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81. 发明授权

US08249198B2 Demodulation circuit of differential phase shift keying (DPSK) modulated signals 失效
标题翻译：差分相移键控（DPSK）调制信号解调电路
公开(公告)号：US08249198B2
公开(公告)日：2012-08-21
申请号：US12366960
申请日：2009-02-06
申请人： Takashi Tsuwa
发明人： Takashi Tsuwa
IPC分类号： H03D3/22
CPC分类号： H04L27/2331
摘要： A demodulation circuit demodulates a differential phase shift keying (DPSK) modulated received signal. A phase difference data generator compares phase data representing a phase of the received signal input at every predetermined sampling time with previous phase data preceding by one symbol time to generate phase difference data representing a phase shift amount of the phase data. A symbol selection unit evaluates the phase difference data generated at every sampling time to select as a symbol.
摘要翻译：解调电路解调差分相移键控（DPSK）调制接收信号。相位差数据发生器将表示在每个预定采样时间输入的接收信号的相位的相位数据与之前一个符号时间的先前相位数据进行比较，以产生表示相位数据的相移量的相位差数据。符号选择单元评估在每个采样时间生成的相位差数据以选择作为符号。

82. 发明授权

US08194793B2 Multi-stage frequency offset estimation and compensation method and its circuit 有权
标题翻译：多级频偏估计及补偿方法及其电路
公开(公告)号：US08194793B2
公开(公告)日：2012-06-05
申请号：US12697612
申请日：2010-02-01
申请人： Syang-Myau Hwang , Chun Chin Chen
发明人： Syang-Myau Hwang , Chun Chin Chen
IPC分类号： H03D3/22 , H04L27/22 , H04L27/18 , H03D3/00 , H03K9/06
CPC分类号： H04L27/0014 , H04L27/22
摘要： A multi-stage frequency offset (FO) estimation and compensation method and its circuit are described. The method includes performing at least a stage of primary-level FO estimation and compensation procedure, and a stage of advance-level FO estimation and compensation procedure. The first stage receives an input carrier signal of a larger FO and outputs a corrected carrier signal with an estimation error within the required estimation range of the next stage, to the next stage. Generated and fed forward stage-by-stage, the corrected carrier signal free of FO may be approached. Besides, since a feed-forward rather than a closed-loop approach is employed, the SNR requirement may be lower. Also, at primary-level, modulation may be first removed so the whole input carrier signal may be used to estimate FO; at advance-level, the periodic PN sequence in the input carrier signal may be utilized to estimate FO, thereby no dedicated training symbols are required.
摘要翻译：描述了多级频偏（FO）估计和补偿方法及其电路。该方法包括执行初级FO估计和补偿过程的至少一个阶段，以及提前级FO估计和补偿程序的阶段。第一级接收较大FO的输入载波信号，并将具有估计误差的校正载波信号输出到下一级的所需估计范围内，到下一级。生成和逐级前馈，可以接近没有FO的校正载波信号。此外，由于采用前馈而不是闭环方式，因此SNR要求可能较低。此外，在初级时，可以首先去除调制，使得整个输入载波信号可以用于估计FO; 在提前级，输入载波信号中的周期性PN序列可用于估计FO，从而不需要专用的训练符号。

83. 发明授权

US08155241B2 System for processing common gain values 有权
标题翻译：用于处理常用增益值的系统
公开(公告)号：US08155241B2
公开(公告)日：2012-04-10
申请号：US12196724
申请日：2008-08-22
申请人： Timothy Perrin Fisher-Jeffes
发明人： Timothy Perrin Fisher-Jeffes
IPC分类号： H03D3/22 , H04L27/22
CPC分类号： H04L27/3809
摘要： A method includes receiving data elements representative of constellation points of a modulated signal. Each data element includes a gain. The method also includes identifying a common gain value among the received data elements, and adjusting the data elements to include the common gain value.
摘要翻译：一种方法包括接收表示调制信号的星座点的数据元素。每个数据元素包括增益。该方法还包括识别所接收的数据元素中的公共增益值，以及调整数据元素以包括公共增益值。

84. 发明授权

US08139689B2 Hierarchical offset compensation to improve synchronization and performance 有权
标题翻译：分层偏移补偿，以提高同步和性能
公开(公告)号：US08139689B2
公开(公告)日：2012-03-20
申请号：US12079782
申请日：2008-03-28
申请人： Carl Scarpa , Edward Schell
发明人： Carl Scarpa , Edward Schell
IPC分类号： H03D3/22
CPC分类号： H04L27/2271 , H04L27/183
摘要： Systems and methods for removing phase shifts due to hierarchical modulation to improve synchronization and performance in legacy and hierarchical decoders are presented. To compensate for the effects of hierarchical modulation, such methods include receiving an I,Q symbol that has been further modulated by an overlay phase shift, detecting the direction of the overlay phase shift, de-rotating the symbol by a defined angle corresponding to the overlay phase shift and said direction; and passing the symbol to legacy synchronization and forward error correction decoding stages after said de-rotating. An exemplary receiver can be provided to implement the disclosed methods.
摘要翻译：提出了用于消除由分级调制引起的相移以改善传统和分层解码器中的同步和性能的系统和方法。为了补偿分级调制的影响，这种方法包括接收已经被覆盖相移进一步调制的I，Q符号，检测叠加相移的方向，将符号去旋转与覆盖相移和所述方向; 并且在所述去旋转之后将符号传递到传统同步和前向纠错解码阶段。可以提供示例性接收机来实现所公开的方法。

85. 发明授权

US08139688B1 Differential receiver with frequency offset compensation 有权
标题翻译：带偏移补偿的差分接收机
公开(公告)号：US08139688B1
公开(公告)日：2012-03-20
申请号：US12893926
申请日：2010-09-29
申请人： Songping Wu , Hui-Ling Lou
发明人： Songping Wu , Hui-Ling Lou
IPC分类号： H03D3/22
CPC分类号： H04L27/2332 , H03J7/02
摘要： A differential receiver which provides for estimation and tracking of frequency offset, together with compensation for the frequency offset. Estimation and tracking of the frequency offset is undertaken in the phase domain, which reduces computational complexity and allows frequency offset estimation and tracking to be accomplished by sharing already-existing components in the receiver. Compensation for the frequency offset can be performed either in the time domain, before differential detection, or in the phase domain, after demodulation, or can be made programmably selectable, for flexibility.
摘要翻译：一种差分接收机，用于频率偏移的估计和跟踪，以及对频偏的补偿。在相位域中进行频率偏移的估计和跟踪，这降低了计算复杂度，并且通过共享接收器中已存在的组件来实现频偏估计和跟踪。频率偏移的补偿可以在时域，差分检测之前或在相位域中，在解调之后执行，或者可以被编程地选择，以实现灵活性。

86. 发明授权

US08093943B2 Phase noise correction device and its method 有权
标题翻译：相位噪声校正装置及其方法
公开(公告)号：US08093943B2
公开(公告)日：2012-01-10
申请号：US12526983
申请日：2008-02-06
申请人： Jungo Arai
发明人： Jungo Arai
IPC分类号： H03D3/22 , H03D3/24
CPC分类号： H04B1/0475 , H03F1/3247 , H03F3/24 , H03F2200/451 , H03F2201/3231
摘要： A phase noise correction device having a function for accurately detecting a phase noise component and capable of reducing a load on a reception device is provided. A phase noise correction device for correcting a phase noise generated in a local oscillator includes: a division section that divides a signal generated in the local oscillator; a reference signal generation section that generates a signal of the same frequency as that of the divided signal; a phase difference detection section that detects a phase difference between the divided signal and the generated reference signal; and a phase noise correction section that gives a phase rotation to a baseband signal in the direction that cancels the phase noise according to the detected phase difference as a phase noise component.
摘要翻译：本发明提供一种具有精度检测相位噪声成分并能够减小接收装置的负荷的功能的相位噪声校正装置。用于校正在本地振荡器中产生的相位噪声的相位噪声校正装置包括：划分部分，其分割在本地振荡器中产生的信号; 参考信号生成部，生成与分频信号相同频率的信号; 相位差检测部，检测所述分频信号与所生成的基准信号之间的相位差; 以及相位噪声校正部，其根据所检测的相位差，将抵消相位噪声的方向的基带信号进行相位旋转，作为相位噪声分量。

87. 发明授权

US07835477B2 Noise canceller and AM receiving apparatus using the same 有权
标题翻译：噪声消除器和使用其的AM接收装置
公开(公告)号：US07835477B2
公开(公告)日：2010-11-16
申请号：US11734760
申请日：2007-04-12
申请人： Jun Suzuki
发明人： Jun Suzuki
IPC分类号： H03D3/22 , H04B1/10
CPC分类号： H03D1/04 , H04B15/00
摘要： A noise canceller that a receiving signal received by a receiving antenna is input to, the noise canceller removing a pulse noise superimposed on the receiving signal to output the signal, the noise canceller comprising: a pulse noise detecting unit that detects the pulse noise superimposed on the receiving signal; a reception level detecting unit that detects the level of the receiving signal; a level hold unit that is triggered by the detection of the pulse noise with the pulse noise detecting unit to hold the level of the receiving signal in a process on the preceding stage of the output; and a level hold period setting unit that sets the level hold period when the level is held in the level hold unit in accordance with the level of the receiving signal detected by the reception level detecting unit.
摘要翻译：输入由接收天线接收到的接收信号的噪声消除器，噪声消除器去除叠加在接收信号上的脉冲噪声以输出信号，噪声消除器包括：脉冲噪声检测单元，其检测叠加在接收信号; 接收电平检测单元，其检测接收信号的电平; 电平保持单元，其通过脉冲噪声检测单元检测脉冲噪声触发，以在输出的前一级的处理中保持接收信号的电平; 以及电平保持期间设定单元，其根据由接收电平检测单元检测到的接收信号的电平，将电平保持在电平保持单元中的电平保持期间设定。

88. 发明授权

US07778361B1 Feed forward method for NICAM decode 有权
标题翻译： NICAM解码的前馈方法
公开(公告)号：US07778361B1
公开(公告)日：2010-08-17
申请号：US11206408
申请日：2005-08-17
申请人： Steven R. Jahnke , Mikio Takano
发明人： Steven R. Jahnke , Mikio Takano
IPC分类号： H03D3/22
CPC分类号： H04L27/2276
摘要： A method and apparatus for decoding digital quadrature phase shift keying data includes converting and intermediate frequency signal from an analog signal to a digital signal and digitally processing the digital signal to detect and decode the digital quadrature phase shift keying and extract encoded data.
摘要翻译：用于解码数字正交相移键控数据的方法和装置包括从模拟信号到数字信号的转换和中频信号，并对数字信号进行数字处理，以检测和解码数字正交相移键控并提取编码数据。

89. 发明授权

US07764937B2 Frequency error estimation and correction 有权
标题翻译：频率误差估计和校正
公开(公告)号：US07764937B2
公开(公告)日：2010-07-27
申请号：US12235757
申请日：2008-09-23
申请人： Aleksej Makarov
发明人： Aleksej Makarov
IPC分类号： H04B17/00 , H04B1/18 , H04B1/00 , H03D3/22 , H04L27/22
CPC分类号： H04L27/2332 , H04L27/2275 , H04L2027/0065 , H04L2027/0087
摘要： Counter-clockwise and clockwise quadrant transitions are detected and accumulated with respect to a received complex signal over a certain time period. These transitions may then be compared in order to obtain information indicative of both a magnitude and phase of a carrier frequency error for the received signal. Additionally, zero-crossings of the received complex signal over the same certain time period are detected and accumulated. The accumulated crossings provide information indicative of frequency offset magnitude. The determined magnitude and phase of the frequency error may then be used to adjust a local oscillator frequency to provide for improved receiver performance.
摘要翻译：在一段时间内相对于接收的复合信号检测并累积逆时针和顺时针象限转换。然后可以比较这些转变，以获得指示接收信号的载波频率误差的幅度和相位的信息。此外，检测并累积在相同的特定时间段内接收到的复信号的零交叉。累积的交叉点提供指示频率偏移幅度的信息。然后可以使用所确定的频率误差的幅度和相位来调整本地振荡器频率以提供改进的接收机性能。

90. 发明授权

US07720180B2 Tracking error detection and correction methods and apparatus 有权
标题翻译：跟踪误差检测和校正方法及装置
公开(公告)号：US07720180B2
公开(公告)日：2010-05-18
申请号：US11375985
申请日：2006-03-15
申请人： Hiromichi Oshikubo , Shoji Kobayashi , Osamu Hosokawa
发明人： Hiromichi Oshikubo , Shoji Kobayashi , Osamu Hosokawa
IPC分类号： H03D3/22
CPC分类号： G11B7/0906
摘要： The objective of this invention is to perform high-precision tracking error detection and tracking control using digital circuitry at relatively low speed and with a small circuit scale. Tracking servo circuit is formed as a single-chip circuit. Low-pass filters (LPF) and gain control amplifiers (GCA) of the input portion are analog circuits, while the circuits after analog-digital (A/D) converters, that is, offset cancellation circuits, equalizers (EQ), first and second phase difference detectors, adder, low-pass filter (LPF), gain control amplifier (GCA), and servo DSP are all digital circuits.
摘要翻译：本发明的目的是使用数字电路以相对低的速度和小的电路规模执行高精度跟踪误差检测和跟踪控制。跟踪伺服电路形成为单片电路。输入部分的低通滤波器（LPF）和增益控制放大器（GCA）是模拟电路，而模拟数字（A / D）转换器之后的电路，即偏移消除电路，均衡器（EQ），第一和第二相位差检测器，加法器，低通滤波器（LPF），增益控制放大器（GCA）和伺服DSP都是数字电路。

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