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81. 发明授权

US07383027B2 Transmission circuit 有权
标题翻译：传输电路
公开(公告)号：US07383027B2
公开(公告)日：2008-06-03
申请号：US11041360
申请日：2005-01-25
申请人： Toru Matsuura , Hisashi Adachi
发明人： Toru Matsuura , Hisashi Adachi
IPC分类号： H04B1/68
CPC分类号： H04L27/361
摘要： A transmission circuit capable of transmitting a modulated wave signal using polar modulation in a broad band and with low power consumption is provided. The transmission circuit generates an amplitude signal and a phase signal based on data to be transmitted, and separates the amplitude signal into a low-frequency amplitude signal and a high-frequency amplitude signal. The transmission circuit amplitude-modulates the phase signal in a broad band using the high-frequency amplitude signal in a high-frequency voltage control section 104 and an amplitude modulation section 105 and amplitude-modulates the phase signal into low power consumption using the low-frequency amplitude signal in a low-frequency voltage control section 106 and amplitude modulation section 107.
摘要翻译：提供了能够以宽频带和低功耗的极性调制来发送调制波信号的发送电路。发送电路基于要发送的数据生成振幅信号和相位信号，并将振幅信号分离为低频振幅信号和高频振幅信号。传输电路使用高频电压控制部分104和幅度调制部分105中的高频振幅信号对宽带中的相位信号进行幅度调制，并且使用低频电压控制部分104和幅度调制部分105将相位信号幅度调制成低功耗。频率振幅信号在低频电压控制部106和振幅调制部107中。

82. 发明授权

US07099640B2 Method distinguishing line of sight (LOS) from non-line of sight (NLOS) in CDMA mobile communication system 有权
标题翻译：在CDMA移动通信系统中区分视线（LOS）与非视线（NLOS）的方法
公开(公告)号：US07099640B2
公开(公告)日：2006-08-29
申请号：US10500598
申请日：2002-03-29
申请人： Xinxi Diao , Fangfu Guo
发明人： Xinxi Diao , Fangfu Guo
IPC分类号： H04B1/06 , H04B1/68
CPC分类号： H04B1/7113
摘要： The invention discloses a method that identifies whether a channel is LOS or NLOS in a mobile communication system. After coherent accumulation and non-coherent accumulation have been made by the system, first the method takes power difference between the direct path and the non-direct path in a same power delay profile to identify a channel; and then the result is further determined by {overscore (τ)}/σ difference of a LOS channel and a NLOS channel (where {overscore (τ)} and σ is the mean delay and the RMS delay spread of a multipath power profile, respectively). A channel is determined as a LOS channel, if the power ratio of the Maximum Path to the Local Maximum Path is greater than a threshold K, and simultaneously the arrival time difference between the First Path and said Maximum Path is less than a time interval T; otherwise it is a NLOS channel. The method is easier to implement and compatible with the present mobile communication system.
摘要翻译：本发明公开了一种在移动通信系统中识别信道是LOS还是NLOS的方法。在系统进行相干累加和非相干累加之后，首先采用相同的功率延迟分布中的直接路径和非直接路径之间的功率差异来识别信道; 然后结果进一步由{overcore（LOS通道和NLOS通道的tau / sigma差异（其中超过（tau和sigma分别是多径功率曲线的平均延迟和RMS延迟扩展））决定。如果本地最大路径的最大路径的功率比大于阈值K，则同时将第一路径与所述最大路径之间的到达时间差小于时间间隔T; 否则是NLOS通道，该方法更容易实现，与目前的移动通信系统兼容。

83. 发明申请

US20060009170A1 Numerical control of sideband energy and modulation compression method for the radio frequency transmission of high speed data 审中-公开
标题翻译：用于高速数据射频传输的边带能量和调制压缩方法的数值控制
公开(公告)号：US20060009170A1
公开(公告)日：2006-01-12
申请号：US11172574
申请日：2005-06-30
申请人： Joseph Bobier
发明人： Joseph Bobier
IPC分类号： H04B1/68 , H03C3/00 , H03C1/52
CPC分类号： H04L25/4902 , H04B1/68 , H04L27/10
摘要： A bandwidth control of sideband energy and compression method applied to the integer cycle methods of modulation, is now disclosed called X padding. Radio Frequency (RF) sine waves are grouped into frames of N cycles (divide-by ratio) where N is a variable power of 2 (i.e. 2, 4, 8, 16, 32, 64, 128, 256, 512, etc). This system is flexible wherein N can equal any one of these values. In the frame of N cycles, two alternate cycles are changed to the modulating frequencies. The other cycles remain precisely at the carrier frequency. The position of the alternate modulated cycles in a frame of N-cycles determines the exact binary bits that are being transmitted. This means that by sending only one modulation event where N=16, four (4) bits are transferred. For example, in a frame of 16 cycles (i.e. N=16) where the positions of the alternate modulated cycle is 6, then the four binary bits of information transmitted are 0110. X padding is used to set the pulse repetition rate to fit particular Power Spectrum Density (PSD) needs. This is done by inserting X number of un-modulated RF cycles to the beginning and to the end of the N Frame.
摘要翻译：适用于整数周期调制方法的边带能量和压缩方法的带宽控制现在被公开称为X padding。射频（RF）正弦波被分组为N个周期（除以比）的帧，其中N是2的可变功率（即2,4,8,16,32,64,128,256,512等）。该系统是灵活的，其中N可以等于这些值中的任何一个。在N个周期的帧中，两个交替周期被改变为调制频率。其他周期精确地保持在载波频率。在N个周期的帧中的替代调制周期的位置确定正在发送的确切的二进制位。这意味着通过仅发送一个N = 16的调制事件，传送四（4）位。例如，在16个周期（即N = 16）的帧中，替代调制周期的位置为6，则发送的信息的四个二进制位为0110.X填充用于设置脉冲重复率以适合特定功率谱密度（PSD）需求。这通过将X个未调制的RF周期插入到N帧的开始和结束来完成。

84. 发明申请

US20050186920A1 Apparatus for and method of noise suppression and dithering to improve resolution quality in a digital RF processor 审中-公开
标题翻译：噪声抑制和抖动的装置和方法，以提高数字RF处理器中的分辨率质量
公开(公告)号：US20050186920A1
公开(公告)日：2005-08-25
申请号：US11062254
申请日：2005-02-18
申请人： Robert Staszewski , Dirk Leipold , Khurram Muhammad , Sameh Rezeq
发明人： Robert Staszewski , Dirk Leipold , Khurram Muhammad , Sameh Rezeq
IPC分类号： H03C3/00 , H03L7/16 , H04B1/04 , H04B1/06 , H04B1/68
CPC分类号： H03L7/16 , H03L2207/50
摘要： A novel apparatus for and a method of noise and spurious tones suppression in a digital RF processor (DRP). The invention is well suited for use in highly integrated system on a chip (SoC) radio solutions that incorporate a very large amount of digital logic circuitry. The noise suppression scheme eliminates the noise caused by various on chip interference sources transmitted through electromagnetic, power, ground and substrate paths. The noise suppression scheme permits an all digital PLL (ADPLL) to operate in such a way to avoid generating the spurs that would normally be generated from the injection pulling effect of interfering sources on the chip. The frequency reference clock is retimed to be synchronous to the RF oscillator clock and used to drive the entire digital logic circuitry of the DRP. This ensures that the different clock edges throughout the system will not exhibit mutual drift. A method of improving the resolution quality of a time to digital converter within the ADPLL is also taught. The method dithers the reference clock by passing it through a delay circuit that is controlled by a sigma-delta modulator. The dithered reference clock reduces the affect on the phase noise at the output of the ADPLL due to ill-behaved quantization of the TDC timing estimation.
摘要翻译：一种用于数字RF处理器（DRP）中的噪声和伪噪声抑制的新型装置和方法。本发明非常适用于结合了大量数字逻辑电路的高度集成的片上系统（SoC）无线电解决方案。噪声抑制方案消除了通过电磁，电源，接地和基板路径传输的各种片上干扰源引起的噪声。噪声抑制方案允许所有数字PLL（ADPLL）以这样的方式操作，以避免产生通常由芯片上的干扰源的注入拉动效应产生的杂散。频率参考时钟重新定时与RF振荡器时钟同步，用于驱动DRP的整个数字逻辑电路。这确保了整个系统中不同的时钟沿不会出现相互漂移。还提出了一种提高ADPLL内数字转换器的分辨率质量的方法。该方法通过将参考时钟传递通过由Σ-Δ调制器控制的延迟电路来抖动参考时钟。由于TDC定时估计的不正确的量化，抖动参考时钟降低了对ADPLL输出的相位噪声的影响。

85. 发明申请

US20050164660A1 Transmission circuit 有权
标题翻译：传输电路
公开(公告)号：US20050164660A1
公开(公告)日：2005-07-28
申请号：US11041360
申请日：2005-01-25
申请人： Toru Matsuura , Hisashi Adachi
发明人： Toru Matsuura , Hisashi Adachi
IPC分类号： H03C5/00 , H04B1/68 , H04L27/36
CPC分类号： H04L27/361
摘要： A transmission circuit capable of transmitting a modulated wave signal using polar modulation in a broad band and with low power consumption is provided. The transmission circuit generates an amplitude signal and a phase signal based on data to be transmitted, and separates the amplitude signal into a low-frequency amplitude signal and a high-frequency amplitude signal. The transmission circuit amplitude-modulates the phase signal in a broad band using the high-frequency amplitude signal in a high-frequency voltage control section 104 and an amplitude modulation section 105 and amplitude-modulates the phase signal into low power consumption using the low-frequency amplitude signal in a low-frequency voltage control section 106 and amplitude modulation section 107.
摘要翻译：提供了能够以宽频带和低功耗的极性调制来发送调制波信号的发送电路。发送电路基于要发送的数据生成振幅信号和相位信号，并将振幅信号分离为低频振幅信号和高频振幅信号。传输电路使用高频电压控制部分104和幅度调制部分105中的高频振幅信号对宽带中的相位信号进行幅度调制，并且使用低频电压控制部分104和幅度调制部分105将相位信号幅度调制成低功耗。频率振幅信号在低频电压控制部106和振幅调制部107中。

86. 发明授权

US6438164B2 Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component 有权
公开(公告)号：US6438164B2
公开(公告)日：2002-08-20
申请号：US79472401
申请日：2001-02-27
申请人： BROADCOM CORP
发明人： TAN LOKE KUN , LIU TIAN-MIN , HUNG HING ADA T
IPC分类号： H04B1/68 , H04L25/03 , H04L27/00 , H04L27/02 , H04L27/06 , H04L27/227 , H04L27/34 , H04L27/38 , H04N5/21 , H04N5/44 , H04N5/46 , H04N11/00 , H03H7/30
CPC分类号： H04N5/46 , H04B1/68 , H04L25/03057 , H04L27/02 , H04L27/066 , H04L27/2273 , H04L27/3427 , H04L27/3827 , H04L2025/03382 , H04L2025/0342 , H04L2025/0349 , H04L2025/03503 , H04L2027/0032 , H04L2027/0042 , H04L2027/0057 , H04L2027/0067 , H04L2027/0087 , H04N5/21 , H04N5/211 , H04N5/44 , H04N5/4401 , H04N11/002
摘要： A system for reducing the complexity of an adaptive decision feedback equalizer, for use in connection with a dual-mode QAM/VSB receiver system is disclosed. QAM and VSB symbols, which are expressed in two's compliment notation, include an extra bit required to compensate for a fixed offset term introduced by the two's compliment numbering system. A decision feedback equalizer includes a decision feedback filter section which operates on symbolic decisions represented by a wordlength which excludes the added bit representing the offset. The vestigal word is convolved with the decision feedback filter's coefficients, while a DC component, corresponding to the excluded bit, is convolved with the same coefficient values in a correction filter. The two values are summed to provide an ISI compensation signal at the input of a decision device such as a slicer. A DC component representing a pilot tone in VSB transmission systems also introduces a DC component, and additional bits, to a VSB wordlength. These additional bits are similarly excluded and the vestigal representation convolved with coefficient values in a decision feedback filter. The DC component, including the pilot tone representation, is convolved with the same coefficient values in a correction filter.

87. 发明授权

US6002727A Interference signal cancellation system 失效
标题翻译：干扰信号消除系统
公开(公告)号：US6002727A
公开(公告)日：1999-12-14
申请号：US951539
申请日：1997-10-16
申请人： Mitsuru Uesugi
发明人： Mitsuru Uesugi
IPC分类号： H04J13/00 , H03D1/04 , H04B1/10 , H04B1/68 , H04B1/7107 , H04B7/08 , H04W76/02 , H04W88/02
CPC分类号： H04B1/71072 , H04B1/692 , H04B1/7115
摘要： The interference signal cancellation system of the invention has: usual CDMA demodulators respectively disposed for codes, each of the CDMA demodulators having a matched filter 105 and an identifier 107; and a likelihood calculator 108 for each of the demodulators. The apparatus further has: a buffer 103 which stores provisional decision values; another buffer 109 which stores likelihoods; an order determining device 110 which determines an order in accordance with the likelihoods; a respreading device 111 which performs respreading in accordance with the determined order; a delay device 102 which delays a received signal; and a subtractor 112 which subtracts a result of the respreading from the delayed data. For each symbol, the largest likelihood is selected, and a replica is generated by using it. A desired performance is attained by performing one provisional decision and one demodulation. Therefore, computational complexity is reduced and realization is facilitated.
摘要翻译：本发明的干扰信号消除系统具有：分别为代码设置的通常的CDMA解调器，每个CDMA解调器具有匹配滤波器105和标识符107; 以及每个解调器的似然度计算器108。该装置还具有：存储临时判定值的缓冲器103; 存储可能性的另一缓冲器109; 订单确定装置110，其根据似然性确定订单; 根据确定的顺序执行重新发送的再生装置111; 延迟装置102，其延迟接收的信号; 以及从延迟数据中减去重新发现的结果的减法器112。对于每个符号，选择最大的可能性，并通过使用它来生成副本。通过执行一个临时决定和一个解调来获得期望的性能。因此，减少了计算复杂度并促进了实现。

88. 发明授权

US5999300A Hybrid single sideband optical modulator 失效
标题翻译：混合单边带光调制器
公开(公告)号：US5999300A
公开(公告)日：1999-12-07
申请号：US873967
申请日：1997-06-12
申请人： Robert J. Davies , Jan Conradi , David E. Dodds
发明人： Robert J. Davies , Jan Conradi , David E. Dodds
IPC分类号： H04B10/516 , G02F1/035 , H03C5/00 , H04B1/68 , H04L27/04 , H04B10/04
CPC分类号： H04B10/5165
摘要： Bandwidth reduction methods and apparatus that offset the effects of dispersion on a signal transmitted through an optical fiber. The apparatus and methods employ a generator of modulated optical signals in cascade with a modulator. One of the generator and the modulator may be an optical intensity or amplitude modulator and the other a phase (or frequency) modulator. With the application of specific signals, the cascaded generator and modulator produce an optical signal with reduced energy in one half of the transmission bandwidth. One important benefit in the method is the fact that by exploiting the less obvious spectral characteristics of single sideband signals, a simple modulator design is achieved. All of the designs exploit a method of generating analytic signals via hybrid modulation.
摘要翻译：抵消色散对通过光纤传输的信号的影响的带宽减小方法和装置。该装置和方法采用与调制器级联的调制光信号的发生器。发生器和调制器之一可以是光强度或幅度调制器，另一个是相位（或频率）调制器。随着特定信号的应用，级联发生器和调制器在传输带宽的一半内产生具有降低能量的光信号。该方法的一个重要优点是通过利用单边带信号的不太明显的光谱特征，实现了简单的调制器设计。所有这些设计都利用了通过混合调制产生分析信号的方法。

89. 发明授权

US5201071A Method and apparatus for reducing the peak envelope voltage of an RF transmitter while maintaining signal average power 失效
标题翻译：一种在保持信号平均功率的同时降低RF发射器的峰值包络电压的方法和装置
公开(公告)号：US5201071A
公开(公告)日：1993-04-06
申请号：US589305
申请日：1990-09-26
申请人： Kenneth F. Webb
发明人： Kenneth F. Webb
IPC分类号： H04B1/68 , H04L1/02 , H04L5/06
CPC分类号： H04L1/02 , H04B1/68 , H04L5/06
摘要： The average RF power output of an independent sideband diversity radio transmitter, modulated by a multiple tone data signal, is increased while the RF output peak envelope voltage is held constant. For diversity operation the same information, as a combination of the data tones, is applied to both the upper and lower sideband channels of the RF translator. Adding predetermined phase shifts between the upper and lower sideband audio tone pairs results in a reduced peak envelope voltage at the composite RF output. The final RF amplifier gain can then be increased resulting in a higher average RF power output.
摘要翻译：由多音调数据信号调制的独立边带分集无线电发射机的平均RF功率输出增加，同时RF输出峰值包络电压保持恒定。对于分集操作，作为数据音调的组合的相同信息被应用于RF转换器的上边带通道和下边带通道。在上和下边带音频音调对之间增加预定的相移会导致复合RF输出端的降低的峰值包络电压。然后可以增加最终的RF放大器增益，从而获得更高的平均RF功率输出。

90. 发明授权

US5157343A Electronic arrangement for receiving a modulated carrier signal 失效
标题翻译：用于接收调制载波信号的电子装置
公开(公告)号：US5157343A
公开(公告)日：1992-10-20
申请号：US708427
申请日：1991-05-31
申请人： Johannes O. Voorman
发明人： Johannes O. Voorman
IPC分类号： H04B1/16 , H03D1/22 , H04B1/68 , H04B14/06 , H04L27/06 , H04L27/152
CPC分类号： H03D1/2236 , H04B14/062 , H04L27/06 , H04L27/1525
摘要： Electronic receive arrangement for receiving a modulated carrier signal, which arrangement comprises a mixer/demodulator driven with the carrier frequency fc, at least one adder included in a closed signal loop, a low-pass filter, and a pulse shaper constituted by a sigma-delta (one-bit) signal converter and driven with the sampling frequency fs and also comprises a digital decimation filter. The signal loop includes the mixer/demodulator so that the modulated carrier signal is applied to the adder and the output signal of the adder is applied to the mixer/demodulator. The signal loop also comprises a second mixer driven with frequency fc, and the frequencies fs and fc present a common multiple.

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