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1. 发明授权

US06347127B1 Method and apparatus for multi-symbol matched filter estimation of an evaluation symbol in a received signal having a predictable inter-symbol interference 有权
标题翻译：具有可预测的符号间干扰的接收信号中的评估符号的多符号匹配滤波器估计的方法和装置
公开(公告)号：US06347127B1
公开(公告)日：2002-02-12
申请号：US09309124
申请日：1999-05-10
申请人： Weizhong Chen
发明人： Weizhong Chen
IPC分类号： H03D106
CPC分类号： H04L25/063
摘要： A processing system (216) selects (1004) a portion (702-706) of a received signal including an evaluation symbol (702), along with a preceding symbol (704) received immediately before the evaluation symbol, and a following symbol (706) received immediately after the evaluation symbol; and prefixes (1006) to the portion of the received signal a previously estimated symbol (708) received immediately before the portion, thereby producing an evaluation portion (712, 904). The processing system then compares (1008) the evaluation portion with templates equal in length to the evaluation portion and including different combinations of trial symbols and the at least one previously estimated symbol, prefixed to the trial symbols; and estimates (1010) the evaluation symbol to be equal to a trial symbol in one of the templates having a highest correlation with the evaluation portion, the trial symbol having a position matching that of the evaluation symbol in the evaluation portion.
摘要翻译：处理系统（216）选择（1004）包括评估符号（702）的接收信号的一部分（702-706）以及紧接在评估符号之前接收的先前符号（704）和随后的符号（706 ）在评估符号后立即收到; 以及在所述接收信号的所述部分前面（1006）将先前估计的符号（708）紧接在所述部分之前，由此产生评估部分（712,904）。处理系统然后将评估部分与长度相等的模板与评估部分进行比较（1008），并且包括尝试符号和试用符号前缀的至少一个先前估计的符号的不同组合; 并且将所述评估符号估计（1010）为与所述评估部分具有最高相关性的模板之一中的试验符号，所述试验符号具有与所述评估部分中的所述评估符号的位置相匹配的位置。

2. 发明授权

US06292520B1 Noise Canceler utilizing orthogonal transform 有权
标题翻译：噪声消除器利用正交变换
公开(公告)号：US06292520B1
公开(公告)日：2001-09-18
申请号：US09354428
申请日：1999-07-16
申请人： Yuriko Tsukahara
发明人： Yuriko Tsukahara
IPC分类号： H03D106
CPC分类号： H04B1/1036
摘要： A noise canceler according to the invention orthogonally transforms a noise frame by means of an FFT and sorts its transform coefficients into N groups by means of a group by group basic reduction value determining section. Then, it compares the mean value of the transform coefficients of each of the groups with a threshold value and determines a basic reduction value according to the outcome of the comparison. Then, it operates to suppress the transform coefficients produced from the FFT by-means of a transform coefficient suppressing section on the basis of the basic reduction value.
摘要翻译：根据本发明的噪声消除器通过FFT对噪声帧进行正交变换，并且通过逐个组基本减少值确定部分将其变换系数分类成N组。然后，将各组的变换系数的平均值与阈值进行比较，并根据比较结果确定基本的减少值。然后，通过变换系数抑制部根据基本减法值来抑制由FFT产生的变换系数。

3. 发明授权

US06272191B1 Information receiving system and an information receiving method using such a system 失效
标题翻译：信息接收系统和使用这种系统的信息接收方法
公开(公告)号：US06272191B1
公开(公告)日：2001-08-07
申请号：US09418194
申请日：1999-10-13
申请人： Nobuya Inamori
发明人： Nobuya Inamori
IPC分类号： H03D106
CPC分类号： H03J1/0083
摘要： A system is provided to prevent the generation of radio waves of local oscillation from an FM multiplex receiver 11 within a frequency band which adversely affects an FM radio 12 without providing an isolation buffer. The FM multiplex receiver 11 and the FM radio 12 are connected via a main controller 13. The main controller 13 discriminates whether or not the FM radio 12 is on. In the case that the FM radio 12 is on, the main controller 13 controls the tuning of the FM multiplex receiver 11 lest the tuning frequency of the FM multiplex receiver 11 should be set to a specified prohibited frequency.
摘要翻译：提供一种系统，用于防止在不提供隔离缓冲器的情况下对FM收音机12造成不利影响的频带内的FM多路复用接收机11产生本地振荡的无线电波。 FM多路复用接收机11和FM收音机12通过主控制器13连接。主控制器13判断FM收音机12是否接通。在FM收音机12接通的情况下，主控制器13控制FM多路复用接收机11的调谐，以免将FM多路复用接收机11的调谐频率设定为规定的禁止频率。

4. 发明授权

US06658071B1 Delayed decision feedback log-map equalizer 有权
标题翻译：延迟决策反馈日志映射均衡器
公开(公告)号：US06658071B1
公开(公告)日：2003-12-02
申请号：US09503788
申请日：2000-02-14
申请人： Jung-Fu Cheng
发明人： Jung-Fu Cheng
IPC分类号： H03D106
CPC分类号： H04L27/22 , H04L25/03171 , H04L25/03235 , H04L25/03318
摘要： A delayed decision feedback Log-MAP equalizer generates optimal soft information at the bit level for MPSK and MDPSK modulations over multipath fading channels. The algorithms have a forward-backward recursion structure similar to conventional Log-MAP algorithms. To reduce complexity, the forward recursion incorporates the techniques of delayed decision feedback sequence estimation to construct a reduced state space. The backward recursion then takes this state space as given, in that it does not hypothesize feedbacks, and computes required soft information.
摘要翻译：延迟决策反馈Log-MAP均衡器在比特级产生针对多径衰落信道的MPSK和MDPSK调制的最佳软信息。这些算法具有类似于常规Log-MAP算法的前向递归结构。为了降低复杂度，正向递归结合了延迟判决反馈序列估计技术，构建了一个简化的状态空间。反向递归然后将该状态空间作为给定，因为它不假设反馈，并且计算所需的软信息。

5. 发明授权

US06597751B1 Method of displaying signals in the presence of inter symbol interference 失效
标题翻译：在存在码间干扰的情况下显示信号的方法
公开(公告)号：US06597751B1
公开(公告)日：2003-07-22
申请号：US09510490
申请日：2000-02-23
申请人： Robert T. Cutler
发明人： Robert T. Cutler
IPC分类号： H03D106
CPC分类号： H04L25/03006
摘要： Display of signals containing inter-symbol interference (ISI). An input signal is modeled as comprising an ideal signal plus ISI plus error. In a first embodiment of the invention, an error signal and an ideal signal are derived from the input signal. The ideal signal is combined with the error signal producing an ideal signal with errors. In a second embodiment of the invention, a first signal comprising the ideal signal plus ISI plus error is derived. A second signal comprising only ISI is derived, and subtracted from the first signal, producing a signal containing the ideal signal plus error.
摘要翻译：显示包含符号间干扰（ISI）的信号。输入信号被建模为包括理想信号加ISI加错误。在本发明的第一实施例中，从输入信号导出误差信号和理想信号。理想信号与误差信号组合，产生具有误差的理想信号。在本发明的第二实施例中，导出包括理想信号加ISI加错误的第一信号。导出仅包括ISI的第二信号，并从第一信号中减去产生包含理想信号加错误的信号。

6. 发明授权

US06532272B1 RAM-search processor for intersymbol interference cancellation 有权
标题翻译： RAM搜索处理器进行符号间干扰消除
公开(公告)号：US06532272B1
公开(公告)日：2003-03-11
申请号：US09373919
申请日：1999-08-12
申请人： William E. Ryan , Ali Ghrayeb
发明人： William E. Ryan , Ali Ghrayeb
IPC分类号： H03D106
CPC分类号： G11B20/10287 , G11B20/10009 , G11B20/10055 , H04L25/03146 , H04L25/497 , H04L2025/0349 , H04L2025/03605
摘要： A method of canceling intersymbol interference (ISI) for a signal bit ak at time k, where k&egr;{0, ±1, ±2, . . . } in data transmission and data storage channels, by modelling the channel; training a RAM with known values for ak to acquire the model of the channel; searching for the optimal address for the RAM, with past, present, and future values of ak, to be used in minimizing the ISI in the received signal; and canceling ISI from the received signal. A RAM-search method and apparatus is presented which operates in cooperation with Viterbi detection and decoding, as well as with BCJR-APP detection and decoding.
摘要翻译：一种在时间k消除信号位ak的符号间干扰（ISI）的方法，其中kepsi {0,1,2，...，。。 }在数据传输和数据存储通道中，通过对通道建模; 训练具有ak的已知值的RAM以获取频道的模型; 搜索具有过去，现在和将来的ak的RAM的最佳地址，以用于最小化接收信号中的ISI; 并从接收到的信号中取消ISI。提出了一种与维特比检测和解码协同工作的RAM搜索方法和装置，以及BCJR-APP检测和解码

7. 发明授权

US06473596B1 Close proximity transmitter interference limiting 有权
标题翻译：近距离发射机干扰限制
公开(公告)号：US06473596B1
公开(公告)日：2002-10-29
申请号：US09467850
申请日：1999-12-20
申请人： Keith A. Stamper , Mark C. Calcatera
发明人： Keith A. Stamper , Mark C. Calcatera
IPC分类号： H03D106
CPC分类号： H04B1/525 , H04B1/123
摘要： A weaker signal receiving system inclusive of stronger nearby-sourced interference signal cancellation capability. Stronger interference signal cancellation is accomplished by actively canceling or subtracting from the received signal an intermediate signal in which the weaker signal has been attenuated but the stronger signal remains. Attenuation of the weaker signal in this intermediate signal is accomplished in a feedback loop arrangement by an amplitude-responsive signal processing element embodied from for example a ferrite material such as yttrium iron garnet disposed in a physical wave propagating and wave amplitude sensitive film. The cancellation or subtracting is accomplished using received signals and without need for a direct output sample of the stronger signal at its source. Military aircraft use of the disclosed system in the microwave and other spectral regions with transmission mode as opposed to reflection mode signal amplitude discrimination by the ferrite device is included.
摘要翻译：较弱的信号接收系统，包括更强的邻近干扰信号消除能力。更强的干扰信号消除是通过主动地从接收信号中消除或减去较弱信号已被衰减但较强信号保持的中间信号来实现的。该中间信号中较弱信号的衰减通过由例如铁氧体材料（例如设置在物理波传播和波振幅敏感膜中的钇铁石榴石）体现的振幅响应信号处理元件的反馈环路布置来实现。消除或减去是使用接收到的信号完成的，而不需要在其源处具有较强信号的直接输出样本。军用飞机使用所公开的系统在具有传输模式的微波和其他频谱区域中，与反射模式信号相比，由铁氧体装置进行幅度鉴别。

8. 发明授权

US06377638B1 SIGNAL TRANSMISSION SYSTEM FOR TRANSMITTING SIGNALS BETWEEN LSI CHIPS, RECEIVER CIRCUIT FOR USE IN THE SIGNAL TRANSMISSION SYSTEM, AND SEMICONDUCTOR MEMORY DEVICE APPLYING THE SIGNAL TRANSMISSION SYSTEM 有权
标题翻译：用于在信号传输系统中使用的LSI芯片，接收器电路之间发送信号的信号传输系统和应用信号传输系统的半导体存储器件
公开(公告)号：US06377638B1
公开(公告)日：2002-04-23
申请号：US09688389
申请日：2000-10-12
申请人： Hirotaka Tamura , Miyoshi Saito , Kohtaroh Gotoh , Shigetoshi Wakayama , Junji Ogawa , Hisakatsu Araki , Tsz-shing Cheung
发明人： Hirotaka Tamura , Miyoshi Saito , Kohtaroh Gotoh , Shigetoshi Wakayama , Junji Ogawa , Hisakatsu Araki , Tsz-shing Cheung
IPC分类号： H03D106
CPC分类号： H04L25/0276 , G06F13/4243 , H04L25/0278 , H04L25/0282 , H04L25/0288 , H04L25/497 , Y02D10/14 , Y02D10/151
摘要： A signal transmission system has a response time of a signal transmission line which is set approximately equal to or longer than the length of a transmitted symbol. More specifically, terminal resistance is set larger than the characteristic impedance of the signal transmission line, driver output resistance is set to a large value, or a damping resistor is provided in series with the signal transmission line. With this configuration, signal power can be reduced drastically.
摘要翻译：信号传输系统具有被设置为大致等于或长于发送符号的长度的信号传输线的响应时间。更具体地，将端子电阻设定为大于信号传输线的特性阻抗，驱动器输出电阻设定为大值，或者与信号传输线串联设置阻尼电阻。通过这种配置，可以显着降低信号功率。

9. 发明授权

US06324231B1 DC offset cancellation apparatus and method for digital demodulatation 有权
标题翻译： DC偏移消除装置及数字解调方法
公开(公告)号：US06324231B1
公开(公告)日：2001-11-27
申请号：US09195243
申请日：1998-11-18
申请人： Ke-Chiang Huang
发明人： Ke-Chiang Huang
IPC分类号： H03D106
CPC分类号： H03D3/008 , H04L25/064
摘要： A DC offset cancellation circuit comprises a subtracter, a noise shaper, an accumulator and an attenuator. The subtracter is used to subtract a quantized DC offset from a digital signal. The noise shaper converts an unquantized DC offset into the quantized DC offset, the quantized DC offset having fewer bits than the unquantized DC offset and an average value in the time domain that is approximately equal to the unquantized DC offset. The accumulator generates an accumulation value by means of summing the outputs of the subtracter. The attenuator is employed to multiply the accumulation value by a constant, which is less than one, and transmit the resulting initial DC offset to the subtracter.
摘要翻译： DC偏移消除电路包括减法器，噪声整形器，累加器和衰减器。减法器用于从数字信号中减去量化的DC偏移。噪声整形器将未量化的DC偏移转换为量化DC偏移，量化的DC偏移具有比未量化的DC偏移更少的位和在时域中的近似等于非量化DC偏移的平均值。累加器通过对减法器的输出求和来产生累加值。使用衰减器将累积值乘以小于1的常数，并将所得到的初始DC偏移发送到减法器。

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