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1. 发明授权

US5177741A Subscriber unit for wireless digital telephone system 失效
标题翻译：无线数字电话系统用户单元
公开(公告)号：US5177741A
公开(公告)日：1993-01-05
申请号：US256577
申请日：1988-10-12
申请人： David N. Critchlow , Graham N. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham N. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： In a wireless digital telephone system, a circuit for determining in a subscriber unit whether a particular RF channel is of the type designated by the base station to be either a control channel or a voice channel and for determining whether the channel is in the transmit or receive mode; the circuit utilizing the duration of an AM hole to determine the type of the channel and utilizing a unique word for determining the mode.
摘要翻译：在无线数字电话系统中，用于在用户单元中确定特定RF信道是否是由基站指定为要么是控制信道或语音信道的类型的电路，并且用于确定信道是否在传输或接收模式; 该电路利用AM孔的持续时间来确定信道的类型并利用唯一的字来确定该模式。

2. 发明授权

US4994802A Subscriber unit for wireless digital telephone system 失效
标题翻译：无线数字电话系统用户单元
公开(公告)号：US4994802A
公开(公告)日：1991-02-19
申请号：US256579
申请日：1988-10-12
申请人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： An analog to digital converter system utilizable in a wireless digital telephone network, the system comprising a circuit to produce an analog signal, and a circuit for amplifying this signal, mixing the amplified signal with a signal from a timing circuit and applying the output of the mixer to a sample and hold circuit; the output of the sample and hold circuit being then applied to an analog to digital converter, the output of which is applied to a FIFO, whose output is then available for further processing.
摘要翻译：一种可用于无线数字电话网络的模数转换器系统，该系统包括产生模拟信号的电路，以及用于放大该信号的电路，将放大的信号与来自定时电路的信号进行混合，混频器到采样保持电路; 采样和保持电路的输出然后被施加到模数转换器，其输出被施加到FIFO，其输出然后可用于进一步处理。

3. 发明授权

US5101418A Digital time-multiplexed quadrature frequency upconverter 失效
标题翻译：数字时分复用正交频率上变频器
公开(公告)号：US5101418A
公开(公告)日：1992-03-31
申请号：US256420
申请日：1988-10-12
申请人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to a storage for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out device may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filted to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations of the IF, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer.
摘要翻译：一种用于与基站无线连接的数字无线用户电话单元。用户单元具有耦合到用于基带功能的存储器的基带处理器。基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定装置。来自调制解调器处理器的信号被转换为模拟信号，该模拟信号经过去抖动，然后去角化信号被上变频和滤波，以形成IF信号，此后被放大。放大的IF信号与由合成器产生的信号组合以提供RF信号。基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。在系统的致动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF的不期望的变化，这些常数被存储用于校正实际接收信号。在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。解复用的I和Q采样被馈送到均衡器和频率校正电路，用于最小化误差并产生用于校正系统的定时和合成器的输出中的任何误差的频率校正信号。

4. 发明授权

US5168507A Automatic adaptive equalizer 失效
标题翻译：自动均衡器
公开(公告)号：US5168507A
公开(公告)日：1992-12-01
申请号：US433995
申请日：1989-11-09
申请人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H03D3/00 , H03D7/16 , H04L27/233
CPC分类号： H04L27/2338 , H03D7/165 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： A digital wireless subscriber telephone unit for wireless communication with a base station. An IF is used within the subscriber unit and base station which is combined with a carrier signal generated by a synthesizer for RF transmission between stations. In intervals between actuation of the system, a training mode is used wherein a known training signal is compared with a known values to produce correction coefficients to compensate for undesirable variations in timing and/or frequency, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors for production of a frequency correction signal based upon the correction coefficients which is used to correct any errors in the timing and frequency of the system.
摘要翻译：一种用于与基站进行无线通信的数字无线用户电话单元。在用户单元和基站中使用IF，其与由合成器生成的载波信号组合以在站之间进行RF传输。在系统的致动之间的间隔中，使用训练模式，其中将已知训练信号与已知值进行比较以产生校正系数以补偿定时和/或频率中不期望的变化，这些常数被存储以用于校正实际接收信号。在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。解复用的I和Q采样被馈送到均衡器和频率校正电路，用于基于用于校正系统的定时和频率中的任何误差的校正系数来最小化用于产生频率校正信号的误差。

5. 发明授权

US4996697A Deglitching means for digital communication systems 失效
标题翻译：用于数字通信系统的降角装置
公开(公告)号：US4996697A
公开(公告)日：1991-02-26
申请号：US256416
申请日：1988-10-12
申请人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： In a digital wireless subscriber telephone unit for wireless connection with a base station which includes a modem processor whose signal is converted to an analog signal which is then upconverted and filtered to form an IF signal, a deglitching circuit for removing glitch spikes occurring during the transition periods from digital signals to analog signals comprising a timing system, a detector for detecting the transistion periods in order to control the timing system, and a mixer coupled to the output of a D/A converter to mix a blanking signal from the timing system with the analog signal received from the D/A converter during the transistion periods, whereby the output of the mixer is returned to an intermediate reference level.
摘要翻译：在用于与基站无线连接的数字无线用户电话单元中，该基站包括其信号被转换为模拟信号的调制解调器处理器，该模拟信号被上变频和滤波以形成IF信号，用于去除在转换期间发生的毛刺尖峰的去激活电路从数字信号到包括定时系统的模拟信号的周期，用于检测转移周期以便控制定时系统的检测器，以及耦合到D / A转换器的输出的混频器，以将来自定时系统的消隐信号与在转换期间从D / A转换器接收的模拟信号，由此混频器的输出返回到中间参考电平。

6. 发明授权

US5842137A Subscriber unit for wireless digital telephone system 失效
标题翻译：无线数字电话系统用户单元
公开(公告)号：US5842137A
公开(公告)日：1998-11-24
申请号：US264200
申请日：1994-06-22
申请人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.
摘要翻译：公开了一种用于无线数字电话系统的用户单元。公开了用于接收I和Q样本的均衡器，其形式为。 I和Q样本是以频率提供的复杂样本对。均衡器以复杂I和Q采样对的形式接收训练信号。训练信号受I和Q样本中可能存在的不良特征的影响。比较器将实际的输入训练信号与期望的输出进行比较，以获得用于均衡器的一组加权系数以产生期望的输出。频率校正电路根据加权系数为采样对的频率提供校正的频率信号。

7. 发明授权

US5067141A Interpolator for varying a signal sampling rate 失效
标题翻译：用于改变信号采样率的插值器
公开(公告)号：US5067141A
公开(公告)日：1991-11-19
申请号：US419501
申请日：1989-10-10
申请人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H03D3/00 , H03D7/16 , H04L27/233
CPC分类号： H04L27/2338 , H03D7/165 , H03H17/0657 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161 , H03H2218/04
摘要： An interpolator varies the sampling rate of a signal. The signal may comprise pairs of in-phase and quadrature components at a first rate which are serially input through a pair of memories connected in series. The serially connected memories operate at a second higher rate which is a multiple of the first rate. An output taps the signals being circulated by the serially connected memories which results in the output of a signal having the in-phase and quadrature components at the higher second rate.
摘要翻译：内插器改变信号的采样率。信号可以包括以串联方式连续输入的一对存储器的第一速率的同相和正交分量对。串行连接的存储器以第二较高速率操作，其是第一速率的倍数。输出抽头被串行连接的存储器循环的信号，其导致具有较高第二速率的具有同相和正交分量的信号的输出。

8. 发明授权

US4893317A Digital signals and frequency correction in a digital wireless system 失效
标题翻译：数字信号和数字无线系统中的频率校正
公开(公告)号：US4893317A
公开(公告)日：1990-01-09
申请号：US256415
申请日：1988-10-12
申请人： David N. Critchlow , Graham M. Avis , Sandra J. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage device for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out circuit may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filtered to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations in the IF, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer. 2
摘要翻译：一种用于与基站无线连接的数字无线用户电话单元。用户单元具有耦合到用于基带功能的存储设备的基带处理器。基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定电路。来自调制解调器处理器的信号被转换成模拟信号，该模拟信号经过去抖动，然后将去抖动信号上变频和滤波，以形成IF信号，此后被放大。放大的IF信号与由合成器产生的信号组合以提供RF信号。基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。在系统的启动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF中的不期望的变化，这些常数被存储用于校正实际接收信号。在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。解复用的I和Q采样被馈送到均衡器和频率校正电路，用于最小化误差并产生用于校正系统的定时和合成器的输出中的任何误差的频率校正信号。

9. 发明授权

US4881240A AM equalizer circuit for digital systems 失效
标题翻译： AM均衡器电路用于数字系统
公开(公告)号：US4881240A
公开(公告)日：1989-11-14
申请号：US256557
申请日：1988-10-12
申请人： David N. Critchlow , Graham M. Avis , Sandra J. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
发明人： David N. Critchlow , Graham M. Avis , Sandra J. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling , Eric Paneth , Moshe Yehushua
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage device for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out circuit may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filtered to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations in the IF, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer.
摘要翻译：一种用于与基站无线连接的数字无线用户电话单元。用户单元具有耦合到用于基带功能的存储设备的基带处理器。基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定电路。来自调制解调器处理器的信号被转换成模拟信号，该模拟信号经过去抖动，然后将去抖动信号上变频和滤波，以形成IF信号，此后被放大。放大的IF信号与由合成器产生的信号组合以提供RF信号。基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。在系统的启动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF中的不期望的变化，这些常数被存储用于校正实际接收信号。在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。解复用的I和Q采样被馈送到均衡器和频率校正电路，用于最小化误差并产生用于校正系统的定时和合成器的输出中的任何误差的频率校正信号。

10. 发明授权

US4825448A Subscriber unit for wireless digital telephone system 失效
标题翻译：无线数字电话系统用户单元
公开(公告)号：US4825448A
公开(公告)日：1989-04-25
申请号：US893916
申请日：1986-08-07
申请人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling
发明人： David N. Critchlow , Graham M. Avis , Sandra J. K. Earlam , Karle J. Johnson , Bruce A. Smetana , Gregory L. Westling
IPC分类号： H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
CPC分类号： H04M1/72502 , H03D3/006 , H03D7/165 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03D3/007 , H03D7/161
摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has baseband processor which is coupled to storage means for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out means may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filtered to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undersirable variations in the IF, these constants being stored for use in correcting actual received signals.
摘要翻译：一种用于与基站无线连接的数字无线用户电话单元。用户单元具有基带处理器，其耦合到用于基带功能的存储装置。基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定装置。来自调制解调器处理器的信号被转换成模拟信号，该模拟信号经过去抖动，然后将去抖动信号上变频和滤波，以形成IF信号，此后被放大。放大的IF信号与由合成器产生的信号组合以提供RF信号。基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。在系统启动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF中不太可取的变化，这些常数被存储用于校正实际接收信号。

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