公开(公告)号：US20140348217A1

公开(公告)日：2014-11-27

申请号：US14280683

申请日：2014-05-19

申请人： MEDIATEK INC.

发明人： Ming-Yu Hsieh ,  Chi-Hsueh Wang ,  Pou-Chi Chang

IPC分类号： H04L27/34

CPC分类号： H03K19/017509 ,  G01R21/06 ,  G01R23/00 ,  H03F1/02 ,  H03F1/24 ,  H03F3/2178 ,  H03F3/24 ,  H03F2203/21154 ,  H03K19/017581 ,  H03M1/12 ,  H04B1/04 ,  H04B1/0475 ,  H04B2001/0408 ,  H04B2001/045 ,  H04L7/0037 ,  H04L7/0091 ,  H04L25/028 ,  H04L25/08 ,  H04L27/2053 ,  H04L27/2067 ,  H04L27/3411 ,  H04L27/3444 ,  H04W24/02

摘要： A transmitter system includes a digital phase rotator, a phase rotation controller, and a digital radio-frequency (RF) transmitter. The digital phase rotator receives a first constellation data, and applies a digital phase rotation to the received first constellation data to generate a second constellation data. The phase rotation controller configures the digital phase rotation. The digital RF transmitter receives a digital input data derived from the second constellation data, and converts the digital input data into an analog RF output.

摘要翻译： 发射机系统包括数字相位旋转器，相位旋转控制器和数字射频（RF）发射器。 数字相位旋转器接收第一星座数据，并且对所接收的第一星座数据应用数字相位旋转以产生第二星座数据。 相位旋转控制器配置数字相位旋转。 数字RF发射器接收从第二星座数据得到的数字输入数据，并将数字输入数据转换为模拟RF输出。

公开(公告)号：US08867659B2

公开(公告)日：2014-10-21

申请号：US12824392

申请日：2010-06-28

申请人： Detlev Liebl

发明人： Detlev Liebl

IPC分类号： H04L25/03 ,  H04L27/18 ,  H04L27/20 ,  H04L27/34

CPC分类号： H04L27/2067 ,  H04L27/183 ,  H04L27/3405

摘要： A communications device includes a transmitter, a transmission processing device, a receiver, and a reception processing device. The transmission processing device assigns signal-space points within an I/Q signal space to digital signals, which include data values. The reception processing device assigns data values to signal-space points. The transmitter generates a transmission signal from signal-space points to be transmitted. The receiver determines received signal-space points from a received signal. The individual transmitted and received signal-space points provide in each case a smaller spacing distance from adjacent signal-space points than from the origin of the signal space.

摘要翻译： 通信设备包括发射机，发射处理设备，接收机和接收处理设备。 发送处理装置将I / Q信号空间内的信号空间点分配给包括数据值的数字信号。 接收处理装置将数据值分配给信号空间点。 发射机从要传输的信号空间点生成传输信号。 接收机从接收到的信号确定接收的信号空间点。 各个发送和接收的信号空间点在每种情况下提供与相邻信号空间点的间隔距离远小于信号空间的原点。

公开(公告)号：US07805123B2

公开(公告)日：2010-09-28

申请号：US11737802

申请日：2007-04-20

申请人： Yoshikazu Sugiyama ,  Isao Ikuta ,  Yusaku Katsube

发明人： Yoshikazu Sugiyama ,  Isao Ikuta ,  Yusaku Katsube

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04L27/2067 ,  H03C1/52 ,  H03C3/00 ,  H04B1/7136 ,  H04B1/71635

摘要： A technique of frequency hopping communication capable of high-speed switching of a plurality of signals having ultra-wide band 528 MHz bandwidth at high-speed and setting and switching a band center frequency and the number of bands arbitrary is provided. A radio transceiver has a frequency hopping communication function of UWB system for switching the ultra wide band signal. In the device, high-speed frequency hopping is realized by controlling an SSB mixer in a local oscillator circuit and switching the frequency of a DDS. The device sets NCO data to the DDS and switches a quadrature phase signal of an output, and switches a signal input of an input terminal of the SSB mixer by a control of a phase switching switch. One of a sum component and a difference component of a mixture of first and second quadrature phase signals is outputted from the output terminal of the SSB mixer.

摘要翻译： 提供一种跳频通信技术，其能够高速切换具有超宽带528MHz带宽的多个信号，并且设置和切换频带中心频率和频带数量的跳频通信。 无线电收发器具有用于切换超宽带信号的UWB系统的跳频通信功能。 在设备中，通过在本地振荡器电路中控制SSB混频器并切换DDS的频率来实现高速跳频。 该装置将NCO数据设置为DDS并切换输出的正交相位信号，并通过相位切换开关的控制切换SSB混频器的输入端的信号输入。 从SSB混频器的输出端子输出第一和第二正交相位信号的混合的和分量和差分分量之一。

公开(公告)号：US07697637B2

公开(公告)日：2010-04-13

申请号：US11450465

申请日：2006-06-12

申请人： Tatsuaki Kitta ,  Takanori Iwamatsu

发明人： Tatsuaki Kitta ,  Takanori Iwamatsu

IPC分类号： H04L27/00

CPC分类号： H04L27/2067 ,  H04L7/0029 ,  H04L7/0054 ,  H04L2027/0032 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0079

摘要： A demodulation circuit can perform a capturing operation although a frequency error is large. A phase comparator out puts a predetermined value other than 0 as a determination result of a phase error when a phase error of a carrier wave is large and a signal point is located at a predetermined position. A loop filter outputs a negative minimum value to an integrator when an integrated value of a determination result reaches a positive maximum value of a limiter. Thus, when a phase error is large, a value changing from a negative minimum value to a positive maximum value is output from the loop filter, thereby realizing a broad synchronous capture range.

摘要翻译： 尽管频率误差较大，但是解调电路可以执行捕获操作。 当载波的相位误差较大并且信号点位于预定位置时，相位比较器输出将除0之外的预定值作为相位误差的确定结果。 当确定结果的积分值达到限制器的正最大值时，环路滤波器向积分器输出负最小值。 因此，当相位误差大时，从环路滤波器输出从负最小值变化到正最大值的值，从而实现宽的同步捕获范围。

公开(公告)号：US07362820B2

公开(公告)日：2008-04-22

申请号：US11131714

申请日：2005-05-18

申请人： Asad U. Aman ,  Thomas J. Kundmann ,  Gregory T. Nash

发明人： Asad U. Aman ,  Thomas J. Kundmann ,  Gregory T. Nash

IPC分类号： H04K1/02

CPC分类号： H04L27/0008 ,  H03F1/3247 ,  H03F1/3282 ,  H03F2200/165 ,  H03F2200/465 ,  H03F2201/3227 ,  H03F2201/3233 ,  H04L27/2017 ,  H04L27/2067 ,  H04L27/368 ,  H04W28/18

摘要： A programmable modulator (100) is programmable to operate in either of a GMSK or 8PSK mode. When operating in a GMSK mode, a signal modulating circuit 105 receives (210) a bit stream (110), maps the bit stream (110) to a phase value in complex I, Q form and applies a progressive rotation to the phase value according to GMSK specifications. The output (140) is filtered by a filter circuit (135), preferably using a complex Finite Impulse Response (FIR) filter using the standard coefficients for an 8PSK modulation to create (215) an approximate GMSK output (165). A GMSK correction circuit (150) determines a correction term that is added to the filter circuit output (165) so as to correct amplitude variations to allow the output to conform to GSM/EDGE standards. The same modulator (100) may be programmed to operate in an 8PSK mode with linear predistortion.

摘要翻译： 可编程调制器（100）可编程以在GMSK或8PSK模式中工作。 当在GMSK模式下操作时，信号调制电路105接收（210）比特流（110），将比特流（110）映射到复数I，Q形式的相位值，并根据 到GMSK规格。 输出（140）由滤波器电路（135）滤波，优选地使用复数有限脉冲响应（FIR）滤波器，使用用于8PSK调制的标准系数来创建（215）近似GMSK输出（165）。 GMSK校正电路（150）确定添加到滤波器电路输出（165）的校正项，以校正幅度变化，以允许输出符合GSM / EDGE标准。 可以将相同的调制器（100）编程为以具有线性预失真的8PSK模式操作。

公开(公告)号：US20070172002A1

公开(公告)日：2007-07-26

申请号：US11450465

申请日：2006-06-12

申请人： Tatsuaki Kitta ,  Takanori Iwamatsu

发明人： Tatsuaki Kitta ,  Takanori Iwamatsu

IPC分类号： H04L27/00 ,  H04L27/22

CPC分类号： H04L27/2067 ,  H04L7/0029 ,  H04L7/0054 ,  H04L2027/0032 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0079

摘要： A demodulation circuit can perform a capturing operation although afrequency error is large. A phase comparator out puts a predetermined value other than 0 as a determination result of a phase error when a phase error of a carrier wave is large and a signal point is located at a predetermined position. A loop filter outputs a negative minimum value to an integrator when an integrated value of a determination result reaches a positive maximum value of a limiter. Thus, when a phase error is large, a value changing from a negative minimum value to a positive maximum value is output from the loop filter, thereby realizing a broad synchronous capture range.

摘要翻译： 虽然频率误差大，但是解调电路可以进行拍摄操作。 当载波的相位误差较大并且信号点位于预定位置时，相位比较器输出将除0之外的预定值作为相位误差的确定结果。 当确定结果的积分值达到限制器的正最大值时，环路滤波器向积分器输出负最小值。 因此，当相位误差大时，从环路滤波器输出从负最小值变化到正最大值的值，从而实现宽的同步捕获范围。

公开(公告)号：US07120198B1

公开(公告)日：2006-10-10

申请号：US09318560

申请日：1999-05-26

申请人： Philip A. Dafesh ,  Tien M. Nguyen

发明人： Philip A. Dafesh ,  Tien M. Nguyen

IPC分类号： H04L5/12 ,  H04L23/02

CPC分类号： H04L27/3461 ,  G01S19/02 ,  H04B1/707 ,  H04L27/2067 ,  H04L27/361

摘要： A coherent adaptive subcarrier modulation system applies subcarrier modulation to quadrature modulated signals with constant envelope modulation suitable for efficient sinewave and squarewave subcarrier modulations. The quadrature subcarrier enables the addition of new signals to the in-phase and quadrature phase signals with spectral isolation in the Global Position System while maintaining a constant envelop amplitude.

摘要翻译： 相干自适应子载波调制系统对具有恒定包络调制的正交调制信号应用子载波调制，适用于有效的正弦波和方波子载波调制。 正交子载波使得能够在保持恒定的包络幅度的同时在全局位置系统中具有光谱隔离的同相和正交相位信号的新信号。

公开(公告)号：US07068735B2

公开(公告)日：2006-06-27

申请号：US10786376

申请日：2004-02-25

申请人： Baoguo Yang ,  Nelson R. Sollenberger

发明人： Baoguo Yang ,  Nelson R. Sollenberger

IPC分类号： H04L25/60 ,  H04L25/10

CPC分类号： H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L5/0048 ,  H04L25/03171 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2017 ,  H04L27/2067 ,  H04L27/22

摘要： A method to perform DC compensation on a Radio Frequency (RF) burst transmitted between a servicing base station and a wireless terminal in a cellular wireless communication system that first receives the RF burst modulated according to either a first or second modulation format. Samples from the RF burst, or taken from the training sequence, are produced and averaged to produce a DC offset estimate. The DC offset estimate is then subtracted from each of the samples. The modulation format of RF burst may then be identified from the samples. Depending on the identified modulation format, the DC offset estimate may be re-added to the samples when a particular modulation format is identified as the modulation format of the RF burst. This decision is made based on how well various components within the wireless terminal perform DC offset compensation.

摘要翻译： 在首先接收根据第一或第二调制格式调制的RF突发的蜂窝无线通信系统中在服务基站和无线终端之间传输的射频（RF）突发上执行DC补偿的方法。 产生来自RF突发或从训练序列获取的样本并对其进行平均以产生DC偏移估计。 然后从每个样本中减去DC偏移估计。 然后可以从样本中识别RF突发的调制格式。 取决于所识别的调制格式，当将特定调制格式识别为RF突发的调制格式时，DC偏移估计可被重新添加到样本。 该决定基于无线终端内的各种组件执行DC偏移补偿的程度。

公开(公告)号：US20040097207A1

公开(公告)日：2004-05-20

申请号：US10433992

申请日：2003-12-12

发明人： Sathiaseelan Sandaralingam

IPC分类号： H04B001/16 ,  H03D001/00 ,  H04L027/06

CPC分类号： H04L27/2067 ,  H04L25/0212 ,  H04L27/0012 ,  H04L27/2017

摘要： This invention relates to a method for determining a modulation method comprising demodulating said method comprising demodulating said received signal using at least two different modulation methods, determining for each demodulated signal an estimate of said channel, said estimate of said channel comprising m taps, selecting n of said taps for each channel estimate, a being less than m, estimating a variance for each demodulated signal based on said n taps, and comparing the estimated variances and based on said comparison making a determination as to the modulation method applied to the received signal.

摘要翻译： 本发明涉及一种用于确定调制方法的方法，包括解调所述方法，包括使用至少两种不同调制方法对所述接收信号进行解调，为每个解调信号确定所述信道的估计，所述信道的估计包括m个抽头，选择n 对于每个信道估计的所述抽头，小于m，基于所述n个抽头估计每个解调信号的方差，并且比较所估计的方差，并且基于所述比较，作出对应用于接收信号的调制方法的确定 。

公开(公告)号：US20040096012A1

公开(公告)日：2004-05-20

申请号：US10706779

申请日：2003-11-12

发明人： Bin Yang

IPC分类号： H04L027/12

CPC分类号： H04L27/2017 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2067

摘要： Data symbols in the training sequence are rotated at the transmitter end through a phase rotation factor which is specific for a given modulation type that is used. For blind modulation detection at the receiver end, the data symbols are derotated through different phase rotation factors, and a correlation function is formed between the sequences obtained in this way and the original training sequence. The type of modulation which is used is obtained from the phase rotation factor which produces a maximum for the correlation function.

摘要翻译： 训练序列中的数据符号在发射机端通过相对于所使用的给定调制类型特有的相位旋转因子旋转。 对于接收端的盲调制检测，通过不同的相位旋转因子对数据符号进行解调，并且在以这种方式获得的序列与原始训练序列之间形成相关函数。 所使用的调制类型是从产生相关函数最大值的相位旋转因子获得的。