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1. 发明授权

US5818000A Three-way switch for protection of a power amplifier during antenna disconnection 失效
标题翻译：天线断开期间功率放大器保护的三路开关
公开(公告)号：US5818000A
公开(公告)日：1998-10-06
申请号：US844503
申请日：1997-04-18
申请人： Yawei Ma , Xue-Song Zhou
发明人： Yawei Ma , Xue-Song Zhou
IPC分类号： H01H1/26 , H01P1/12 , H01R19/00
CPC分类号： H01P1/12 , H01H1/26
摘要： A three-way switch for individually connecting either a dummy load, a first antenna, or a second antenna to a radio transmitter power amplifier output. The switch includes a first member connected to a dummy load and a second flexible member fixed in position relative to the first member and biased against the first member so as to make an electrical connection between the first and second member. The second member is connected to the radio transmitter output and includes two contact areas for connecting to a first and a second antenna. When a first antenna is applied against the first contact area, the transmitter is disconnected from the dummy load and only the first antenna is connected to the transmitter output. When a second antenna is applied to the second contact area the flexible member of the switch disconnects from the first antenna and only the second antenna is connected to the transmitter output.
摘要翻译：用于将虚拟负载，第一天线或第二天线单独连接到无线电发射机功率放大器输出的三路开关。开关包括连接到假负载的第一构件和相对于第一构件固定在适当位置的第二柔性构件，并且抵靠第一构件偏压，以便在第一构件和第二构件之间形成电连接。第二构件连接到无线电发射机输出，并包括用于连接到第一和第二天线的两个接触区域。当将第一天线施加到第一接触区域时，发射器与虚拟负载断开，并且仅第一天线连接到发射器输出端。当第二天线被施加到第二接触区域时，开关的柔性构件与第一天线断开，并且仅第二天线连接到发射器输出。

2. 发明授权

US06882678B2 Method and system for canceling multiple access interference in CDMA wireless communication system 有权
标题翻译： CDMA无线通信系统中消除多址干扰的方法和系统
公开(公告)号：US06882678B2
公开(公告)日：2005-04-19
申请号：US09728459
申请日：2000-12-01
申请人： Ning Kong , Xue-Song Zhou
发明人： Ning Kong , Xue-Song Zhou
IPC分类号： H04K1/00 , H04L27/30
CPC分类号： H04B1/712 , H04B1/7107 , H04B7/0845 , H04B7/0857 , H04B7/0897
摘要： A receiver for the third-generation (“3G”) CDMA wireless system is disclosed. The receiver is adapted to mitigate the correlated interference by adaptive antenna process which will maximize the signal-to-interference-plus-noise ratio. After the mitigation of correlated interference from first step space process, the second step is to counter fading with MRC which is optimum after the mitigation of correlated interference. After these first two steps of interference mitigation by adaptive antennas and fading compensation through MRC, the decision signal for the first stage of MPIC will have the strongest desired part and least interference compared to any MPIC available. As can be appreciated, the first stage BER of the present receiver will be the lowest. Then, this low BER will result in a more accurate MAI regeneration, which will further cause a lower BER for the next stage and any subsequent stages. Therefore, the BER of the receiver of the present invention is more likely to converge to the BER of a single user, i.e. MAI-free, faster than those in the conventional systems. In other words, for a given BER requirement, the receiver of the present invention will take the least number of iterations to achieve.
摘要翻译：公开了第三代（“3G”）CDMA无线系统的接收机。接收机适用于通过自适应天线处理来减轻相关干扰，这将使信号与干扰加噪声比达到最大。在缓解来自第一阶段空间过程的相关干扰之后，第二步是在缓解相关干扰之后，用最适合的MRC对抗衰落。在通过自适应天线进行干扰减轻的前两个步骤和通过MRC进行衰落补偿之后，与可用的任何MPIC相比，MPIC的第一级的判决信号将具有最强的期望部分和最小的干扰。可以理解，本接收机的第一级BER将是最低的。然后，这个低BER将导致更准确的MAI再生，这将进一步导致下一阶段和任何后续阶段的较低BER。因此，本发明的接收机的BER比常规系统中更容易收敛到单个用户的BER，即无MAI。换句话说，对于给定的BER要求，本发明的接收机将获得最少的迭代次数来实现。

3. 发明授权

US5740522A Method and apparatus for reducing receive band transmitter-chain noise for a portable duplex transceiver 失效
标题翻译：用于减少便携式双工收发器的接收频带发射机链噪声的方法和装置
公开(公告)号：US5740522A
公开(公告)日：1998-04-14
申请号：US503027
申请日：1995-07-17
申请人： Rodney A. Dolman , Ross W. Lampe , Xue-Song Zhou
发明人： Rodney A. Dolman , Ross W. Lampe , Xue-Song Zhou
IPC分类号： H03B1/00 , H04B1/04
CPC分类号： H04B1/0475 , H03B2201/0208
摘要： Reduction of transmitter exciter chain generated noise from the receive bank of a portable/hand-held duplex transceiver is achieved using a high output power, low-noise voltage-controlled-oscillator (VCO) in the transmitter exciter chain. Using this high-power, low-noise oscillator as the RF source in the transmitter exciter chain precludes the need for the conventional buffer/driver amlplifier stage and an associated inter-stage noise filter. Elimination of buffer/driver stage components and bulky inter-stage noise filter components allows complete integration of transmitter exciter chain components resulting in reduced size and cost.
摘要翻译：使用发射机激励器链中的高输出功率低噪声压控振荡器（VCO）来实现从便携式/手持双工收发器的接收组中减少发射机激励器链产生的噪声。使用这种高功率，低噪声振荡器作为发射机激励器链中的RF源，排除了传统的缓冲器/驱动器放大器级和相关的级间噪声滤波器的需要。消除缓冲器/驱动器级元件和庞大的级间噪声滤波器元件允许发射机激励器链组件的完全集成，从而减小尺寸和成本。

4. 发明授权

US5838207A Voltage controlled oscillator with partial load-pull tuning 失效
标题翻译：具有部分负载 - 牵引调谐的压控振荡器
公开(公告)号：US5838207A
公开(公告)日：1998-11-17
申请号：US770889
申请日：1996-12-20
申请人： Xue-Song Zhou , Scott Richard Justice
发明人： Xue-Song Zhou , Scott Richard Justice
IPC分类号： H03B5/12 , H03L7/099 , H03L7/183
CPC分类号： H03L7/099 , H03B5/1203 , H03B5/1231 , H03B5/1243 , H03L7/183
摘要： A voltage controlled oscillator has an active circuit, a resonant circuit coupled to the input node of the active circuit and an adjustable impedance circuit coupled to an output node of the active circuit. The impedance of the adjustable impedance circuit may be altered to tune the oscillation frequency of the oscillator. In one embodiment, the adjustable impedance circuit includes a varactor diode in series with a capacitor and means for varying the voltage across the varactor diode. An isolation circuit is coupled to an output node of the active circuit. In one embodiment, the isolation circuit is connected to a different output node than the adjustable impedance circuit is connected to.
摘要翻译：压控振荡器具有有源电路，耦合到有源电路的输入节点的谐振电路和耦合到有源电路的输出节点的可调阻抗电路。可调节阻抗电路的阻抗可调整振荡器的振荡频率。在一个实施例中，可调阻抗电路包括与电容器串联的变容二极管和用于改变变容二极管两端的电压的装置。隔离电路耦合到有源电路的输出节点。在一个实施例中，隔离电路连接到与可调节阻抗电路连接的不同的输出节点。

5. 发明授权

US5714914A High-power low-noise voltage-controlled oscillator 失效
标题翻译：大功率低噪声压控振荡器
公开(公告)号：US5714914A
公开(公告)日：1998-02-03
申请号：US395882
申请日：1995-02-28
申请人： Xue-Song Zhou
发明人： Xue-Song Zhou
IPC分类号： H03B5/02 , H03B1/04 , H03B5/12 , H03B5/18
CPC分类号： H03B5/1847 , H03B5/1203 , H03B5/1231 , H03B5/1243 , H03B2202/03
摘要： A high power, low noise voltage-controlled oscillator (VCO) eliminates the drive-stage amplifier and costly surface-acoustic wave (SAW) inter-stage filter in a transmitter such as a cellular radiotelephone. The VCO includes a resonant circuit, an active part connected to the resonant circuit, and a buffer amplifier, connected to the active part, for isolating the VCO from a load connected to the buffer amplifier. The active part includes at least one transistor in a Colpitts configuration; capacitances connected in parallel with junction capacitances of the transistor, each capacitance having a value that is greater than a value of the respective junction capacitance with which it is connected in parallel; and a resistance for providing negative feedback at low frequencies. A second resistance may be provided for reducing the gain of the active part when oscillation starts. The buffer amplifier is a linear amplifier including a transistor, and the active part and the buffer amplifier may be connected by a capacitance for reducing coupling between the active part and the buffer amplifier.
摘要翻译：高功率，低噪声压控振荡器（VCO）消除了诸如蜂窝无线电话之类的发射机中的驱动级放大器和昂贵的表面声波（SAW）级间滤波器。 VCO包括谐振电路，连接到谐振电路的有源部分和连接到有源部分的缓冲放大器，用于将VCO与连接到缓冲放大器的负载隔离。有源部分包括至少一个Colpitts配置的晶体管; 电容与晶体管的结电容并联连接，每个电容的值大于并联连接的各个结电容的值; 以及在低频下提供负反馈的电阻。可以提供第二电阻用于在振荡开始时减小有效部分的增益。缓冲放大器是包括晶体管的线性放大器，并且有源部分和缓冲放大器可以通过用于减少有源部分和缓冲放大器之间的耦合的电容来连接。

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