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1.发明授权Arrangement for measuring and cancelling bias distortion in binary signals of the type not comprising any zero-frequency spectral components 失效用于测量和消除不包括任何零频谱分量的二进制信号中的偏置失真的装置
公开(公告)号：US4980647A
公开(公告)日：1990-12-25
申请号：US334850
申请日：1989-04-06
申请人： Gerard Pouzoullic
发明人： Gerard Pouzoullic
CPC分类号： H04L1/248
摘要： An arrangement for measuring and cancelling bias distortion is designed for correcting the distortion of the binary signals which do not comprise any zero-frequency spectral components, automatically and cyclically measures said distoration (DM) by consecutive analyses of the binary data at a sampling frequency (SCK) which is a multiple of the data frequency in order to determine the sign and the quantized value of the distortion (UDC). It includes distortion cancelling means (CC) which augment the length of the binary elements selectively as a function of the sign of the distortion and proportionally to the quantized value of the said distortion and this is done until the distortion is cancelled completely.
摘要翻译： 用于测量和消除偏置失真的装置被设计用于校正不包括任何零频谱分量的二进制信号的失真，并且以采样频率（二进制数据）的二进制数据的连续分析来循环地测量所述发散（DM） SCK），其是数据频率的倍数，以便确定失真的符号和量化值（UDC）。 它包括失真消除装置（CC），其根据失真的符号有选择地增加二进制元件的长度，并且与所述失真的量化值成比例地增加二进制元件的长度，直到完全消除失真。
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公开(公告)号：US4885737A
公开(公告)日：1989-12-05
申请号：US176961
申请日：1988-04-04
申请人： Loic B. Y. Guidoux
发明人： Loic B. Y. Guidoux
CPC分类号： H04B3/23
摘要： Echo canceler associated with a modem utilizing amplitude and phase modulation of a carrier, the echo canceler comprising adaptive filters (16-1) to (16-p) producing signals which are combined in an adder (15) for forming a synthetic echo signal .epsilon.(n). The coefficients of these filters are adjusted to minimize the mean square value of the residual echo signal e(n)=.epsilon.(n)-.epsilon.(n), where .epsilon.(n) is the echo received. The echo canceler comprises a code conversion circuit (17) which receives a signal D(n) characterizing in each modulation interval the amplitude and phase state of the carrier to be transmitted and which produces distinct configurations of several numbers of values +1, -1 or 0, said distinct configurations corresponding to the distinct possible states of the carrier to be transmitted such that elementary signals D.sub.1 (n) to D.sub.p (n) are formed which are mutually independent in the mean and which are applied to the filters (16-1) to (16-p). These filters can then be realized in a simple way.
摘要翻译： 与调制解调器相关联的回波消除器利用载波的幅度和相位调制，回波消除器包括自适应滤波器（16-1）至（16-p）产生信号，该信号组合在加法器（15）中，用于形成合成回波信号ε （n）。 调整这些滤波器的系数以使残差回波信号e（n）=ε（n）-ε（n）的均方值最小化，其中ε（n）是接收的回波。 回波消除器包括代码转换电路（17），其接收在每个调制间隔中表征要发送的载波的幅度和相位状态的信号D（n），并产生若干数值+1，-1的不同配置 或0，所述不同的配置对应于要发送的载波的不同可能状态，使得形成基本信号D1（n）至Dp（n），其在均值中相互独立，并且被施加到滤波器（16- 1）〜（16-p）。 这些过滤器可以以简单的方式实现。
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公开(公告)号：US4852166A
公开(公告)日：1989-07-25
申请号：US115477
申请日：1987-10-30
申请人： Jacques L. R. Masson
发明人： Jacques L. R. Masson
CPC分类号： H04K1/04
摘要： An analogue scrambling system with dynamic band permutation in which the speech signal is filtered (1), sampled (2) at the rate f.sub.e, digitized (3), transformed by means of an analysis filter bank (4) into N sub-band signals sampled at f.sub.e /N and transferred in a permuted order to a synthesis filter bank (13) accomplishing the calculations of the scrambled signal sampled at the rate f.sub.e. A set of permutations is protected in a memory (8) and a scrambling with dynamic permutation in time is obtained by changing the read addresses of the memory. The scrambled signal reconverted into an analogue signal (14, 15) is transmitted through an analogue channel to an unscrambler where it is preprocessed so that the synchronizing and equalizing functions are accomplished and where the accomplished processes are identical with those accomplished in the scrambler, the difference being that the permuted order of the N sub-band signals is restored.
摘要翻译： 具有动态频带置换的模拟加扰系统，其中语音信号被滤波（1），以数字化（3）的速率fe采样（2），通过分析滤波器组（4）变换成N个子带信号 以fe / N进行采样，并以置换顺序传送到合成滤波器组（13），该合成滤波器组实现以速率fe采样的加扰信号的计算。 一组置换在存储器（8）中被保护，并且通过改变存储器的读取地址来获得时间上的动态置换的加扰。 重新转换为模拟信号（14,15）的加扰信号通过模拟信道传输到解扰器，在那里进行预处理，以便完成同步和均衡功能，并且完成的过程与在扰频器中完成的过程相同， 不同之处在于恢复N个子带信号的置换顺序。
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公开(公告)号：US4679230A
公开(公告)日：1987-07-07
申请号：US731640
申请日：1985-05-07
申请人： Jean Lassaux , Christian Dagorn
发明人： Jean Lassaux , Christian Dagorn
摘要： This arrangement is intended to control the operation of the coefficients adjusting circuit (12) of an echo canceller and of the operation of a center clipper (15) inserted in the send path (7) of a four-wire circuit at the output of the subtractor (13) of the echo canceller for suppressing there, when it is set to its active state, the signals whose amplitude is lower than or equal to a clipping threshold. The control arrangement operates on the basis of the signal in the receive path (2) of the four-wire circuit, the level N.sub.REC of this signal and the levels N.sub.AV and N.sub.AP of the signals before and after the subtractor (13). It comprises a controller (21) for comparing the level N.sub.AV to two fixed thresholds N.sub.AV0, N.sub.AV1 and for comparing the ratio N.sub.AP /N.sub.AV to a threshold a which is capable of varying as a function of N.sub.AV, the center clipper being only set to its active state when the level N.sub.AV is comprised between N.sub.AV0 and N.sub.AV1 and the ratio N.sub.AP /N.sub.AV is below a threshold a, the clipping threshold varying in accordance with an increasing function of the level N.sub.AV.
摘要翻译： 这种布置旨在控制回波消除器的系数调整电路（12）的操作和插入在四线电路的发送路径（7）中的中心限幅器（15）的操作， 减法器（13）用于在其被设置为其活动状态时抑制其振幅低于或等于限幅阈值的信号。 控制装置基于四线电路的接收路径（2）中的信号，该信号的电平NREC和减法器（13）之前和之后的信号的电平NAV和NAP进行操作。 它包括用于将电平NAV与两个固定阈值NAV0，NAV1进行比较的控制器（21），并且用于将NAAP / NAV比值与能够作为NAV的函数变化的阈值a进行比较，中心限幅器仅被设置为 当NAV和NAV1之间的电平NAV包含在NAP / NAV比值低于阈值a时，限幅阈值根据电平NAV的增加函数而变化。
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公开(公告)号：US4584576A
公开(公告)日：1986-04-22
申请号：US545793
申请日：1983-10-26
申请人： Alain Forestier , Philippe Fenaux
发明人： Alain Forestier , Philippe Fenaux
CPC分类号： H04M19/02
摘要： D.C.-fed ringing signal generator for a group of subscriber lines comprises a cascade arrangement of a digital signal generator controllable by a control signal to produce a signal corresponding either to the ringing signal or to a signal having zero value,a digital-to-analog converter,a capacitively-coupled class-A amplifier, anda direct-coupled class-B symmetrical power amplifier to produce the output signal of the ringing signal generator.
摘要翻译： 用于一组用户线路的DC馈电振铃信号发生器包括由控制信号控制的数字信号发生器的级联布置，以产生对应于振铃信号或与零值的信号相对应的信号，数模转换器 转换器，电容耦合的A类放大器和直接耦合的B类对称功率放大器，以产生振铃信号发生器的输出信号。
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6.发明授权Method and apparatus for measuring distant echo delay in an echo cancelling arrangement 失效用于测量回波消除装置中的远程回波延迟的方法和装置
公开(公告)号：US4577309A
公开(公告)日：1986-03-18
申请号：US562612
申请日：1983-12-19
摘要： Method and apparatus for measuring the delay of the distant echo in an echoancelling arrangement comprising a near echo canceller, a delay line and a distant echo canceller using the steps oftransmitting, by modulation of a carrier, a data sequence having a periodic autocorrelation function with sidelobes of negative or zero value, this sequence having a duration at least equal to the maximum value of the delay to be measured and a number of elements determined by the accuracy desired for measurement of the delay;calculating the correlation function between the data of a next transmitted sequence and the data formed by demodulating the received signal and storing calculated samples of the correlation function in a memory; and determining, among the samples stored, the sample corresponding to the maximum of the correlation function and the rank of that sample.
摘要翻译： 一种用于测量包括近回波消除器，延迟线和远距回波消除器的回波消除装置中的远距离回波的延迟的方法和装置，其使用以下步骤：通过调制载波来发送具有周期性自相关函数的数据序列 具有负值或零值的旁瓣，该序列具有至少等于待测量延迟的最大值的持续时间和由测量延迟所需的准确度确定的元素数量; 计算下一发送序列的数据与通过解调接收信号形成的数据之间的相关函数，并将相关函数的计算样本存储在存储器中; 并且在存储的样本中确定与相关函数的最大值和该样本的秩相对应的样本。
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7.发明授权
公开(公告)号：US4454384A
公开(公告)日：1984-06-12
申请号：US376888
申请日：1982-05-10
CPC分类号： H04M9/08
摘要： "Hands free" telephone sets in which there is connected in parallel with the terminals (A) and (B) of a first path (C.sub.1) comprising the coupling circuit of the telephone set in series with a controllable amplifier (11) of the receiving path (6), a second path (C.sub.2) comprising a controllable amplifier (12) which is controlled by a linear regulator (13) which keeps its output signal constant. The gains of the two amplifiers (11) and (12) respond to each other. A device is provided so as to ensure that the gain in the second path remains higher than the gain in the first path. A third controllable amplifier (5) is provided between the microphone (4) and the input terminal (A) which is used in common by the first and second paths; the said means (14) are adjusted in such a way that the electro-acoustic loop which is closed by the second path (C.sub.2) is permanently the source of non-annoying oscillations. By inducing a gain variation of the second amplifier (6) a gain variation in the opposite sense is produced in the receiving path, it being possible for these two variations to have accurately the same amplitudes.
摘要翻译： “免提”电话机与第一路径（C1）的端子（A）和（B）并联连接，第一路径（C1）包括电话机的耦合电路与接收机的可控放大器（11）串联 路径（6），包括由可保持其输出信号恒定的线性调节器（13）控制的可控放大器（12）的第二路径（C2）。 两个放大器（11）和（12）的增益相互响应。 提供了一种装置，以确保第二路径中的增益保持高于第一路径中的增益。 第三可控放大器（5）设置在麦克风（4）和输入端（A）之间，其通过第一和第二路径共同使用; 所述装置（14）被调节成使得由第二路径（C2）闭合的电声回路永久地是非烦人的振荡源。 通过诱导第二放大器（6）的增益变化，在接收路径中产生相反意义上的增益变化，这两个变化可能具有准确相同的幅度。
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公开(公告)号：US4107679A
公开(公告)日：1978-08-15
申请号：US777110
申请日：1977-03-14
申请人： Raymond Strauch , Michel Riffiod
发明人： Raymond Strauch , Michel Riffiod
CPC分类号： H03C3/09 , G01S13/341 , G01S13/882
摘要： A range measuring apparatus of the linear frequency modulation type is disclosed which comprises a measuring control loop for rendering the beat frequency between the transmitted and received frequencies equal to a fixed frequency. The apparatus further includes means for forming a permanent second beat signal between two signals derived from the generator supplying the frequency modulated signal, one of these signals being delayed by means of the delay line. A phase detector receives this second pulsed signal and the signal of a controlled frequency oscillator and supplies a signal which controls the slope of the frequency modulation. The error signal of the measuring control loop controls the frequency of the signal from the oscillator. This arrangement results in an increased precision in the range measurements.
摘要翻译： 公开了一种线性频率调制方式的量程测量装置，其包括用于使发送频率和接收频率之间的频率等于固定频率的测量控制回路。 该装置还包括用于在从提供频率调制信号的发生器导出的两个信号之间形成永久的第二差拍信号的装置，这些信号中的一个借助延迟线被延迟。 相位检测器接收该第二脉冲信号和受控频率振荡器的信号，并提供控制频率调制斜率的信号。 测量控制回路的误差信号控制来自振荡器的信号的频率。 这种布置导致距离测量的精度提高。
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公开(公告)号：US3978485A
公开(公告)日：1976-08-31
申请号：US458787
申请日：1965-05-25
申请人： Pierre Bonnaval
发明人： Pierre Bonnaval
CPC分类号： H01Q13/22
摘要： The subject matter of this application concerns directional slot antenna suitable for very high frequencies. The antenna is made up from a wave guide closed at one end on a terminal absorption load. One face of the wave guide is characterized by an elongated slot of consistent width which is formed in relation to the remainder of the wave guide according to a prescribed mathematical relationship.
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公开(公告)号：US5088110A
公开(公告)日：1992-02-11
申请号：US325085
申请日：1989-03-15
CPC分类号： H04L27/01
摘要： A baseband-controlled passband equalizing arrangement comprises a passband correction circuit for the data signals transmitted by modulating a carrier frequency, a first demodulation circuit which cooperates with a carrier recovery circuit for converting these carrier-modulated data signals into baseband signals, and a control circuit acting on the variable elements provided in the passband correction circuit in response to an estimated error of the baseband signals. The passband correction circuit produces a passband output signal v(t), which is a continuous function of the time t, in response to a passband input signal x(t), which is a continuous function of the time t, in accordance with the relation: ##EQU1## where r.sub.m, .psi..sub.m, .rho..sub.j, .phi..sub.j are variable elements, and .tau..sub.j, .tau..sub.m are fixed delays and M, N are constants.
摘要翻译： 基带控制的通带均衡装置包括用于通过调制载波频率发送的数据信号的通带校正电路，与用于将这些载波调制数据信号转换为基带信号的载波恢复电路协作的第一解调电路，以及控制电路 响应于基带信号的估计误差，作用于提供在通带校正电路中的可变元件。 通带校正电路响应于作为时间t的连续函数的通带输入信号x（t），根据该通带校正电路产生作为时间t的连续函数的通带输出信号v（t） 关系：
其中rm，psi m，rho j，phi j是可变元素，τj，τm是固定延迟，M，N是常数。
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