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91. 发明授权

US07280619B2 Method and apparatus for compensating I/Q imbalance in receivers 有权
标题翻译：用于补偿接收机I / Q不平衡的方法和装置
公开(公告)号：US07280619B2
公开(公告)日：2007-10-09
申请号：US10746550
申请日：2003-12-23
申请人： Elias Nemer , Ahmed Said
发明人： Elias Nemer , Ahmed Said
IPC分类号： H03D3/00 , H03D1/04 , H04B1/00 , H04B15/00 , H03K5/159
CPC分类号： H04L27/3863 , H03D3/009 , H04L27/3872 , H04L2027/0024
摘要： A method and apparatus for compensating I/Q imbalance in receivers is described. The method includes determining a difference between energies of two quadratures, correcting an amplitude imbalance using the difference between the energies of two quadratures, determining a cross-correlation between the two quadratures, and correcting a phase imbalance using the cross-correlation between the two quadratures.
摘要翻译：描述了用于补偿接收机中的I / Q不平衡的方法和装置。该方法包括确定两个正交的能量之间的差异，使用两个正交能量之间的差校正幅度不平衡，确定两个正交之间的互相关，以及使用两个正交之间的互相关来校正相位不平衡。

92. 发明授权

US07277501B2 Data receiving device 有权
标题翻译：数据接收装置
公开(公告)号：US07277501B2
公开(公告)日：2007-10-02
申请号：US10640655
申请日：2003-08-14
申请人： Kenichi Mori , Yoshio Urabe , Koichiro Tanaka , Hideki Nakahara , Hitoshi Takai
发明人： Kenichi Mori , Yoshio Urabe , Koichiro Tanaka , Hideki Nakahara , Hitoshi Takai
IPC分类号： H03D3/00 , H03K9/06
CPC分类号： H04L27/2331 , H04L5/06
摘要： A data receiving device is provided enabling a reduction in the time required for extracting a partial band signal, and capable of being easily made in a simple structure as an LSI device without requiring a plurality of analog circuits having the same characteristics. The data receiving device includes: a first sampler for sampling an in-phase signal I(t) at every predetermined sampling period and outputting the sampled in-phase signal; a second sampler for sampling a quadrature signal at every predetermined sampling period and outputting the sampled quadrature signal; a partial band extracting section structured by a complex filter for extracting partial band signals IBr, QBr from frequency components included in the sampled in-phase signal and the sampled quadrature signal; and first and second delay detection operating sections for performing a delay detecting process based on the partial band signals and outputting detection signals.
摘要翻译：提供一种数据接收装置，其能够减少提取部分频带信号所需的时间，并且能够容易地以简单的结构作为LSI装置，而不需要具有相同特性的多个模拟电路。数据接收装置包括：第一采样器，用于在每个预定采样周期对同相信号I（t）进行采样，并输出采样的同相信号; 第二取样器，用于在每个预定采样周期对正交信号进行采样，并输出采样的正交信号; 由复数滤波器构成的部分频带提取部分，用于从包括在采样的同相信号中的频率分量和采样的正交信号中提取部分频带信号IB，QB＆lt; SUB＆lt; ; 以及第一和第二延迟检测操作部分，用于基于部分频带信号执行延迟检测处理并输出检测信号。

93. 发明授权

US07263139B1 Phase correction for a phase modulated signal with mutually interfering symbols 有权
标题翻译：具有相互干扰符号的相位调制信号的相位校正
公开(公告)号：US07263139B1
公开(公告)日：2007-08-28
申请号：US10646101
申请日：2003-08-22
申请人： Samuel C. Kingston , Osama Sami Haddadin , William K. McIntire
发明人： Samuel C. Kingston , Osama Sami Haddadin , William K. McIntire
IPC分类号： H03D3/24 , H03D3/00 , H04L27/22
CPC分类号： H04L27/2272 , H04L7/0054 , H04L7/0083 , H04L2027/0055
摘要： A circuit and method for correcting phase of a received phase modulated (PM) signal. The method uses k most recently received data bits, which alternate between in-phase I and quadrature Q bits, as an address for a lookup table 60. The lookup table outputs a phase figure 62 derived from a reconstructed waveform. When the most recent k bit is a Q bit, the complement 68 of the phase figure 62 is calculated to yield a phase correction. Otherwise, the phase figure is the phase correction, which is applied to adjust the phase of a delayed version of the received signal. The delayed, phase adjusted signal is then applied to correct the phase of a received signal. The circuit splits an input PM signal in parallel between a matched filter 54 and a delay block 76, 88. The matched filter output provides the input to a register 58 for storing the k data bits. The delay block holds the PM signal until it is input into a loop phase shifter 78 synchronously with the phase correction. The output of the loop phase filter is input, after filtering, to a primary phase shifter 52 that adjusts phase of a received PM signal.
摘要翻译：一种用于校正接收相位调制（PM）信号的相位的电路和方法。该方法使用k个最近接收的数据位，其在同相I和正交Q位之间交替，作为查找表60的地址。查找表输出从重构波形得出的相位图62。当最近的k位是Q位时，相位图62的补码68被计算以产生相位校正。否则，相位图是相位校正，其用于调整接收信号的延迟版本的相位。然后施加延迟的相位调整信号以校正接收信号的相位。电路将输入PM信号并入匹配滤波器54和延迟块76,88之间。匹配滤波器输出将输入提供给寄存器58以存储k个数据位。延迟块保持PM信号，直到其与相位校正同步地输入到环路移相器78中。滤波后的环路相位滤波器的输出被输入到调整接收到的PM信号的相位的主移相器52。

94. 发明授权

US07254187B2 Narrow band chaotic bi-phase shift keying 失效
标题翻译：窄带混沌双相移键控
公开(公告)号：US07254187B2
公开(公告)日：2007-08-07
申请号：US10478180
申请日：2002-05-17
申请人： Chandra Mohan , Jeffrey Huat-Chye Lee
发明人： Chandra Mohan , Jeffrey Huat-Chye Lee
IPC分类号： H03D3/00 , H04L27/00 , G05B13/02
CPC分类号： H04L27/001
摘要： A system and method for signal transmission and reception by narrow band chaotic bi-phase shift keying includes a forward error correction encoder for receiving input data, a data packetizer in signal communication with the forward error correction encoder, a compression encoder in signal communication with the data packetizer, a radio frequency link in signal communication with the compression encoder, a compression decoder in signal communication with the radio frequency link, a data depacketizer in signal communication with the compression decoder, and a forward error correction decoder in signal communication with the data depacketizer for recovering the input data by controlling the orbits of chaos; where the method includes the steps of transmitting a signal indicative of chaotic bi-phase shift keyed data, propagating the transmitted signal within a narrow frequency band, and receiving the propagated signal substantially without degradation of the indicated data by controlling the orbits of chaos.
摘要翻译：用于通过窄带混沌双相移键控进行信号发送和接收的系统和方法包括用于接收输入数据的前向纠错编码器，与前向纠错编码器进行信号通信的数据分组器，与数据分组器，与压缩编码器进行信号通信的射频链路，与射频链路信号通信的压缩解码器，与压缩解码器进行信号通信的数据解包器，以及与数据进行信号通信的前向纠错解码器解包器，用于通过控制混沌轨道来恢复输入数据; 其中该方法包括以下步骤：发送指示混沌双相移键控数据的信号，在窄频带内传播发射信号，并通过控制混沌轨迹基本上不损坏所指示的数据。

95. 发明授权

US07248649B2 Digital baseband receiver including a time domain compensation module for suppressing group delay variation distortion incurred due to analog low pass filter deficiencies 失效
标题翻译：数字基带接收机包括用于抑制由于模拟低通滤波器缺陷而引起的组延迟变化失真的时域补偿模块
公开(公告)号：US07248649B2
公开(公告)日：2007-07-24
申请号：US10749634
申请日：2003-12-31
申请人： Alpaslan Demir , Leonid Kazakevich , Tanbir Haque
发明人： Alpaslan Demir , Leonid Kazakevich , Tanbir Haque
IPC分类号： H03D3/00 , H03K9/06
CPC分类号： H04L27/38 , H04L27/22
摘要： A digital baseband (DBB) radio frequency (RF) receiver used for receiving and processing a wireless communication signal. The DBB receiver includes a demodulator, first and second analog low pass filters (LPFs), first and second digital gain control circuits, and a digital time domain compensation module which removes group delay variation distortion, introduced by the first and second analog LPFs, from real and imaginary signal components of the communication signal.
摘要翻译：用于接收和处理无线通信信号的数字基带（DBB）射频（RF）接收机。 DBB接收机包括解调器，第一和第二模拟低通滤波器（LPF），第一和第二数字增益控制电路以及数字时域补偿模块，其将由第一和第二模拟LPF引入的群延迟变化失真从通信信号的实信号分量和虚信号。

96. 发明申请

US20070153941A1 METHOD AND APPARATUS FOR COORDINATING TRANSMISSION OF SHORT MESSAGES WITH HARD HANDOFF SEARCHES IN A WIRELESS COMMUNICATIONS SYSTEM 有权
标题翻译：在无线通信系统中协调传输短消息与硬切换的方法和装置
公开(公告)号：US20070153941A1
公开(公告)日：2007-07-05
申请号：US11681630
申请日：2007-03-02
申请人： Edward Tiedemann , Olivier Glauser
发明人： Edward Tiedemann , Olivier Glauser
IPC分类号： H03D3/00
CPC分类号： H04W36/0088 , H04W36/14 , H04W52/56
摘要： A method and apparatus for coordinating the time at which a mobile station performs searches for alternative systems to which a hard handoff will occur. The mobile station receives a command which instructs the mobile station as to when to tune to alternative frequencies in order to search for indicates of the presence of an alternative system. In another system which includes the present invention, predetermined times are defined with respect to a reference point in time that is common to both the origination base station and a mobile station. The mobile station tunes to alternative frequencies to perform searches only during these predetermined times. In addition, the mobile station coordinates the transmission of reports, which indicate the results of searches for alternative systems such that these reports are only transmitted from the mobile station when the mobile station is tuned to the origination frequency.
摘要翻译：一种用于协调移动台执行搜索将发生硬切换的替代系统的时间的方法和装置。移动台接收指示移动台何时调谐到替代频率的命令，以便搜索替代系统的存在的指示。在包括本发明的另一系统中，相对于起始基站和移动台两者共同的参考时间点来定义预定时间。移动台调谐到替代频率，以在这些预定时间内执行搜索。此外，移动台协调报告的传输，其指示对替代系统的搜索的结果，使得当移动台被调谐到发起频率时，这些报告仅从移动台发送。

97. 发明申请

US20070109041A1 FM DETECTOR CIRCUIT 失效
标题翻译： FM检测电路
公开(公告)号：US20070109041A1
公开(公告)日：2007-05-17
申请号：US11616908
申请日：2006-12-28
申请人： Akira KATO
发明人： Akira KATO
IPC分类号： H03D3/00
CPC分类号： H03D3/26 , H03D2200/0023 , H03H11/32 , H04L27/148
摘要： An FM detector circuit includes an unbalanced/balanced conversion circuit, a signal synthesis circuit, a parallel circuit including a first diode connected between a first balanced output terminal of the unbalanced/balanced conversion circuit and one signal input terminal of the signal synthesis circuit and a resonator, a parallel circuit including a second diode connected between a second balanced output terminal of the unbalanced/balanced conversion circuit and the other signal input terminal of the signal synthesis circuit and a capacitor element, and a low-pass filter connected to an output terminal of the signal synthesis circuit.
摘要翻译： FM检测器电路包括不平衡/平衡转换电路，信号合成电路，并联电路，包括连接在不平衡/平衡转换电路的第一平衡输出端和信号合成电路的一个信号输入端之间的第一二极管和谐振器，包括连接在不平衡/平衡转换电路的第二平衡输出端子和信号合成电路的另一个信号输入端子之间的第二二极管和电容器元件的并联电路以及连接到输出端子的低通滤波器的信号合成电路。

98. 发明申请

US20070076820A1 Communication system with demodulation of two-level differential amplitude-shift-keying signals 有权
标题翻译：具有两级差分振幅键控信号解调的通信系统
公开(公告)号：US20070076820A1
公开(公告)日：2007-04-05
申请号：US11321858
申请日：2005-12-28
申请人： Chih-Yang Kao , Ching-Yung Chen , Yung-Hua Hung
发明人： Chih-Yang Kao , Ching-Yung Chen , Yung-Hua Hung
IPC分类号： H03D3/00
CPC分类号： H03D1/04
摘要： A structure and method for demodulating two-level differential amplitude-shift-keying signals using simple adding operations are provided. Threshold values are dynamically adjusted according to the channel response. By comparing the threshold values and the differential amplitude values, it can be found whether the amplitude of the received signal is changed. Furthermore, it no needs to know the changed value of received signal amplitudes and the differential two-level amplitude-shift-keying signals can be demodulated by just detecting whether the amplitude of the received signal is changed. By this idea, the complexity of the receiver implementation is simplified and the demodulator can get better performance.
摘要翻译：提供了使用简单的添加操作来解调两级差分幅度移位键控信号的结构和方法。阈值根据通道响应进行动态调整。通过比较阈值和差分幅度值，可以发现接收信号的振幅是否改变。此外，不需要知道接收信号幅度的变化的值，并且可以通过仅检测接收信号的幅度是否改变来解调差分两电平振幅键控信号。通过这种想法，简化了接收机实现的复杂度，解调器可以获得更好的性能。

99. 发明授权

US07154974B2 Data recovery system and applications thereof in radio receivers 失效
公开(公告)号：US07154974B2
公开(公告)日：2006-12-26
申请号：US10074294
申请日：2002-02-12
申请人： Henrik Jensen , Brima Ibrahim
发明人： Henrik Jensen , Brima Ibrahim
IPC分类号： H04L7/00 , H03D3/00
CPC分类号： H04B1/406
摘要： A method and apparatus for data recovery includes processing that begins by receiving an encoded signal at a transmit symbol rate. Such an encoded signal includes data that is represented by positive and negative pulses. The processing continues by determining at least one reference crossing of the encoded signal (e.g., detecting a 0 crossing). The processing then continues by determining a sampling phase of a system symbol rate based on the reference crossing. The processing then continues by sampling the encoded signal at the determined sampling phase with respect to the system symbol rate to recapture the data.

100. 发明授权

US07129794B2 Phase detector for reducing noise 有权
公开(公告)号：US07129794B2
公开(公告)日：2006-10-31
申请号：US10623959
申请日：2003-07-21
申请人： Feng Lin
发明人： Feng Lin
IPC分类号： H03D3/00
CPC分类号： H03L7/0814 , H03L7/07 , H03L7/089
摘要： The present invention provides a method and an apparatus for reducing noise. The apparatus includes a phase detector adapted to determine a phase difference between a first and a second signal, a first circuit adapted to generate a control signal based upon the determined phase difference, and a second circuit. The second circuit is adapted to receive a third signal, receive a fourth signal, modify the fourth signal based upon the control signal, and provide the third signal and the modified fourth signal to the phase detector as the first and second signals.

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