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1. 发明授权

US5257263A Circuit for decoding convolutional codes for executing the survivor path storage and reverse scanning stage of a Viterbi algorithm 失效
标题翻译：用于解码卷积码的电路，用于执行维特比算法的幸存路径存储和反向扫描阶段
公开(公告)号：US5257263A
公开(公告)日：1993-10-26
申请号：US721008
申请日：1991-06-26
申请人： Andre Bazet , Philippe Sadot
发明人： Andre Bazet , Philippe Sadot
IPC分类号： H03M13/23 , H03M13/41 , G06F11/10
CPC分类号： H03M13/41
摘要： In a circuit for decoding convolutional codes for executing the survivor path storage and reverse scanning stage of a Viterbi algorithm, decoding consists in reverse scanning a plurality of paths of a trellis representing a diagram of the possible transitions resulting from encoding by an encoder comprising .nu. flip-flops, each node of the trellis being represented by a word on N=2.sup..nu. bits. The circuit selects from a plurality of possible survivor paths that which has the lowest metric, so as to reconstitute the trellis path actually determined by the encoding process and to recover the sequence of information bits that caused this path to be adopted. The circuit comprises a memory storing a plurality of said words of N=2.sup..nu. bits and, connected to the output of said memory, a cascade of .nu. groups of 2-in-1 multiplexers progressively combining the 2.sup..nu. outputs of the memory into a single output, a D flip-flop being provided at the output of each multiplexer. The final single flip-flop delivers sequentially the information bits representing the required path and the select signal of each multiplexer is the output signal of said final flip-flop.
摘要翻译：在用于对用于执行维特比算法的幸存路径存储和反向扫描阶段的卷积码进行解码的电路中，解码包括逆向扫描表示由包括nu翻转的编码器的编码产生的可能转换的图的网格的多个路径 -flops，网格的每个节点由N = 2 nu位上的字表示。电路从具有最低度量的多个可能的幸存路径中进行选择，以便重建由编码处理实际确定的网格路径并恢复引起该路径被采用的信息比特序列。该电路包括存储多个所述N = 2 nu比特字的存储器，并且连接到所述存储器的输出端，将存储器的2个nu输出逐渐组合成一个二进制多路复用器的nu组的级联单输出，在每个多路复用器的输出处提供D触发器。最后的单触发器依次递送表示所需路径的信息位，并且每个多路复用器的选择信号是所述最终触发器的输出信号。

2. 发明授权

US5056105A Interleaving method for a digital transmission system 失效
标题翻译：数字传输系统的交互方法
公开(公告)号：US5056105A
公开(公告)日：1991-10-08
申请号：US438380
申请日：1989-11-20
申请人： Marc Darmon , Philippe Sadot , Sami Harari
发明人： Marc Darmon , Philippe Sadot , Sami Harari
IPC分类号： H03M13/27
CPC分类号： H03M13/2785 , H03M13/2746
摘要： A psuedo-random interleaving method suitable for use in transmitting digital data. A pseudo-random pilot sequence is used for simultaneously reading from and writing to a vector of size Tv.gtoreq.Tc.times.Lm, the pilot sequence satisfying a minimum distance law Lm, except when blocking occurs. Deinterleaving is performed symmetrically by means of an inverse pilot sequence suitable for reconstituting successive code words.
摘要翻译：适用于传输数字数据的伪随机交错方法。伪随机导频序列用于同时读取和写入大小为Tv> / = TcxLm的矢量，导频序列满足最小距离定律Lm，除非发生阻塞。通过适用于重构连续码字的逆导频序列对称地执行去交织。

3. 发明授权

US5483545A Method of automatically requesting retransmission in a duplex digital transmission system having at least one noisy return channel, and an installation for implementing the method 失效
标题翻译：在具有至少一个噪声返回信道的双工数字传输系统中自动请求重传的方法，以及用于实现该方法的装置
公开(公告)号：US5483545A
公开(公告)日：1996-01-09
申请号：US946795
申请日：1992-09-18
申请人： Marc Darmon , Marc Pontif , Philippe Sadot
发明人： Marc Darmon , Marc Pontif , Philippe Sadot
IPC分类号： H04L1/18 , H04L1/16
CPC分类号： H04L1/1806 , H04L1/1812
摘要： A go-back-N automatic repeat request method for use on a duplex installation having noisy return channels. When an acknowledge signal (ACK) is not correctly received, it is assumed to be positive until the Nth successive incorrectly received acknowledgement, which is treated as a negative acknowledgement, thereby ensuring that blocks are repeated even if acknowledgements are degraded by jamming.
摘要翻译：一种用于具有噪声返回信道的双工设备的回溯N自动重传请求方法。当确认信号（ACK）未被正确接收时，假设为正，直到第N个连续不正确接收到的确认被视为否定确认，从而确保即使确认由于卡住而导致确认，也将重复该块。

4. 发明授权

US5184097A Agile microwave filter having at least one ferrite resonator 失效
标题翻译：具有至少一个铁氧体共振器的AGILE MICROWAVE过滤器
公开(公告)号：US5184097A
公开(公告)日：1993-02-02
申请号：US655604
申请日：1991-02-15
申请人： Carole Brouzes , Claude Ressencourt , Alain de Place
发明人： Carole Brouzes , Claude Ressencourt , Alain de Place
IPC分类号： H01P1/20 , H01P1/208 , H01P1/215 , H01P7/10
CPC分类号： H01P1/2084 , H01P1/215 , H01P7/10
摘要： An agile microwave filter tunable by ferrite is constituted as a filter having dielectric confinement resonators and as a result comprises an evanescent mode waveguide and resonant cylinders placed in the waveguide. In addition, the cylinders are made of ferrite and means are provided for applying an adjustable magnetic field thereto, thereby enabling the center frequency of the filter to be shifted.
摘要翻译：由铁素体可调谐的敏感微波滤波器构成为具有介电限制谐振器的滤波器，其结果包括放置在波导中的ev逝模式波导和谐振圆柱。此外，气缸由铁氧体制成，并且提供用于向其施加可调磁场的装置，从而使得过滤器的中心频率能够移动。

5. 发明授权

US5025453A Method of measuring the signature of digital transmission equipment, and apparatus for implementing such a method 失效
标题翻译：数字传输设备的签名测量方法及其实现方法
公开(公告)号：US5025453A
公开(公告)日：1991-06-18
申请号：US450191
申请日：1989-12-13
申请人： Bertrand Hurinville
发明人： Bertrand Hurinville
IPC分类号： H04B3/20 , H04B7/015 , H04B17/00
CPC分类号： H04B17/101
摘要： A method of measuring the signature of digital transmission equipment, in which the measurement can be performed during operation without adding special apparatus, and in which: the digital filtering on transmission is varied in order to simulate multiple paths; and the depth of fading is varied at each of a plurality of frequencies until a predetermined error rate is obtained. The invention also provides apparatus for implementing the method. The invention is particularly suitable for use with digital radio links.
摘要翻译：一种测量数字传输设备的签名的方法，其中可以在操作期间进行测量而不添加专用设备，并且其中：传输上的数字滤波被改变以便模拟多个路径; 并且在多个频率中的每一个处改变衰落的深度，直到获得预定的错误率。本发明还提供了实现该方法的装置。本发明特别适用于数字无线电链路。

6. 发明授权

US5173902A Method of establishing an inverse pilot-sequence for deinterleaving as used in digital transmission 失效
标题翻译：在数字传输中使用的用于去交织的逆导频序列建立方法
公开(公告)号：US5173902A
公开(公告)日：1992-12-22
申请号：US874221
申请日：1992-04-27
申请人： Marc Darmon , Philippe Sadot
发明人： Marc Darmon , Philippe Sadot
IPC分类号： H03M13/27
CPC分类号： H03M13/27
摘要： A method of establishing an inverse pilot sequence for deinterleaving as used in digital transmission, with the interleaving being performed by means of a transmit register and a pilot sequence. Each portion (2 5 1 4 3 6) of the inverse pilot sequence is obtained from the preceding portion (3 1 6 5 4 2) of the inverse pilot sequence and from the two corresponding portions (2 6 1 5 4 3, 4 1 3 6 5 2) of the pilot sequence, with the k-th element of the N-th portion of the inverse pilot sequence being determined by observing the rank of the k-th element in the (N-1)-th portion of the pilot sequence in the N-th portion of the pilot sequence, and then in selecting the element to be found at this rank in the (N-1)-th portion of the inverse pilot sequence.
摘要翻译：一种用于在数字传输中使用的用于去交织的逆导频序列的方法，其中交织通过发送寄存器和导频序列来执行。逆导频序列的每个部分（2 5 1 4 3 6）从反向导频序列的前一部分（3 1 6 5 4 2）和两个对应部分（26 6 54 3，4 1 3 6 5 2），通过观察第（N-1）部分中第k个元素的秩，确定逆导频序列的第N个部分的第k个元素导频序列的第N个部分中的导频序列，然后在逆导频序列的第（N-1）部分中选择要在该等级找到的元素。

7. 发明授权

US5202902A Carrier recovery method for modulation having a large number of states, and apparatus for implementing the method 失效
标题翻译：具有大量状态的调制的载波恢复方法以及用于实现方法的装置
公开(公告)号：US5202902A
公开(公告)日：1993-04-13
申请号：US688396
申请日：1991-04-22
申请人： Marc Isard , Christophe Mostkowy
发明人： Marc Isard , Christophe Mostkowy
IPC分类号： H04L27/227 , H04L27/38
CPC分类号： H04L27/3818
摘要： A method of recovering the carrier for modulation having a large number of states, the method being wherein the demodulated constellation is brought to the monotonic range of a conventional estimator, with sufficient accuracy to enable autonomous operation on this new criterion. The invention also provides apparatus for implementing the method. The invention is particularly applicable to digital ratio beam transmission.
摘要翻译：一种恢复具有大量状态的调制载波的方法，所述方法是其解调的星座被带到传统估计器的单调范围，具有足够的精度以使得能够对该新标准进行自主操作。本发明还提供了实现该方法的装置。本发明特别适用于数字比例波束传输。

8. 发明授权

US5131009A Digital radio link receiving device 失效
标题翻译：数字无线电链接接收设备
公开(公告)号：US5131009A
公开(公告)日：1992-07-14
申请号：US551373
申请日：1990-07-11
申请人： Patrick Janer
发明人： Patrick Janer
IPC分类号： H04L27/22 , H04B7/15
CPC分类号： H04B1/30 , H03D3/004
摘要： The invention provides a digital radio link receiving device consisting of a microwave frequency part with a device for signal downconversion to an intermediate frequency, an intermediate frequency part limited to direct demodulation of the signal at intermediate frequency, and a baseband part responsible for processing the signal.
摘要翻译：本发明提供了一种数字无线电链路接收装置，包括微波频率部分和用于信号下变频到中频的装置，限于中频信号的直接解调的中频部分和负责处理信号的基带部分。

9. 发明授权

US5027371A Self-adaptive equalizer circuit for a differentially coherent demodulation installation 失效
标题翻译：用于差分相干解调装置的自适应均衡器电路
公开(公告)号：US5027371A
公开(公告)日：1991-06-25
申请号：US459411
申请日：1989-12-29
申请人： Philippe Sehier , Ghassan K. Kaleh
发明人： Philippe Sehier , Ghassan K. Kaleh
IPC分类号： H04B3/06 , H04B7/005 , H04L1/06 , H04L25/03
CPC分类号： H04L25/03038
摘要： A self-adaptive equalizer circuit for a receive using differential demodulation, and in particular for a receiver using a plurality of paths in diversity (1, 2). For each diversity path (1, 2) there is a self-adaptive filter (18, 19) placed before the differential demodulation. The coefficients (CO to Cn) of the filter are updated at each instant KT, where T is the symbol rate period, using the formula:Ci(k)=Ci(k-1)-.mu.. y(k-1). x(k-1)* . e(k)where .mu. is a real number much less than 1, e.g. equal to 0.001, where Ci(k) is the value given to the coefficient (Ci) at instant kT; Ci(k-1) is the value taken by the same coefficient Ci at the instant (k-1)T; y(K-1) is the output signal from the self-adaptive filter, the symbol being sampled at the symbol rate of period T; x(k-i)* is the complex conjugate value of the sample x(k-i) present in the filter at said instant kT and relating to the coefficient Ci; and e(k) is the above-mentioned error at the instant kT.
摘要翻译：一种用于使用差分解调的接收的自适应均衡器电路，特别是对于在分集（1,2）中使用多条路径的接收机。对于每个分集路径（1,2），存在放置在差分解调之前的自适应滤波器（18,19）。滤波器的系数（CO到Cn）在每个时刻KT被更新，其中T是符号速率周期，使用公式：Ci（k）= Ci（k-1）-mu。 y（k-1）。 x（k-1）*。 μ（k）其中mu是远小于1的实数，例如等于0.001，其中Ci（k）是瞬时kT给出系数（Ci）的值; Ci（k-1）是在时刻（k-1）T下由相同系数Ci取的值; y（K-1）是来自自适应滤波器的输出信号，符号以周期T的符号率采样; x（k-i）*是在所述瞬时kT存在于滤波器中并与系数Ci相关的样本x（k-i）的复共轭值; e（k）是瞬时kT的上述误差。

10. 发明授权

US5329536A Method and apparatus for sequentially decoding a digital stream encoded by a convolution type error-correcting code 失效
标题翻译：用于顺序解码由卷积型纠错码编码的数字流的方法和装置
公开(公告)号：US5329536A
公开(公告)日：1994-07-12
申请号：US676489
申请日：1991-03-28
申请人： Marc Darmon , Andre Bazet , Pascal Brelivet
发明人： Marc Darmon , Andre Bazet , Pascal Brelivet
IPC分类号： H03M13/23 , H03M13/39 , H04L1/00 , G06F11/10 , H03M13/12
CPC分类号： H03M13/39 , H04L1/0054
摘要： A method and apparatus for sequential decoding using the stack algorithm. A stack is used which is small in size and which has a leaky bottom. A counter stores the total count of nodes observed so as to abandon decoding if this count exceeds a fixed value. A comparator continuously compares the metric at the top of the stack with the largest metric lost from the bottom of the stack as stored in a memory. A small memory stores the path scanned through the logic tree, thereby directly providing the decoded block.
摘要翻译：一种使用堆栈算法进行顺序解码的方法和装置。使用尺寸小且底部有泄漏的堆叠。计数器存储观察到的节点的总计数，以便如果该计数超过固定值则放弃解码。比较器将堆栈顶部的度量与存储在存储器中的从堆栈底部丢失的最大度量进行比较。小存储器存储通过逻辑树扫描的路径，从而直接提供解码块。

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