有可变时钟周期的时钟计数信号，该可变时钟周期根据时钟计数信号的周期性计数直到预定采样率的计数值S，该计数值在上限值S 和使得可变时钟周期具有基本上等于编码数字信号的数据比特周期的平均长度的较低值S <1>。时钟计数信号与编码的数字信号同步1）对输入脉冲信号进行计数以产生脉冲计数; 2）对连续的输入脉冲信号之间的采样周期进行计数以产生采样计数，以及3）产生同步信号，如果脉冲计数大于脉冲阈值，并且样本计数大于采样阈值。响应于同步信号，时钟计数信号和脉冲计数被复位。

7. 发明授权

US07099644B2 Beamsteering control system for a vehicle radio receiver 有权
公开(公告)号：US07099644B2
公开(公告)日：2006-08-29
申请号：US10040857
申请日：2001-12-28
申请人： J. William Whikehart , Darby Edward Hadley , John Elliott Whitecar
发明人： J. William Whikehart , Darby Edward Hadley , John Elliott Whitecar
IPC分类号： H04B1/06
CPC分类号： H01Q3/26 , H01Q1/32 , H01Q21/28 , H04B7/0837 , H04B7/12 , H04L1/06 , H04L1/20
摘要： A vehicle radio receiver has a beamsteering control system with two signal paths. One signal path generates an audio signal in response to incoming radio signals. Another signal path generates a test signal in response to the incoming radio signals. The audio signal is adjusted in response to the test signal.

8. 发明授权

US06459796B1 AM stereo receiver with reduced distortion 失效
标题翻译： AM立体声接收机，减少失真
公开(公告)号：US06459796B1
公开(公告)日：2002-10-01
申请号：US09104603
申请日：1998-06-24
申请人： John Elliott Whitecar , Frank Michael Hirschenberger , J. William Whikehart
发明人： John Elliott Whitecar , Frank Michael Hirschenberger , J. William Whikehart
IPC分类号： H04H500
CPC分类号： H04H20/49
摘要： Left and right stereo audio information is reproduced from a compatible quadrature amplitude modulation (C-QUAM) broadcast using two separate modes of detection. In the first mode, a true C-QUAM detection is performed when the signal being received has a high level of stereo difference information. In the second mode, a synchronous detection approximation is used which avoids generating an envelope signal or calculating a cosine correction factor as in true C-QUAM decoding. The second mode is used when over-modulation is present in the received signal.
摘要翻译：使用两种独立的检测模式，从兼容的正交幅度调制（C-QUAM）广播中再现左和右立体声音频信息。在第一模式中，当正在接收的信号具有高水平的立体声差分信息时，执行真正的C-QUAM检测。在第二模式中，使用同步检测近似，其避免产生包络信号或计算如真正的C-QUAM解码中的余弦校正因子。当接收信号中存在过调制时，使用第二种模式。

9. 发明授权

US07149265B2 Timing recovery loop with non-integer length 有权
标题翻译：具有非整数长度的定时恢复环路
公开(公告)号：US07149265B2
公开(公告)日：2006-12-12
申请号：US10440497
申请日：2003-05-16
申请人： Yung Da Wang , J. William Whikehart , John Elliott Whitecar
发明人： Yung Da Wang , J. William Whikehart , John Elliott Whitecar
IPC分类号： H04L7/00
CPC分类号： H04H40/45 , H04H2201/13 , H04L7/0331 , H04L7/042
摘要： A timing signal is regenerated from an encoded digital signal having a data clock frequency Rb in a receiver using a predetermined sample rate Fs, wherein the data clock period 1/Rb is not an integer multiple of the predetermined sample period 1/Fs. The method comprises generating an input pulse signal in response to the encoded digital signal. Each of the input pulse signals is accumulated in a predetermined delay element which stores an accumulated value, wherein the predetermined delay element is in a delay loop including N delay elements each having a respective accumulated value. The accumulated values are circulated within the delay loop by shifting at each of the sample periods according to a predetermined shift sequence, the predetermined shift sequence including a plurality of single shifts and at least one other shift size to provide a number of shifts N+δ during a cycle of N sample periods. A synchronization pulse is generated in response to the accumulated values and a predetermined threshold. A counter is operated to output the timing signal in response to the predetermined sample rate Fs, the counter having a variable counter period according to a predetermined counter sequence. The variable counter period has an average over time corresponding to the data clock period 1/Rb. The counter is reset in response to the synchronization pulse (if synchronization becomes necessary).
摘要翻译：定时信号从接收机中具有数据时钟频率R BAT的编码数字信号再生，使用预定的采样率F S s，其中数据时钟周期1 / R b 不是预定采样周期1 / F的整数倍。该方法包括响应于编码的数字信号产生输入脉冲信号。每个输入脉冲信号被累积在存储累加值的预定延迟元件中，其中预定延迟元件处于包括具有相应累积值的N个延迟元件的延迟环中。通过根据预定的移位序列在每个采样周期内移位，累积值在延迟环路内循环，该预定移位序列包括多个单移位和至少一个其它移位大小以提供多个移位N + 在N个采样周期的周期。响应于累积值和预定阈值产生同步脉冲。操作计数器以响应于预定采样率F SUB输出定时信号，计数器根据预定的计数器顺序具有可变计数器周期。可变计数器周期具有对应于数据时钟周期1 / R b1的时间的平均值。响应于同步脉冲（如果需要同步），计数器被复位。

10. 发明授权

US06952587B2 Antenna beam steering responsive to receiver and broadcast transmitter 有权
标题翻译：响应于接收机和广播发射机的天线波束转向
公开(公告)号：US06952587B2
公开(公告)日：2005-10-04
申请号：US10058482
申请日：2002-01-28
申请人： J. William Whikehart , Jack Harold King , John Elliott Whitecar , Michael Chrysochoos , Philip Mark Bator , Richard Zerod
发明人： J. William Whikehart , Jack Harold King , John Elliott Whitecar , Michael Chrysochoos , Philip Mark Bator , Richard Zerod
IPC分类号： G01S19/25 , H04W64/00 , H04Q7/20 , H04B7/14
CPC分类号： H04W64/00
摘要： A method of controlling an antenna signal combiner in a vehicle having multiple antenna elements, a navigational system and a receiver comprising the steps of receiving signals from at least one transmitter, determining first position coordinates of the vehicle using the navigational system, determining second position coordinates of the at least one transmitter, and combining signals from the multiple antenna elements to steer an antenna beam from the first position coordinates to the second position coordinates.
摘要翻译：一种在具有多个天线元件的车辆中控制天线信号组合器的方法，导航系统和接收机，包括以下步骤：从至少一个发射机接收信号，使用导航系统确定车辆的第一位置坐标，确定第二位置坐标并且组合来自所述多个天线元件的信号以将天线波束从所述第一位置坐标引导到所述第二位置坐标。

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