公开(公告)号：WO1995015035A1

公开(公告)日：1995-06-01

申请号：PCT/GB1994002562

申请日：1994-11-22

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY ,  HOLLIER, Michael, Peter

Inventor： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

IPC: H04B03/46

CPC classification number: H04B1/665 ,  G01R23/20 ,  G10L25/69 ,  H04B3/46 ,  H04B3/542 ,  H04B2203/5408 ,  H04M1/24 ,  H04M3/2236 ,  H04M2201/40

Abstract: Telecommunications testing apparatus comprising analysis means arranged to receive a distorted signal which corresponds to a test signal when distorted by telecommunications apparatus to be tested, the analysis means comprising means for periodically deriving, from the distorted signal, a plurality of spectral component signals responsive to the distortion in each of a plurality of spectral bands, over a succession of time intervals, the analysis means being arranged to generate a measure of the subjective impact of the distortion due to the telecommunications apparatus, said measure of subjective impact being calculated to depend upon the spread of the distortion over time and/or said spectral bands.

Abstract translation: 电信测试装置，包括分析装置，被配置为当被要测试的电信设备失真时接收对应于测试信号的失真信号，所述分析装置包括用于周期性地从失真信号中导出多个频谱分量信号的装置， 在多个频谱带中的每一个中的失真在一系列时间间隔中，分析装置被布置成产生由于电信设备引起的失真的主观影响的量度，所述主观影响的测量被计算为取决于 随着时间和/或所述光谱带扩散失真。

公开(公告)号：WO1995013667A1

公开(公告)日：1995-05-18

申请号：PCT/US1994012772

申请日：1994-11-07

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  MELLONE, Charles, M. ,  SNOWDEN, Gregory, O.

IPC: H04B03/46

CPC classification number: H04L25/0262 ,  H04B1/16

Abstract: A selective call receiver (5) has a programmable baud detector (12, 14) which is programmed (30) to test (33) for an absence of a paging signal having a predetermined baud rate at a first falsing rate and then programmed (36) to test (38) for either the presence or absence of the signal at a second baud rate lower than the first falsing rate, wherein samples from the first test (33) are also used in the determination made by the second test (38).

Abstract translation: 选呼接收机（5）具有可编程波特率检测器（12,14），其被编程（30）以在没有寻呼信号的情况下测试（33），所述寻呼信号具有在第一伪造速率下的预定波特率，然后被编程（36 ）测试（38）以低于第一伪造速率的第二波特率存在或不存在信号，其中来自第一测试（33）的样本也用于由第二测试（38）进行的确定中， 。

公开(公告)号：WO1988009587A1

公开(公告)日：1988-12-01

申请号：PCT/US1988001633

申请日：1988-05-23

Applicant: HARRIS CORPORATION

Inventor： HARRIS CORPORATION ,  FAITH, Richard, W. ,  CURTIN, Leonard, E.

IPC: H04B03/46

CPC classification number: H04M3/30 ,  H04M3/42059 ,  H04M3/487 ,  H04M2242/22 ,  H04Q3/72

Abstract: A telephone ringback apparatus includes a microprocessor-controlled (150) communications device which is connectable with telephone equipment contained in a central office, such as a toll trunk facility, having the capability of identifying the number of a calling party. In response to the telephone user dialing a prescribed ringback access code, the apparatus signals the toll trunk facility causing it to transmit a message representative of the number of the telephone from which the user is calling. Upon receipt of this message the telephone number of the calling party is stored. A synthesized voice message is transmitted to the user instructing the user to hang-up. When the apparatus detects that the phone has been placed back on-hook, it proceeds to transmit dialing signals containing the previously stored number of the telephone, causing the calling party's telephone to ring. As an additional feature the apparatus is designed to carry out prescribed signalling tests, in response to prescribed test codes input by a craftsperson. Depending on the contents of a test code the apparatus may generate a series of prescribed tones or terminate the line with a precision impedance, enabling the craftsperson to conduct line quality measurements from his calling location.

公开(公告)号：WO1994028637A1

公开(公告)日：1994-12-08

申请号：PCT/US1994005154

申请日：1994-05-11

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  BIRCHLER, Mark, Allen ,  JASPER, Steven, Charles ,  WILSON, Timothy, John

IPC: H04B03/46

CPC classification number: H04B17/20

Abstract: A receiver that receives (203) a stream of information symbols (101) may detect that usability of the stream of information symbols received as follows. Upon receiving the stream of information symbols (101), the receiver (203) separates the stream of information symbols into a desired portion and an undesired portion wherein the desired portion is the originally transmitted stream of information symbols and the undesired portion is interference and noise (204). From the undesired portion and the desired portion, the usability can be determined based on a ratio of the two portions.

Abstract translation: 接收（203）信息符号流（101）的接收机可以检测如下接收的信息符号流的可用性。 在接收到信息符号流（101）时，接收机（203）将信息符号流分离成期望部分和不期望部分，其中期望部分是原始传输的信息符号流，而不期望的部分是干扰和噪声 （204）。 从不期望的部分和期望的部分，可用性可以基于两个部分的比例来确定。

公开(公告)号：WO1993015563A1

公开(公告)日：1993-08-05

申请号：PCT/GB1993000178

申请日：1993-01-28

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  BROWNLIE, John, David

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04B03/46

CPC classification number: H04B3/462

Abstract: Modems 1, 2 undertake a start-up sequence in which modem 1 transmits a first multi-frequency test signal; modem 2 measures the SNR of the first test signal; modem 2 transmits a time reference to modem 1; modem 1 responds by switching from the first test signal to a second such signal having a different power from the first; modem 2 measures the SNR of the second test signal and also recognises the timing of the power transition to determine the duration of the delay between the time reference and the transition.

Abstract translation: 调制解调器1,2承担调制解调器1发送第一多频测试信号的启动序列; 调制解调器2测量第一测试信号的SNR; 调制解调器2向调制解调器1发送时间参考; 调制解调器1通过从第一测试信号切换到具有与第一测试信号不同的功率的第二信号来进行响应; 调制解调器2测量第二测试信号的SNR，并且还识别功率转换的定时，以确定时间参考和转换之间的延迟的持续时间。

公开(公告)号：WO1992017949A1

公开(公告)日：1992-10-15

申请号：PCT/DE1992000239

申请日：1992-03-19

Applicant: SIEMENS AKTIENGESELLSCHAFT ,  ARWEILER, Hans, Werner ,  WOLF, Andreas

Inventor： SIEMENS AKTIENGESELLSCHAFT

IPC: H04B03/46

CPC classification number: H04Q11/045 ,  H04B3/46

Abstract: The invention relates to a process for finding the transmission properties (H(jf)) of an electric line (2) in an ISDN system in which a test signal (m(t)) is applied to one end of the line (2) and at the other end the reception signal (g(t)) produced by the test signal (m(t)) is evaluated. In order to be able to conduct such a process with a test signal with a crest factor of one with relatively little cost, the test signal used is a binary, bipolar random numerical sequence signal (m(t)) with the crest factor one and the reception signal (g(t)) is scanned at time intervals corresponding to the period of the test signal (m(t)) and subjected to a Fourier transformation to provide a spectrum signal (G(jf)); the latter is complexly multiplied by a reference spectrum Mi(jf) to provide an output signal (H(jf)) which provides a measure for the transmission properties of the line (31).

公开(公告)号：WO1989008354A1

公开(公告)日：1989-09-08

申请号：PCT/DE1989000115

申请日：1989-02-28

Applicant: PHILIPS PATENTVERWALTUNG GMBH ,  N.V. PHILIPS GLOEILAMPENFABRIEKEN ,  SIEMENS AKTIENGESELLSCHAFT ,  HERRMANN, Karl ,  NARJES, Ferdinand ,  STEINER, Erhard ,  WEIMERT, Günter

Inventor： PHILIPS PATENTVERWALTUNG GMBH ,  N.V. PHILIPS GLOEILAMPENFABRIEKEN ,  SIEMENS AKTIENGESELLSCHAFT

IPC: H04B03/46

CPC classification number: H04B3/46 ,  H04B17/406

Abstract: In a process for controlling and/or monitoring, in which a calling unit (7, 8) exchanges information with processing units (6) in polling-selecting mode, the processing units (6) can be switched from a first to a second transmission mode. In the first transmission mode, the telegrams are switched through without intermediate storage, whereas in the second transmission mode, they are switched through only in the absence of errors. The process can be advantageously used in devices for in-process monitoring of devices in communication engineering.

Abstract translation: 在用于控制和/或监视的过程中，呼叫单元（7,8）以轮询选择模式与处理单元（6）交换信息，处理单元（6）可以从第一传输 模式。 在第一传输模式中，电报被切换而无需中间存储，而在第二传输模式中，它们仅在没有错误的情况下被切换。 该过程可以有利地用于在通信工程中的设备的在线监测的设备中。

公开(公告)号：WO1998025355A1

公开(公告)日：1998-06-11

申请号：PCT/US1997019998

申请日：1997-10-24

Applicant: PACKETEER, INC.

Inventor： PACKETEER, INC. ,  PACKER, Robert, L.

IPC: H04B03/46

CPC classification number: H04L47/263 ,  H04L29/06 ,  H04L47/10 ,  H04L47/14 ,  H04L47/225 ,  H04L47/27 ,  H04L47/283 ,  H04L69/16 ,  H04L69/163 ,  Y02D50/10

Abstract: A method for data flow rate detection useful with data flow rate control is introduced into a TCP packet communication environment which does not have data rate supervision by computing presumed speed based on latency between packets during initial interchange of synchronization (SYN) packet and the acknowledgement (ACK) packet, presuming to know the initial length of each. This information may be utilized to determine potential rate of data flow for further use in making bandwidth allocation and rate enforcement decision.

Abstract translation: 将数据流速控制用于数据流速检测的方法被引入到TCP分组通信环境中，该TCP分组通信环境通过在初始同步（SYN）分组和确认（SYN）分组之间基于分组之间的等待时间来计算假设速度而不具有数据速率监视 ACK）包，假定知道每个的初始长度。 该信息可以用于确定在进行带宽分配和速率执行决定时进一步使用的数据流的潜在速率。

公开(公告)号：WO1994008402A1

公开(公告)日：1994-04-14

申请号：PCT/US1993008789

申请日：1993-09-16

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LAROSA, Christopher, P. ,  CARNEY, Michael, J.

IPC: H04B03/46

CPC classification number: H04L1/208 ,  H04B1/1027 ,  H04B17/20

Abstract: The present disclosure includes a discussion of a method of and apparatus for channel quality estimation (CQE) (131) in a receiver (111). Each channel is divided into observation intervals and sub-intervals. The duration of the sub-interval is chosen as the largest interval in which the channel is essentially static. The CQE (131) generates error information (129) for each symbol of the sub-interval and collects the error information for a symbol interval forming a sub-interval error value. The CQE (131) maps the sub-interval error value into a sub-interval bit error rate (BER) estimate. The mapping is a non-linear function dependent on the specific radio system. Then, the CQE (131) averages the sub-interval BER estimates over the entire observation interval, forming an interval BER estimate. Finally, the CQE (131) compares the interval BER estimate to a predetermined threshold, forming a channel quality estimation decision for each observation interval.

Abstract translation: 本公开包括对接收机（111）中的信道质量估计（CQE）（131）的方法和装置的讨论。 每个通道分为观察间隔和子间隔。 选择子间隔的持续时间作为信道本质上是静态的最大间隔。 CQE（131）针对子间隔的每个符号生成错误信息（129），并收集形成子间隔误差值的符号间隔的错误信息。 CQE（131）将子间隔误差值映射为子区间误码率（BER）估计。 映射是取决于特定无线电系统的非线性函数。 然后，CQE（131）对整个观测间隔的子区间BER估计进行平均，形成间隔BER估计。 最后，CQE（131）将间隔BER估计与预定阈值进行比较，形成每个观测间隔的信道质量估计决定。

公开(公告)号：WO1992013397A1

公开(公告)日：1992-08-06

申请号：PCT/CH1992000004

申请日：1992-01-10

Applicant: VOCKENHUBER, Peter

IPC: H04B03/46

CPC classification number: H04B5/0018 ,  H04Q9/00

Abstract: Switching points (2) are addressed along a cable (1) and information is transmitted to or received by the addressed switching points by an information conductor (3). The switching points are arranged inside the cable sheath (5) and inside the screening (6) in order to protect them from environmental conditions and electromagnetic interference. The information is transmitted through the cable sheathings (5) and/or (6). A physical value for which the sheathings (5) and (6) are transparent is modulated according to the information to be transmitted.