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公开(公告)号：US20180183553A1
公开(公告)日：2018-06-28
申请号：US15851463
申请日：2017-12-21
发明人： Michael Eiselt
CPC分类号： H04L5/0048 , H04B1/1653 , H04B1/715 , H04B10/50 , H04B10/50575 , H04B17/24 , H04J14/0258 , H04L5/0008 , H04L25/0228 , H04L27/2613
摘要： A method for generating a tone signal (TS) having a tone frequency, f, wherein the method comprises the following steps: supplying (S1) a binary bit stream (BBS) having a mark pattern with a supply bit rate, BR, to a signal filter unit; and filtering (S2) the supplied binary bit stream (BBS) by said signal filter unit to generate the tone signal (TS), wherein the mark pattern of the binary bit stream (BBS) supplied to said signal filter unit is adapted to minimize a ratio of the supply bit rate, BR, to the tone frequency, f, of the generated tone signal (TS).
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2.发明授权公开(公告)号：US09161145B1
公开(公告)日：2015-10-13
申请号：US14530036
申请日：2014-10-31
CPC分类号： H04B1/1653 , H04B1/1646 , H04H40/45 , H04H40/72 , H04H40/81 , H04R29/00 , H04S7/301
摘要： An audio receiver may include a mono/stereo detector that causes the audio receiver to output either a monophonic or a stereophonic signal based on a difference between a pilot energy signal and a filtered pilot energy signal. The audio receiver includes a filter that filters the pilot energy signal to generate a filtered pilot energy signal, wherein a variable leakage factor associated with the filter is used to minimize a noise level of the filtered pilot energy signal and to reduce a response time of the audio receiver.
摘要翻译： 音频接收器可以包括单声道/立体声检测器，其使音频接收器基于导频能量信号和滤波的导频能量信号之间的差异来输出单声道或立体声信号。 音频接收器包括滤波器，其对导频能量信号进行滤波以产生经滤波的导频能量信号，其中使用与滤波器相关联的可变泄漏因子来最小化滤波后的导频能量信号的噪声电平并减少 音频接收器
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3.发明授权公开(公告)号：US08879740B1
公开(公告)日：2014-11-04
申请号：US13334331
申请日：2011-12-22
CPC分类号： H04B1/1653 , H04B1/1646 , H04H40/45 , H04H40/72 , H04H40/81 , H04R29/00 , H04S7/301
摘要： An audio receiver may include a mono/stereo detector that causes the audio receiver to output either a monophonic or a stereophonic signal based on a difference between a pilot energy signal and a filtered pilot energy signal. The audio receiver includes a filter that filters the pilot energy signal to generate a filtered pilot energy signal, wherein a variable leakage factor associated with the filter is used to minimize a noise level of the filtered pilot energy signal and to reduce a response time of the audio receiver.
摘要翻译： 音频接收器可以包括单声道/立体声检测器，其使音频接收器基于导频能量信号和滤波的导频能量信号之间的差异来输出单声道或立体声信号。 音频接收器包括滤波器，其对导频能量信号进行滤波以产生经滤波的导频能量信号，其中使用与滤波器相关联的可变泄漏因子来最小化滤波后的导频能量信号的噪声电平并减少 音频接收器
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4.发明授权Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal 有权用于从立体声复用信号中恢复副载波信号的系统和方法公开(公告)号：US08472906B1
公开(公告)日：2013-06-25
申请号：US13599621
申请日：2012-08-30
申请人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
发明人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
IPC分类号： H04B7/00
CPC分类号： H04B1/1653 , H04H40/45
摘要： Disclosed herein are systems and methods for recovering a sub-carrier signal from a multiplexed signal having an embedded pilot tone signal. The recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for generating a frequency-doubled signal from the recovered pilot signal, and for phase-shifting the frequency-doubled signal by a pre-determined phase difference from the embedded pilot tone signal. Another recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for phase-shifting the pilot signal by a pre-determined phase difference from the embedded pilot tone signal, and for generating a frequency-doubled signal from the phase-shifted signal.
摘要翻译： 这里公开了用于从具有嵌入导频音信号的复用信号中恢复副载波信号的系统和方法。 恢复系统包括用于从所接收的多路复用信号中恢复导频信号的电路，用于从恢复的导频信号产生加倍频的信号，并且将加倍频信号与嵌入式导频相移预定的相位差 音调信号。 另一个恢复系统包括用于从接收到的多路复用信号中恢复导频信号的电路，用于将导频信号与嵌入的导频音信号相位相移预定的相位差，并用于从相移 信号。
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5.发明授权Stereo decoding system capable of reducing the phase shift during the signal transforming 有权立体声解码系统能够在信号变换期间减少相移公开(公告)号：US07822211B2
公开(公告)日：2010-10-26
申请号：US11456999
申请日：2006-07-12
IPC分类号： H04H20/48
CPC分类号： H04H40/63 , H04B1/1653
摘要： A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot signal. The PLL unit receives the pilot signal to generate a PLL output signal. The stereo decoder receives the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.
摘要翻译： 立体声解码系统包括振荡器，带通滤波器，PLL单元和立体声解码器。 振荡器产生具有中心频率的第一信号。 带通滤波器接收立体声多路复用信号和第一信号以滤除导频信号。 PLL单元接收导频信号以产生PLL输出信号。 立体声解码器接收立体声多路复用信号和PLL输出信号，以分离来自立体声多路复用信号的左声道信号和右声道信号。
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公开(公告)号：US07724843B2
公开(公告)日：2010-05-25
申请号：US11405887
申请日：2006-04-18
CPC分类号： H04L27/14 , G11B31/003 , H04B1/0007 , H04B1/1653 , H04B1/28 , H04B1/30
摘要： A handheld audio system having a radio signal decoder that includes a method for adjusting a system clock. Adjusting the system clock includes receiving a signal at a rate of a receive clock, wherein the signal includes data at a transmit rate. An error term is determined between the receive rate and the transmit rate. Based on the receive clock and the error term, where the error term is non-zero, a clock signal is generated.
摘要翻译： 一种具有无线电信号解码器的手持音频系统，其包括用于调整系统时钟的方法。 调整系统时钟包括以接收时钟的速率接收信号，其中信号包括传输速率的数据。 在接收速率和传输速率之间确定误差项。 基于接收时钟和误差项，其中误差项不为零，产生时钟信号。
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7.发明申请STEREO DECODING SYSTEM CAPABLE OF REDUCING THE PHASE SHIFT DURING THE SIGNAL TRANSFORMING 有权立体声解码系统能够在信号变换期间减少相位移位公开(公告)号：US20080013743A1
公开(公告)日：2008-01-17
申请号：US11456999
申请日：2006-07-12
IPC分类号： H04H5/00
CPC分类号： H04H40/63 , H04B1/1653
摘要： A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot signal. The PLL unit receives the pilot signal to generate a PLL output signal. The stereo decoder receives the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.
摘要翻译： 立体声解码系统包括振荡器，带通滤波器，PLL单元和立体声解码器。 振荡器产生具有中心频率的第一信号。 带通滤波器接收立体声多路复用信号和第一信号以滤除导频信号。 PLL单元接收导频信号以产生PLL输出信号。 立体声解码器接收立体声多路复用信号和PLL输出信号，以分离来自立体声多路复用信号的左声道信号和右声道信号。
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公开(公告)号：US20060251196A1
公开(公告)日：2006-11-09
申请号：US10564922
申请日：2004-07-16
IPC分类号： H04B1/10
CPC分类号： H04H20/48 , H04B1/1653
摘要： An arrangement for recovering a first digital signal (7,31) from a digital input signal (20) comprises a digital filter (29) for filtering the digital input signal (20), a digitally controlled oscillator 28 for generating a digital reference signal (21) and a digital phase detector (22) for determining a phase difference (25) between the filtered digital input signal (27) and the digital reference signal (21). The first digital signal (7, 31) can be recovered by adding the determined phase difference (25) to the phase of the digital reference signal (21).
摘要翻译： 用于从数字输入信号（20）恢复第一数字信号（7,31）的装置包括用于对数字输入信号（20）进行滤波的数字滤波器（29），用于产生数字参考信号的数字控制振荡器28 21）和用于确定经滤波的数字输入信号（27）和数字参考信号（21）之间的相位差（25）的数字相位检测器（22）。 可以通过将确定的相位差（25）加到数字参考信号（21）的相位来恢复第一数字信号（7,31）。
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公开(公告)号：US5467399A
公开(公告)日：1995-11-14
申请号：US298703
申请日：1994-08-31
申请人： John E. Whitecar
发明人： John E. Whitecar
CPC分类号： H04H20/48 , H03D1/22 , H04B1/1653
摘要： A digital radio receiver generates coherent signals for synchronous detection without use of a phase-locked loop by employing an adaptive notch filter to cancel the desired signal. The cancelling signal is employed as the coherent signal for synchronous detection. The invention obtains faster locking to the desired signal, a wider capture range, and more efficient software coding in a digital signal processing receiver.
摘要翻译： 数字无线电接收机通过采用自适应陷波滤波器来消除所需信号，产生用于同步检测的相干信号，而不使用锁相环。 采用消除信号作为同步检测的相干信号。 本发明在数字信号处理接收机中获得对期望信号的更快的锁定，更宽的捕获范围和更有效的软件编码。
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10.发明授权Interference reduction using an adaptive receiver filter, signal strength, and BER sensing 失效使用自适应接收机滤波器的干扰减少，信号强度和BER传感
公开(公告)号：US5287556A
公开(公告)日：1994-02-15
申请号：US590415
申请日：1990-09-28
申请人： Stephen V. Cahill
发明人： Stephen V. Cahill
CPC分类号： H04B1/1653 , H04B1/1027 , H04B2001/1054
摘要： A radio receiver having a variable bandwidth received channel filter (113,115) to reduce interference is disclosed. A interference is detected by comparing received signal strength and received signal BER. The bandwidth of the filter (113,115) is narrowed to improve BER when a received signal strength is greater than a threshhold value and BER is worse than a threshhold value.
摘要翻译： 公开了一种具有可变带宽接收信道滤波器（113,115）以减少干扰的无线电接收机。 通过比较接收信号强度和接收信号BER来检测干扰。 当接收信号强度大于阈值并且BER差于阈值时，滤波器（113,115）的带宽变窄以提高BER。
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