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1.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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2.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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公开(公告)号：US08099050B1
公开(公告)日：2012-01-17
申请号：US12544567
申请日：2009-08-20
IPC分类号： H04B1/16
CPC分类号： H04L27/2334 , H04B1/1653 , H04H20/34 , H04H40/18 , H04H2201/13
摘要： Methods and apparatus are provided for receiving a first signal and generating an output signal indicative of radio data system (“RDS”) information. A receiver circuit of the invention can include mixer circuitry, lowpass filter circuitry, downsampler circuitry, and decoder circuitry. Advantageously, the receiver circuit can operate entirely within the digital domain, promoting interoperability with digital frequency modulation (“FM”) demodulator circuitry.
摘要翻译： 提供了用于接收第一信号并产生指示无线电数据系统（“RDS”）信息的输出信号的方法和装置。 本发明的接收机电路可以包括混频器电路，低通滤波器电路，下采样器电路和解码器电路。 有利地，接收器电路可以完全在数字域内操作，促进与数字频率调制（“FM”）解调器电路的互操作性。
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公开(公告)号：US07958434B1
公开(公告)日：2011-06-07
申请号：US11828185
申请日：2007-07-25
IPC分类号： H03M13/00
摘要： In a method for synchronizing to a signal encoded as a group of blocks, a data symbol is received and stored with previously received data symbols as a current potential group. Errors, if any, are detected in the current potential group, and a level of errors associated with the current potential group is deter mined. The current potential group is determined to be an actual group if the current potential group is without errors. Also, the current potential group is determined to be an actual group if a set of potential groups including the current potential group and at least one previous potential group has an acceptable level of errors.
摘要翻译： 在与编码为块组的信号同步的方法中，接收数据符号并将其与先前接收的数据符号一起存储为当前电势组。 在当前潜在的组中检测到错误（如果有的话），并且确定与当前潜在的组相关联的错误级别。 如果当前潜在的组没有错误，则将当前潜在的组确定为实际组。 此外，如果包括当前潜在组和至少一个先前的潜在组的一组潜在组具有可接受的错误水平，则将当前潜在组确定为实际组。
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公开(公告)号：US07949320B1
公开(公告)日：2011-05-24
申请号：US12115326
申请日：2008-05-05
CPC分类号： H04B17/318
摘要： In a technique for detecting single or multiple channels in a broadcast RF signal, a receiver determines a constant modulus indication value for each frequency of the receiver's local oscillator, as that oscillator is tuned across a range of possible channel frequencies. The receiver may determine this constant modulus indication value by determining the magnitudes of a constant modulus signal and a noise signal, for a signal output from a digital front end, that signal representing a mixing of the local oscillator frequency signal with the broadcast RF signal and a channelization thereof. As the local oscillator frequency signal is tuned through the range of possible channel frequencies, the receiver evaluates the constant modulus indication value course and or fine frequency increments to determine if the constant modulus indication value at any frequency rises above a threshold value, thereby indicating that the local oscillator frequency signal has locked onto an RF channel in the original RF signal.
摘要翻译： 在用于检测广播RF信号中的单个或多个信道的技术中，接收机确定接收机本地振荡器的每个频率的恒定模量指示值，因为该振荡器在可能的信道频率的范围内被调谐。 接收机可以通过确定对于从数字前端输出的信号的恒模信号和噪声信号的幅度来确定该恒定模量指示值，该信号表示本地振荡器频率信号与广播RF信号的混合，以及 其渠道化。 由于本地振荡器频率信号在可能的信道频率的范围内被调谐，所以接收机对恒定模量指示值进程和/或精细频率增量进行评估，以确定任何频率上的常数模量指示值是否高于阈值，从而表明 本地振荡器频率信号已锁定在原始RF信号中的RF信道上。
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6.发明授权Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal 失效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：US07684774B1
公开(公告)日：2010-03-23
申请号：US11582735
申请日：2006-10-17
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： H04B1/06
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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7.发明授权公开(公告)号：US08953809B1
公开(公告)日：2015-02-10
申请号：US13419730
申请日：2012-03-14
CPC分类号： H04B1/1653 , H04B1/1646 , H04H40/45 , H04H40/72 , H04H40/81 , H04R29/00 , H04S7/301
摘要： A system and method for switching a mode of a receiver between a monophonic and stereophonic mode is disclosed. The method can include generating a residual signal indicative of a noise level associated with a pilot energy signal, calculating a residual block energy level of the residual signal over an observation interval, generating a monitor signal based on a number of times the pilot energy signal is less than a pilot energy threshold during the observation interval and switching the mode of the receiver based on the residual block energy level and the monitor signal.
摘要翻译： 公开了一种用于在单声道和立体声模式之间切换接收机的模式的系统和方法。 该方法可以包括产生指示与导频能量信号相关联的噪声电平的残余信号，在观测间隔上计算剩余信号的残余块能级，基于导频能量信号的次数产生监视信号 在观察间隔期间小于导频能量阈值，并且基于剩余块能级和监视信号切换接收机的模式。
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8.发明授权System and method for estimating channel condition based on filtered pilot energy signal 有权基于滤波导频能量信号估计信道条件的系统和方法公开(公告)号：US08948402B1
公开(公告)日：2015-02-03
申请号：US13419766
申请日：2012-03-14
CPC分类号： H04B1/1653 , H04B1/1646 , H04H40/45 , H04H40/72 , H04H40/81 , H04R29/00 , H04S7/301
摘要： A receiver may estimate a channel condition based on a difference between a pilot energy signal and a filtered pilot energy signal. The receiver may further switch to a stereophonic mode when both the difference and an energy level of the pilot energy signal satisfy a predetermined requirement of the receiver, and switch to a monophonic mode when either the difference or the energy level of the pilot energy signal fail to satisfy the predetermined requirement of the receiver.
摘要翻译： 接收机可以基于导频能量信号和滤波的导频能量信号之间的差来估计信道状况。 当导频能量信号的差异和能量水平都满足接收机的预定要求时，接收机可以进一步切换到立体声模式，并且当导频能量信号的差值或能量级别失败时，接收机可以切换到单声道模式 以满足接收机的预定要求。
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9.发明授权公开(公告)号：US08139771B1
公开(公告)日：2012-03-20
申请号：US11871751
申请日：2007-10-12
CPC分类号： H04B1/1653 , H04B1/1646 , H04H40/45 , H04H40/72 , H04H40/81 , H04R29/00 , H04S7/301
摘要： A system and method for switching a mode of a receiver between a monophonic and stereophonic mode is disclosed. The method can include generating a residual signal indicative of a noise level associated with a pilot energy signal, calculating a residual block energy level of the residual signal over an observation interval, generating a monitor signal based on a number of times the pilot energy signal is less than a pilot energy threshold during the observation interval and switching the mode of the receiver based on the residual block energy level and the monitor signal.
摘要翻译： 公开了一种用于在单声道和立体声模式之间切换接收机的模式的系统和方法。 该方法可以包括产生指示与导频能量信号相关联的噪声电平的残余信号，在观测间隔上计算剩余信号的残余块能级，基于导频能量信号的次数产生监视信号 在观察间隔期间小于导频能量阈值，并且基于剩余块能级和监视信号切换接收机的模式。
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10.发明授权公开(公告)号：US08093841B1
公开(公告)日：2012-01-10
申请号：US11871755
申请日：2007-10-12
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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