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1. 发明授权

US06396885B1 Co-channel interference reduction in wireless communications systems 有权
标题翻译：无线通信系统中的同频干扰减少
公开(公告)号：US06396885B1
公开(公告)日：2002-05-28
申请号：US09203755
申请日：1998-12-02
申请人： Zhi Ding , Philip H. Thomas , Rui Wang , Wen Tong
发明人： Zhi Ding , Philip H. Thomas , Rui Wang , Wen Tong
IPC分类号： H04L102
CPC分类号： H04B7/0848
摘要： Co-channel interference with a desired signal in a receiver arrangement of a TDMA cellular radio communications system having two antennas and receivers for providing two received signals is reduced. Two sampled signals are derived from each of the two received signals by sampling the respective received signal at twice the symbol rate of the system and separating alternate samples at twice the symbol rate to produce the two sampled signals each with different samples at the symbol rate, providing a total of four sampled signals from the two antennas. These signals are linearly combined with respective weights to produce an output signal, the weights being determined to reduce co-channel interference with the desired signal represented by the output signal.
摘要翻译：减少了具有两个用于提供两个接收信号的天线和接收机的TDMA蜂窝无线电通信系统的接收机布置中的期望信号的同信道干扰。通过以两倍的系统的符号速率对相应的接收信号进行采样，以两倍的符号速率分离替代采样，从而从两个接收信号中的每一个导出两个采样信号，以产生每个具有符号速率的不同采样的两个采样信号，提供来自两个天线的总共四个采样信号。这些信号与相应的权重线性组合以产生输出信号，确定权重以减少与由输出信号表示的期望信号的同信道干扰。

2. 发明授权

US5754603A Pseudo random number sequence synchronization in communications systems 失效
标题翻译：通信系统中的伪随机数序列同步
公开(公告)号：US5754603A
公开(公告)日：1998-05-19
申请号：US688670
申请日：1996-07-29
申请人： Philip H. Thomas , Gang Li , Rui Wang , Iouri Trofimov , Alexandre Chloma , Mikhail Bakouline , Vitali Kreindeline
发明人： Philip H. Thomas , Gang Li , Rui Wang , Iouri Trofimov , Alexandre Chloma , Mikhail Bakouline , Vitali Kreindeline
IPC分类号： H04B1/7075 , H04B1/7077 , H04L7/04 , H04L7/00
CPC分类号： H04B1/70752 , H04L7/043 , H04B1/70775
摘要： A method of synchronizing to a pseudo random sequence, which can be generated by a linear feedback shift register having k stages and p intermediate taps, where k and p are positive integers and k>p, and a synchronization arrangement for carrying out the method are described. A received symbol sequence is supplied to a k-stage shift register with p intermediate taps in positions corresponding to the p taps of the linear feedback shift register. A respective correlation signal is recursively added at an input for the received symbol sequence and at each intermediate tap. Each correlation signal is produced by correlating at least two signals from said input, intermediate taps, and output other than the signal to which the respective correlation signal is added. The invention is particularly applicable to pilot synchronization in CDMA terminals.
摘要翻译：一种与伪随机序列同步的方法，其可以由具有k个级和p个中间抽头的线性反馈移位寄存器生成，其中k和p是正整数，k> p，并且用于执行该方法的同步装置是描述。接收的符号序列被提供给具有对应于线性反馈移位寄存器的p抽头的位置中的p个中间抽头的k级移位寄存器。相应的相关信号在接收的符号序列的输入端和每个中间抽头处被递归地相加。通过将来自所述输入，中间抽头和输出的至少两个信号与相关相关信号相加的信号相关联来产生每个相关信号。本发明特别适用于CDMA终端中的导频同步。

3. 发明授权

US5995565A Co-channel interference reduction 失效
标题翻译：同频干扰减少
公开(公告)号：US5995565A
公开(公告)日：1999-11-30
申请号：US728368
申请日：1996-10-10
申请人： Wen Tong , Rui Wang , Alauddin Javed , Alexander Vasiliyevich Garmonov , Anatoli Vasilievich Kotov , Andrey Yuriyevich Savinkov , Anatoly Gennadiyvich Filatov
发明人： Wen Tong , Rui Wang , Alauddin Javed , Alexander Vasiliyevich Garmonov , Anatoli Vasilievich Kotov , Andrey Yuriyevich Savinkov , Anatoly Gennadiyvich Filatov
IPC分类号： H03H17/02 , H04B1/10 , H04B1/12 , H04B3/14 , H04L25/08
CPC分类号： H04B1/123
摘要： Co-channel interference in baseband digital samples of an FM communications (e.g. AMPS) signal is cancelled by a complex signal limiter and non-linear filter (CLNF), to which the samples are supplied, and a time-varying null filter unit, to which the output samples from the CLNF are supplied, for separating the desired signal from residual interference. The output samples from the CLNF are also supplied via a selective narrow band filter bank to a non-linear transform unit for producing an energy based demodulation signal from which time-varying coefficients for the null filter are obtained. The units can be used individually or in different arrangements and combinations, and the transform unit can be augmented and used to replace a conventional FM demodulator.
摘要翻译： FM通信（例如AMPS）信号的基带数字采样中的同频干扰被提供样本的复信号限制器和非线性滤波器（CLNF）以及时变零滤波器单元消除，其中提供来自CLNF的输出样本，用于将期望的信号与残留干扰分离。来自CLNF的输出样本也通过选择性窄带滤波器组提供给非线性变换单元，用于产生基于能量的解调信号，从而获得空滤波器的时变系数。这些单元可以单独使用或以不同的布置和组合使用，变换单元可以增加并用于替代传统的FM解调器。

4. 发明授权

US06298461B1 Encoding and decoding methods and apparatus 有权
标题翻译：编码和解码方法和装置
公开(公告)号：US06298461B1
公开(公告)日：2001-10-02
申请号：US09236070
申请日：1999-01-25
申请人： Wen Tong , Rui Wang , Vitali B. Kreindeline , Mikhail G. Bakouline , Alexandre M. Chloma , Yuri S. Shinakov
发明人： Wen Tong , Rui Wang , Vitali B. Kreindeline , Mikhail G. Bakouline , Alexandre M. Chloma , Yuri S. Shinakov
IPC分类号： H03M1300
CPC分类号： H03M13/6362 , H03M13/1515 , H03M13/2966
摘要： An encoder for a wideband CDMA communications system comprises an outer Reed-Solomon code encoder and an inner parallel concatenated convolutional code (PCCC) or turbo code encoder. An iterative PCCC decoder, for decoding the inner code, includes summing functions in forward and feedback paths for producing extrinsic information to enhance soft decoding decisions by first and second decoders in successive decoding iterations. An outer code decoder connected following the PCCC decoder also can provide serial feedback information for enhancing iterative decisions by the PCCC decoder.
摘要翻译：用于宽带CDMA通信系统的编码器包括外部Reed-Solomon码编码器和内部并行级联卷积码（PCCC）或turbo码编码器。用于解码内码的迭代PCCC解码器包括用于产生外在信息的前向和反馈路径中的求和功能，以在连续解码迭代中增强第一和第二解码器的软解码决定。连接在PCCC解码器之后的外部码解码器也可以提供用于增强PCCC解码器的迭代决定的串行反馈信息。

5. 发明授权

US06463043B1 Carrier phase recovery of multi-rate signals 有权
标题翻译：多速率信号的载波相位恢复
公开(公告)号：US06463043B1
公开(公告)日：2002-10-08
申请号：US09200080
申请日：1998-11-25
申请人： Qiang Shen , Peter Savinsky , Rui Wang , Wen Tong , Dmitry Menyailov , Dmitry Pogorilko , Alexander Garmonov
发明人： Qiang Shen , Peter Savinsky , Rui Wang , Wen Tong , Dmitry Menyailov , Dmitry Pogorilko , Alexander Garmonov
IPC分类号： H03D100
CPC分类号： H04B1/712 , H04B1/7117 , H04L2027/0067
摘要： Methods and apparatus for performing complex channel gain estimation from a transformer output and a non-coherent combiner output include a selector, an envelope detector, a weighting unit, a controller, store units, and an averager. The device may perform coherent complex channel gain estimation on link signals for signals transmitted by IS-95 burst randomization, and may operate on a power control group.
摘要翻译：用于从变压器输出和非相干组合器输出执行复信道增益估计的方法和装置包括选择器，包络检测器，加权单元，控制器，存储单元和平均器。该装置可以对通过IS-95突发随机化发送的信号的链路信号执行相干复信道增益估计，并且可以在功率控制组上操作。

6. 发明授权

US6006083A Tone detection 失效
标题翻译：音调检测
公开(公告)号：US6006083A
公开(公告)日：1999-12-21
申请号：US927724
申请日：1997-09-11
申请人： Wen Tong , Rui Wang
发明人： Wen Tong , Rui Wang
IPC分类号： H04B1/00
CPC分类号： H04Q1/46
摘要： AMPS (Advanced Mobile Phone System) ST (signalling tone) is detected by a tone detector in which samples of a demodulated signal are amplitude limited to remove click energy, and the limited signal is bandpass filtered, using a notch filter and summer, to limit it to the range of possible ST frequency. Power of the bandpass filtered signal is detected, and compared with detected power of a version of the bandpass filtered signal from which any sinusoidal signal has been eliminated, independent of frequency, to provide for ST detection. A function [x(k)+x(k-2)]x(k-2)-[x(k-1)+x(k-3)]x(k-3) for successive samples x(k) of the bandpass filtered signal is used for the sinusoidal signal elimination. The invention can also be used to detect other tones.
摘要翻译： AMPS（高级移动电话系统）ST（信令音）由音调检测器检测，其中解调信号的采样被限幅以消除点击能量，并且使用陷波滤波器和夏季对有限信号进行带通滤波，以限制它到可能的ST频率的范围。检测带通滤波信号的功率，并且与已经消除了任何正弦信号的带通滤波信号的版本的检测功率无关，与频率无关，以提供ST检测。对于连续样本x（k）的函数[x（k）+ x（k-2）] x（k-2） - [x（k-1）+ x（k-3）的带通滤波信号用于正弦信号消除。本发明还可以用于检测其他音调。

7. 发明授权

US5848108A Selective filtering for co-channel interference reduction 失效
标题翻译：选择性滤波用于同信道干扰减少
公开(公告)号：US5848108A
公开(公告)日：1998-12-08
申请号：US759092
申请日：1996-11-29
申请人： Wen Tong , Rui Wang
发明人： Wen Tong , Rui Wang
IPC分类号： H04B7/005 , H04B1/10 , H04B7/12 , H04B15/00
CPC分类号： H04B7/12
摘要： Complex signal samples of an input signal are supplied to via a frequency down-shifter to a digital filter, and to a time-frequency transform unit which produces a plurality of frequency components each associated with a respective frequency band within a bandwidth of the input signal. The frequency component having the maximum momentary energy is determined to determine the down-shifting frequency for the associated frequency band to be filtered, and to determine a complementary up-shifting following the digital filter to produce an output signal. The filter can be a bandpass filter or a bandstop filter, especially for reducing co-channel interference in different types of wireless communications systems.
摘要翻译：将输入信号的复信号采样经由降频移位器提供给数字滤波器，以及时间 - 频率变换单元，其产生多个频率分量，每个频率分量与输入信号的带宽内的相应频带相关联。确定具有最大瞬时能量的频率分量以确定要滤波的相关频带的下移频率，并确定数字滤波器之后的互补上移以产生输出信号。滤波器可以是带通滤波器或带阻滤波器，特别是用于减少不同类型的无线通信系统中的同信道干扰。

8. 发明授权

US5740207A Complex signal limiting 失效
标题翻译：复信号限制
公开(公告)号：US5740207A
公开(公告)日：1998-04-14
申请号：US545182
申请日：1995-10-19
申请人： Wen Tong , Rui Wang
发明人： Wen Tong , Rui Wang
IPC分类号： G06F1/02 , G06F1/035 , G06F7/548 , H03G11/00 , H04B1/10 , H03D3/00 , H03K5/08
CPC分类号： G06F1/0356 , G06F2101/04 , G06F2101/08 , H04B1/1027
摘要： Each complex signal sample a(k)+jb(k) of a frequency modulated signal is limited in order to reduce co-channel interference. The limiting is performed efficiently in a digital signal processor by determining a ratio r with a magnitude less than one, equal to b(k)/a(k) in a first case and a(k)/b(k) in a second case, determining from a look-up table a variable p with a magnitude equal to 1/.sqroot.1+r.sup.2 , and determining a number equal to sgn(a(k))p(1+jr) in the first case and sgn(b(k))p(r+j) in the second case as the limited output signal sample.
摘要翻译：频率调制信号的每个复信号采样a（k）+ jb（k）被限制以减少同信道干扰。通过在第一种情况下确定小于1，等于b（k）/ a（k）的幅度的比率r和第二种情况下的（k）/ b（k）），在数字信号处理器中有效地执行限制。情况下，从查找表中确定幅度等于1 / 2ROOT + E，rad 1 + r2 + EE的变量p，并且确定等于sgn（a（k））p（1 + jr）第二种情况下的第一种情况和sgn（b（k））p（r + j）作为有限输出信号样本。

9. 发明授权

US06603962B1 Determining doppler bandwidth of a received signal from a determined power of a signal 有权
标题翻译：从确定的信号功率确定接收信号的多普勒带宽
公开(公告)号：US06603962B1
公开(公告)日：2003-08-05
申请号：US09693870
申请日：2000-10-23
申请人： Wen Tong , Rui Wang , Eddy Ning Hum
发明人： Wen Tong , Rui Wang , Eddy Ning Hum
IPC分类号： H04B1700
CPC分类号： H04B17/336
摘要： SIR (signal to impairment power ratio) of a received signal in a communications system is determined from DC components produced by at least two successive stages of performing a non-linear operation, e.g., squaring, the signal and separating the DC component from a non-DC component for supply to the next stage. A signal power of a desired signal component of the received signal can also be determined from the DC components. The signal power can be auto-correlated, and normalized auto-correlation results which exceed a threshold can be used to determine a Doppler bandwidth of the received signal, which can be used to adaptively adjust filters used for separating the DC components.
摘要翻译：通信系统中的接收信号的SIR（信号损害功率比）由通过执行非线性操作的至少两个连续阶段产生的DC分量确定，例如平方，信号并将DC分量与非线性运算 -DC组件供应到下一阶段。也可以从DC分量确定接收信号的期望信号分量的信号功率。信号功率可以是自动相关的，并且可以使用超过阈值的归一化自相关结果来确定接收信号的多普勒带宽，其可以用于自适应地调整用于分离DC分量的滤波器。

10. 发明授权

US06330432B1 Determining SIR in a communications system 失效
标题翻译：确定通信系统中的SIR
公开(公告)号：US06330432B1
公开(公告)日：2001-12-11
申请号：US09116479
申请日：1998-07-16
申请人： Wen Tong , Rui Wang , Eddy Ning Hum
发明人： Wen Tong , Rui Wang , Eddy Ning Hum
IPC分类号： H04B1700
CPC分类号： H04B17/336
摘要： SIR (signal to impairment power ratio) of a received signal in a communications system is determined from DC components produced by at least two successive stages of performing a non-linear operation, e.g. squaring, the signal and separating the DC component from a non-DC component for supply to the next stage. A signal power of a desired signal component of the received signal can also be determined from the DC components. The signal power can be auto-correlated, and normalized auto-correlation results which exceed a threshold can be used to determine a Doppler bandwidth of the received signal, which can be used to adaptively adjust filters used for separating the DC components.
摘要翻译：通信系统中的接收信号的SIR（信号与损害功率比）由执行非线性操作的至少两个连续阶段产生的DC分量确定，例如，平均，信号并将DC分量与非直流分量分离供应到下一个阶段。也可以从DC分量确定接收信号的期望信号分量的信号功率。信号功率可以是自动相关的，并且可以使用超过阈值的归一化自相关结果来确定接收信号的多普勒带宽，其可以用于自适应地调整用于分离DC分量的滤波器。

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