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91. 发明授权

US07349488B1 Frequency shift keying signaling for integrated circuits 有权
标题翻译：集成电路的频移键控信号
公开(公告)号：US07349488B1
公开(公告)日：2008-03-25
申请号：US10412533
申请日：2003-04-10
申请人： Michael A. Margolese , James A. Watson
发明人： Michael A. Margolese , James A. Watson
IPC分类号： H04L27/10 , H04L27/12 , H03K9/10
CPC分类号： H04L27/10 , H04L27/02
摘要： The present invention relates to a system for communicating between two integrated circuits (ICs) or within an IC. The ICs are either on the same circuit boards or on different circuit boards with a common backplane. A first integrated circuit has transmitter circuit that generates frequency shift keying signals using digital data and a second integrated circuit has a receiver circuit for recovering the digital data from the frequency shift keying signals.
摘要翻译：本发明涉及用于在两个集成电路（IC）之间或内部进行通信的系统。 IC集成在同一个电路板上，或者在具有公共背板的不同电路板上。第一集成电路具有使用数字数据产生频移键控信号的发射机电路，第二集成电路具有用于从频移键控信号中恢复数字数据的接收机电路。

92. 再颁专利

USRE39983E1 Carrier injecting waveform-based modulation scheme for reducing satellite transponder power requirements and earth terminal antenna size 有权
标题翻译：载波注入基于波形的调制方案，用于减少卫星应答器的功率需求和接地天线尺寸
公开(公告)号：USRE39983E1
公开(公告)日：2008-01-01
申请号：US11203648
申请日：2005-08-12
申请人： Raymond F. Cobb , Michael B. Luntz
发明人： Raymond F. Cobb , Michael B. Luntz
IPC分类号： H04L27/10 , H04L27/20 , H03D3/00
CPC分类号： H04L27/206 , H04L1/004 , H04L25/06 , H04L27/2273 , H04L2027/0067
摘要： A QPSK modulation scheme uses a data spreading mechanism to rob a relatively limited portion of available transmitter power, and inject into the QPSK waveform a prescribed amount of carrier signal power, through which detection and non-regenerative extraction of the carrier at the receiver may be achieved without incurring a signal-to-noise degradation penalty. In addition, the injected carrier-based modulation scheme of the invention may employ high performance forward error correction coding, to significantly reduce the signal power required for achieving a very low energy per bit-to-noise density ratio (Eb/N0)—on the order of one to zero dB.
摘要翻译： QPSK调制方案使用数据扩展机制来抢夺可用发射机功率的相当有限的部分，并将QPSK波形注入规定量的载波信号功率，接收机的载波的检测和非再生提取可以是实现而不会引起信噪比降级损失。此外，本发明的基于载波的调制方案可以采用高性能的前向纠错编码，以显着降低实现每比特噪声密度比非常低的能量所需的信号功率（E / SUB> / N <0 ） - 大约一到零dB。

93. 发明申请

US20070248180A1 RECEIVER FOR OBJECT LOCATING AND TRACKING SYSTEMS AND RELATED METHODS 有权
标题翻译：对象定位和跟踪系统的接收器及相关方法
公开(公告)号：US20070248180A1
公开(公告)日：2007-10-25
申请号：US11696202
申请日：2007-04-04
申请人： Douglas C. Bowman , Huong M. Han
发明人： Douglas C. Bowman , Huong M. Han
IPC分类号： H04L27/10
CPC分类号： G01V15/00
摘要： A communications system, such as part of a real-time location system, includes a transmitter that can be part of a location processor, tag emission reader or tag interrogator that generates a frequency shift key (FSK) modulated wireless communication signal representative of digital data and transmits the communications signal over a wireless communications channel. A receiver such as incorporated within a tag transceiver used in the real-time location system receives the FSK modulated communication signal. The receiver includes a circuit for calculating the magnitude of low and high tones of the FSK modulated communication signal and a threshold for amplitude shift keyed (ASK) channel data and FSK channel data to derive the digital data even in the presence of on-tone jammers in the communications channel.
摘要翻译：诸如实时定位系统的一部分的通信系统包括可以是位置处理器，标签发射读取器或标签询问器的一部分的发射器，其产生代表数字数据的频移键（FSK）调制的无线通信信号并通过无线通信信道发送通信信号。诸如并入在实时定位系统中使用的标签收发机内的接收机接收FSK调制通信信号。该接收机包括用于计算FSK调制通信信号的低音和高音调的幅度的电路以及用于幅移键控（ASK）通道数据和FSK通道数据的阈值，以便即使存在色调干扰的情况也导出数字数据在通信通道中。

94. 发明授权

US07269228B2 Non-coherent frequency shift keying transmitter using a digital interpolation synthesizer 失效
标题翻译：非相干频移键控发射机采用数字插值合成器
公开(公告)号：US07269228B2
公开(公告)日：2007-09-11
申请号：US10605399
申请日：2003-09-29
申请人： David Shiung
发明人： David Shiung
IPC分类号： H04L27/10
CPC分类号： H03C3/00 , H04L27/122
摘要： A non-coherent frequency shift keying transmitter for up-converting a baseband signal to a radio frequency signal is provided. The non-coherent frequency shift keying transmitter applies the interpolation method in a digital frequency synthesizer to replace the conventional Phase Locked Loop (PLL) circuit. The micro processing unit receives a baseband signal firstly, then the baseband signal is converted to a RF signal via a digital synthesizer, a numerical controlled oscillator, a cascaded integrator-comb filter, and a digital-analog converter. The RF signal is then transmitted via a local oscillator, a band-pass filter, a power amplifier, and a transmitting end. This circuit eliminates unnecessary analog devices so that fabrication migration issue is avoided. Further, the modulated RF signal is more stable than that of the conventional modulator, and has a more efficient spectrum control and a better performance on the receiver end. A non-coherent FSK transmitting system is also provided in the present invention.
摘要翻译：提供了一种用于将基带信号上变频到射频信号的非相干频移键控发射器。非相干频移键控发射机将数字频率合成器中的插值方法应用于传统的锁相环（PLL）电路。微处理单元首先接收基带信号，然后通过数字合成器，数控振荡器，级联积分梳梳状滤波器和数模转换器将基带信号转换成RF信号。然后，RF信号经由本地振荡器，带通滤波器，功率放大器和发送端发送。该电路消除了不必要的模拟器件，从而避免了制造迁移问题。此外，调制的RF信号比常规调制器更稳定，并且在接收机端具有更有效的频谱控制和更好的性能。本发明还提供了非相干FSK传输系统。

95. 发明申请

US20070092025A1 Method and apparatus for windowing orthogonal frequency division multiplexed signals 有权
标题翻译：用于加窗正交频分复用信号的方法和装置
公开(公告)号：US20070092025A1
公开(公告)日：2007-04-26
申请号：US11255803
申请日：2005-10-21
申请人： Qi Bi , Sinan Gezici , Lei Song , Yifei Yuan
发明人： Qi Bi , Sinan Gezici , Lei Song , Yifei Yuan
IPC分类号： H04L27/10
CPC分类号： H04L25/03834 , H04L27/2626
摘要： The present invention provides a method of windowing signals in a communication system. The method includes accessing at least one first signal associated with at least one of a plurality of orthogonal frequencies and applying a window function to the at least one first signal to form at least one second signal. The at least one second signal remains substantially orthogonal to signals associated with the plurality of orthogonal frequencies.
摘要翻译：本发明提供了一种在通信系统中加窗信号的方法。该方法包括访问与多个正交频率中的至少一个相关联的至少一个第一信号，并且将至少一个第一信号应用于窗口函数以形成至少一个第二信号。所述至少一个第二信号保持与所述多个正交频率相关联的信号基本正交。

96. 发明申请

US20070058747A1 Phase shifter and current mode mixer 有权
标题翻译：移相器和电流模式混频器
公开(公告)号：US20070058747A1
公开(公告)日：2007-03-15
申请号：US11224609
申请日：2005-09-12
申请人： Ali Afsahi , Arya Behzad
发明人： Ali Afsahi , Arya Behzad
IPC分类号： H04L27/10 , H04L27/18
CPC分类号： H03D7/1441 , H03D7/1458 , H03D2200/0025 , H03D2200/0084 , H04L27/2647
摘要： An integrated circuit radio transceiver comprises an integrated phase shift mixer for generating a phase and frequency shifted output signal to at least a portion of one of a transmitter or receiver front end. The integrated phase shift mixer includes a phase shift block that is operable to produce a phase shifted current signal at an output of the phase shift block and a mixer that is operable to produce the phase and frequency shifted output signal based upon the phase shifted current signal. One aspect of the present invention is that the phase shift block produces an output as a current signal and the mixer block is operably disposed and formed to receive the current signal produced by the phase shift block. Thus, the mixer includes a folded cascode mixer that provides a substantially low input impedance.
摘要翻译：集成电路无线电收发器包括集成相移混频器，用于产生到发射机或接收机前端中的至少一部分的相位和频移输出信号。集成相移混频器包括相移块，其可操作以在相移块的输出处产生相移电流信号，以及混频器，其可操作以基于相移电流信号产生相位和频移输出信号。本发明的一个方面是相移块产生作为电流信号的输出，并且混合器块可操作地设置和形成以接收由相移块产生的电流信号。因此，混频器包括提供基本上低的输入阻抗的折叠共源共栅混合器。

97. 发明授权

US07180964B2 Constellation manipulation for frequency/phase error correction 有权
标题翻译：用于频率/相位误差校正的星座操作
公开(公告)号：US07180964B2
公开(公告)日：2007-02-20
申请号：US10286133
申请日：2002-11-01
申请人： Joerg Borowski , Uwe Eckhardt , Menno Mennenga
发明人： Joerg Borowski , Uwe Eckhardt , Menno Mennenga
IPC分类号： H03D3/22 , H04L27/22 , H04L27/18 , H04L27/10
CPC分类号： H04L27/0014 , H04L2027/0028 , H04L2027/0067
摘要： An error correction technique for data communication receivers such as WLAN (Wireless Local Area Network) receivers is provided. The error correction technique is for correcting a frequency and/or phase error in an incoming digitally modulated signal. A constellation manipulator is provided that is adapted to manipulate the phase constellation system of the incoming digitally modulated system by mapping each constellation point of the phase constellation system to a predefined range of phase angles. The predefined range has a width of less than 2π. Further, an error detector is provided that is connected to receive data from the constellation manipulator. The data pertains to the manipulated phase constellation system. The error detector is adapted to evaluate the data to detect the frequency and/or phase error.
摘要翻译：提供了诸如WLAN（无线局域网）接收机之类的数据通信接收机的纠错技术。误差校正技术用于校正输入的数字调制信号中的频率和/或相位误差。提供了一种星座操纵器，其适于通过将相位星座系统的每个星座点映射到预定义的相位角范围来操纵输入的数字调制系统的相位星座系统。预定范围的宽度小于2pi。此外，提供了一个连接以从星座操纵器接收数据的误差检测器。数据属于操纵相星座系统。误差检测器适于评估数据以检测频率和/或相位误差。

98. 发明申请

US20070030915A1 Receiver Block Providing Signal Quality Information in a Communication System with Signal Constellation not Having multiple Symbols in Same Angle 审中-公开
标题翻译：接收器块提供具有信号星座的通信系统中没有相同角度的多个符号的信号质量信息
公开(公告)号：US20070030915A1
公开(公告)日：2007-02-08
申请号：US11161460
申请日：2005-08-04
申请人： Bijoy Bhukania , Jawaharlal Tangudu , Abhijit Patki
发明人： Bijoy Bhukania , Jawaharlal Tangudu , Abhijit Patki
IPC分类号： H04L5/12 , H04L27/10 , H04L27/22
CPC分类号： H04L27/22 , H04L1/206 , H04L25/067
摘要： An aspect of the present invention provides signal quality information representing the angular deviations (i.e., based on the phase angle difference between the received symbol and the corresponding decoded symbol (i.e., selected symbol point in a signal constellation)). As a result, a relatively more accurate signal quality information is provided to external component at least in systems in which the signal constellation do not have multiple symbols in the same angle. The computational complexity may also be reduced as a result.
摘要翻译：本发明的一个方面提供了表示角度偏差的信号质量信息（即，基于接收符号和对应的解码符号之间的相位角差（即，信号星座中的所选符号点））。结果，至少在信号星座不具有相同角度的多个符号的系统中，向外部组件提供相对更准确的信号质量信息。结果也可能减少计算复杂度。

99. 发明申请

US20060280258A1 Modulator and method for producing a modulated signal 有权
标题翻译：用于产生调制信号的调制器和方法
公开(公告)号：US20060280258A1
公开(公告)日：2006-12-14
申请号：US11450513
申请日：2006-06-12
申请人： Ido Bettesh
发明人： Ido Bettesh
IPC分类号： H04L27/10
CPC分类号： H03C3/095 , H03C3/0958 , H04L27/2014
摘要： A modulator including a direct modulation synthesizer circuit, a reference frequency oscillator for providing an input reference signal to the direct modulation synthesizer circuit for locking a carrier frequency to a stable frequency and a pre-emphasis unit for receiving data bits and for producing a modulating signal for direct modulation of the direct modulation synthesizer circuit, the modulating signal having data bit dependent voltage levels.
摘要翻译：一种调制器，包括直接调制合成器电路，用于向直接调制合成器电路提供输入参考信号以将载波频率锁定到稳定频率的参考频率振荡器，以及用于接收数据位并产生调制信号的预加重单元对于直接调制合成器电路的直接调制，具有数据位相关电压电平的调制信号。

100. 发明授权

US07095794B2 Methods and apparatus for a spread spectrum modulated backscatter electronic shelf label system 有权
公开(公告)号：US07095794B2
公开(公告)日：2006-08-22
申请号：US10036218
申请日：2001-10-23
申请人： Albertus Maria Gerardus Claessen
发明人： Albertus Maria Gerardus Claessen
IPC分类号： H04L27/10 , H04B1/69
CPC分类号： H04B1/707 , G06K7/0008
摘要： Techniques for an electronic shelf label (ESL) system which uses a digital modulation technique for a modulated backscatter uplink from an ESL to a communication base station (CBS) which utilizes pseudo-random sequences instead of a single continuous wave frequency. The CBS transmits a message to an ESL using a Manchester coded amplitude modulated carrier. After receiving the message, the ESL responds by reflectively modulating a continuous wave (CW) signal with a pseudo-random code sequence. Multiple pseudo-random code sequences may be chosen, with each code sequence corresponding to a particular response. The code sequence is modulated onto a kHz carrier which is used to reflectively modulate the CW signal received from the CBS. The CBS then receives the reflectively modulated signal and correlates the received signal to determine message transmitted.

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