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1. 发明授权

US08160528B2 Method and device for detecting presence of a carrier signal in a received signal 有权
标题翻译：用于检测接收信号中载波信号的存在的方法和装置
公开(公告)号：US08160528B2
公开(公告)日：2012-04-17
申请号：US12257672
申请日：2008-10-24
申请人： Geetha K. Thampi , Apoorv Chaudhri , Jesus F. Corretjer , Yadunandana N. Rao
发明人： Geetha K. Thampi , Apoorv Chaudhri , Jesus F. Corretjer , Yadunandana N. Rao
IPC分类号： H04B1/16
CPC分类号： H04L27/0014 , H04L27/3845
摘要： A device receives a signal and, prior to demodulating the signal determines whether carrier is present in the received signal based on the correlation depth of the received signal. The device determines a plurality of values for the received signal that indicate the amount of correlation in the received signal and detects the presence of the carrier in the received signal as a function of the plurality of values. The plurality of values can include autocorrelation values and prediction coefficients, wherein the autocorrelation values are estimated based on an autocorrelation function derived for the received signal, and the prediction coefficients are generated using a prediction model that is derived as a function of the autocorrelation values. The prediction coefficients can be summed to generate a decision statistic that is compared to a detection threshold to detect the presence of the carrier.
摘要翻译：设备接收信号，并且在解调之前，信号基于接收信号的相关深度确定载波是否存在于接收信号中。设备确定接收信号的多个值，其指示接收信号中的相关量，并根据多个值检测接收信号中载波的存在。多个值可以包括自相关值和预测系数，其中基于针对接收信号导出的自相关函数来估计自相关值，并且使用作为自相关值的函数导出的预测模型来生成预测系数。可以将预测系数相加以生成与检测阈值进行比较以检测载体的存在的判定统计量。

2. 发明申请

US20110312294A1 AUDIO HOLE SUPPRESSION METHOD AND APPARATUS FOR A TWO-WAY RADIO 有权
标题翻译：用于两路无线电的音频孔抑制方法和装置
公开(公告)号：US20110312294A1
公开(公告)日：2011-12-22
申请号：US12817007
申请日：2010-06-16
申请人： Geetha K. Thampi , Charles H. Carter , Jesus F. Corretjer , Yadunandana N. Rao
发明人： Geetha K. Thampi , Charles H. Carter , Jesus F. Corretjer , Yadunandana N. Rao
IPC分类号： H04B1/10
CPC分类号： H04B1/1661 , H03G3/348
摘要： A channel scanning technique and apparatus provides audio hole suppression in two-way radio communications. Upon detecting the absence of a carrier signal on a priority channel during a priority scan mode of operation, a training waveform is constructed upon returning to the home-channel. The training waveform is applied to audio shaping filters within an audio lineup to suppress transients and minimize or eliminate the occurrence of audio pops at a speaker output thereby reducing the audio hole.
摘要翻译：信道扫描技术和装置在双向无线电通信中提供音频孔抑制。在优先扫描操作模式期间检测到在优先信道上不存在载波信号时，在返回归属信道时构建训练波形。训练波形被应用于音频阵容中的音频整形滤波器以抑制瞬变，并且最小化或消除扬声器输出处的音频弹出的发生，从而减少音频孔。

3. 发明授权

US08565702B2 Audio hole suppression method and apparatus for a two-way radio 有权
标题翻译：用于双向无线电的音频孔抑制方法和装置
公开(公告)号：US08565702B2
公开(公告)日：2013-10-22
申请号：US12817007
申请日：2010-06-16
申请人： Geetha K. Thampi , Charles H. Carter , Jesus F. Corretjer , Yadunandana N. Rao
发明人： Geetha K. Thampi , Charles H. Carter , Jesus F. Corretjer , Yadunandana N. Rao
IPC分类号： H04B1/10
CPC分类号： H04B1/1661 , H03G3/348
摘要： A channel scanning technique and apparatus provides audio hole suppression in two-way radio communications. Upon detecting the absence of a carrier signal on a priority channel during a priority scan mode of operation, a training waveform is constructed upon returning to the home-channel. The training waveform is applied to audio shaping filters within an audio lineup to suppress transients and minimize or eliminate the occurrence of audio pops at a speaker output thereby reducing the audio hole.
摘要翻译：信道扫描技术和装置在双向无线电通信中提供音频孔抑制。在优先扫描操作模式期间检测到在优先信道上不存在载波信号时，在返回归属信道时构建训练波形。训练波形被应用于音频阵容中的音频整形滤波器以抑制瞬变，并且最小化或消除扬声器输出处的音频弹出的发生，从而减少音频孔。

4. 发明申请

US20100222007A1 NARROWBAND SYSTEM AND METHOD FOR DEFINING NARROWBAND CHANNELS IN UNUSED WIDEBAND CHANNELS 有权
标题翻译：窄带通道中的窄带信道的窄带系统和方法
公开(公告)号：US20100222007A1
公开(公告)日：2010-09-02
申请号：US12394955
申请日：2009-02-27
申请人： YADUNANDANA N. RAO , APOORV CHAUDHRI , GEETHA K. THAMPI
发明人： YADUNANDANA N. RAO , APOORV CHAUDHRI , GEETHA K. THAMPI
IPC分类号： H04B17/00 , H04N5/38
CPC分类号： H04W24/10 , H04W8/005 , H04W16/14 , H04W64/00 , H04W72/00 , H04W72/04
摘要： A narrowband communication system (100) includes a base station (102) and a plurality of subscriber units (104). The base station assigns one or more wideband channels to be measured to each subscriber unit (606). The subscriber units tune to their assigned wideband channels and perform narrowband measurements, then report the results to the base station (612). The base station then analyzes the measurement results (614) and selects available wideband channels to be divided into narrowband channels for use by the narrowband system.
摘要翻译：窄带通信系统（100）包括基站（102）和多个用户单元（104）。基站向每个用户单元（606）分配要测量的一个或多个宽带信道。用户单元调谐到其分配的宽带信道并执行窄带测量，然后将结果报告给基站（612）。然后，基站分析测量结果（614）并选择可分割成窄带信道的可用宽带信道以供窄带系统使用。

5. 发明申请

US20100105345A1 METHOD AND DEVICE FOR DETECTING PRESENCE OF A CARRIER SIGNAL IN A RECEIVED SIGNAL 有权
标题翻译：用于检测载波信号在接收信号中的存在的方法和装置
公开(公告)号：US20100105345A1
公开(公告)日：2010-04-29
申请号：US12257672
申请日：2008-10-24
申请人： GEETHA K. THAMPI , APOORV CHAUDHRI , JESUS F. CORRETJER , YADUNANDANA N. RAO
发明人： GEETHA K. THAMPI , APOORV CHAUDHRI , JESUS F. CORRETJER , YADUNANDANA N. RAO
IPC分类号： H04B1/06
CPC分类号： H04L27/0014 , H04L27/3845
摘要： A device receives a signal and, prior to demodulating the signal determines whether carrier is present in the received signal based on the correlation depth of the received signal. The device determines a plurality of values for the received signal that indicate the amount of correlation in the received signal and detects the presence of the carrier in the received signal as a function of the plurality of values. The plurality of values can include autocorrelation values and prediction coefficients, wherein the autocorrelation values are estimated based on an autocorrelation function derived for the received signal, and the prediction coefficients are generated using a prediction model that is derived as a function of the autocorrelation values. The prediction coefficients can be summed to generate a decision statistic that is compared to a detection threshold to detect the presence of the carrier.
摘要翻译：设备接收信号，并且在解调之前，信号基于接收信号的相关深度确定载波是否存在于接收信号中。设备确定接收信号的多个值，其指示接收信号中的相关量，并根据多个值检测接收信号中载波的存在。多个值可以包括自相关值和预测系数，其中基于针对接收信号导出的自相关函数来估计自相关值，并且使用作为自相关值的函数导出的预测模型来生成预测系数。可以将预测系数相加以生成与检测阈值进行比较以检测载体的存在的判定统计量。

6. 发明授权

US08107887B2 Narrowband system and method for defining narrowband wideband channels in unused wideband channels 有权
标题翻译：用于在未使用的宽带信道中定义窄带信道的窄带系统和方法
公开(公告)号：US08107887B2
公开(公告)日：2012-01-31
申请号：US12394955
申请日：2009-02-27
申请人： Yadunandana N. Rao , Apoorv Chaudhri , Geetha K. Thampi
发明人： Yadunandana N. Rao , Apoorv Chaudhri , Geetha K. Thampi
IPC分类号： H04B17/00
CPC分类号： H04W24/10 , H04W8/005 , H04W16/14 , H04W64/00 , H04W72/00 , H04W72/04
摘要： A narrowband communication system (100) includes a base station (102) and a plurality of subscriber units (104). The base station assigns one or more wideband channels to be measured to each subscriber unit (606). The subscriber units tune to their assigned wideband channels and perform narrowband measurements, then report the results to the base station (612). The base station then analyzes the measurement results (614) and selects available wideband channels to be divided into narrowband channels for use by the narrowband system.
摘要翻译：窄带通信系统（100）包括基站（102）和多个用户单元（104）。基站向每个用户单元（606）分配要测量的一个或多个宽带信道。用户单元调谐到其分配的宽带信道并执行窄带测量，然后将结果报告给基站（612）。然后，基站分析测量结果（614）并选择可分割成窄带信道的可用宽带信道以供窄带系统使用。

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