公开(公告)号：US06373842B1

公开(公告)日：2002-04-16

申请号：US09195400

申请日：1998-11-19

申请人： Paul Coverdale ,  Leo Strawczynski

发明人： Paul Coverdale ,  Leo Strawczynski

IPC分类号： H04L1256

CPC分类号： H04L1/1848 ,  H04L1/1812 ,  H04L1/1838 ,  H04W28/14 ,  H04W80/00

摘要： A high layer protocol organizes Unidirectional Streaming Services (USS) data into frames and said data is transmitted to the wireless user's terminal. The USS data is not delivered until a criteria is satisfied, e.g., the receive buffer is filled to an appropriate value. After the USS data is received, the receiver verifies the received frames. If an error is detected a message is sent from the wireless terminal to the server (providing the unidirectional streaming service) requesting retransmission of the corrupted frame. This is a form of ARQ protocol. If the retransmitted frame arrives prior to the time that frame needs to be delivered, the corrupted frame is replaced by the retransmitted frame. Otherwise, if the retransmitted frame is not received prior to the time that frame needs to be delivered, the corrupted frame is reconstructed. Any retransmitted frame which arrives too late is discarded. An additional benefit of the present invention is that since the frames are buffered prior to delivery, interpolation, as opposed to extrapolation, can be used to improve the reconstruction quality of the corrupted frame. This optional feature of the invention uses both the preceding and succeeding frames, which are available in the buffer, to provide a better estimate of the corrupted frame.

摘要翻译： 高层协议将单向流服务（USS）数据组织成帧，所述数据被传送到无线用户的终端。 在满足标准之前USS数据不被传送，例如，接收缓冲器被填充到适当的值。 在接收到USS数据之后，接收机验证接收到的帧。 如果检测到错误，则从无线终端向服务器（提供单向流服务）发送请求重发已损坏帧的消息。 这是一种ARQ协议的形式。 如果重传的帧在需要传送帧的时间之前到达，则被重新发送的帧被替换。 否则，如果在需要传送帧的时间之前没有接收到重传的帧，则重建损坏的帧。 任何到达太晚的重发帧被丢弃。 本发明的另外的好处在于，由于帧在传送之前被缓冲，所以与外推相反的内插可以用于改善损坏的帧的重建质量。 本发明的该可选特征使用在缓冲器中可用的前一帧和后续帧来提供对损坏帧的更好估计。

公开(公告)号：US07894724B2

公开(公告)日：2011-02-22

申请号：US11094396

申请日：2005-03-31

申请人： Chandra Bontu ,  Leo Strawczynski

发明人： Chandra Bontu ,  Leo Strawczynski

IPC分类号： H04B10/00

CPC分类号： H04J14/06 ,  H04B10/2572

摘要： A method and system for averaging the effects of polarization distortions across a multitude of transmitted data streams in a dual polarization multiplexed optical communications system. Data streams are interleaved amongst each other in accordance with a predetermined pattern. The interleaved data streams are symbol mapped and modulated to provide a pair of optical signals. The pair of optical signals are orthogonally polarized, and multiplexed for transmission across an optical fiber. A receiver circuit receives the transmitted signal and extracts the interleaved data streams. The interleaved data streams are de-interleaved to generate the original data streams. While the data streams can be interleaved and transmitted via a single wavelength optical signal, the data streams can be interleaved and transmitted over two or more different wavelength optical signals to further mitigate the effects of polarization distortions.

摘要翻译： 一种用于在双极化复用光通信系统中对多个传输数据流之间的偏振失真的影响进行平均的方法和系统。 数据流根据预定模式彼此交错。 交织的数据流被符号映射和调制以提供一对光信号。 这对光信号被正交极化，并被多路复用以在光纤之间传输。 接收机电路接收发送的信号并提取交织的数据流。 交织的数据流被解交织以产生原始数据流。 虽然数据流可以通过单波长光信号进行交织和传输，但数据流可以通过两个或多个不同波长的光信号进行交织和传输，以进一步减轻极化失真的影响。

公开(公告)号：US07356256B1

公开(公告)日：2008-04-08

申请号：US10629834

申请日：2003-07-30

申请人： Leo Strawczynski ,  Kim B. Roberts ,  John McNicol

发明人： Leo Strawczynski ,  Kim B. Roberts ,  John McNicol

IPC分类号： H04B10/08

CPC分类号： H04B10/077 ,  H04B10/07955 ,  H04B2210/258

摘要： A digital performance monitoring method and system for an optical communications system utilizes a channel monitor and a digital signal processor (DSP). The channel monitor is designed to monitor a respective channel signal of the optical communications system, and includes a sample memory for storing sample data including a set of sequential N-bit (where N>1) samples generated by an Analog-to-Digital (A/D) converter at a predetermined sample rate. The digital signal processor (DSP) is designed to calculate at least one performance parameter of the optical communications system based on the stored sample data. The sample rate of the A/D converter is at least equal to a baud rate of the channel, and preferably satisfies the Nyquist criterion. Multiple A/D converters may be used parallel to sample respective orthogonal components of the channel signal. In this case, the stored sample data may be representative of the complex E-field of the channel signal.

摘要翻译： 用于光通信系统的数字性能监测方法和系统利用信道监视器和数字信号处理器（DSP）。 信道监视器被设计为监视光通信系统的相应信道信号，并且包括用于存储样本数据的采样存储器，该采样数据包括由模数（数字）信号产生的一组顺序N位（其中N≥1） A / D）转换器。 数字信号处理器（DSP）被设计为基于存储的采样数据来计算光通信系统的至少一个性能参数。 A / D转换器的采样率至少等于通道的波特率，并且优选地满足奈奎斯特准则。 可以并行地使用多个A / D转换器来采样信道信号的各个正交分量。 在这种情况下，存储的采样数据可以表示信道信号的复电场。

公开(公告)号：US20060228116A1

公开(公告)日：2006-10-12

申请号：US11094396

申请日：2005-03-31

申请人： Chandra Bontu ,  Leo Strawczynski

发明人： Chandra Bontu ,  Leo Strawczynski

IPC分类号： H04B10/00

CPC分类号： H04J14/06 ,  H04B10/2572

摘要： A method and system for averaging the effects of polarization distortions across a multitude of transmitted data streams in a dual polarization multiplexed optical communications system. Data streams are interleaved amongst each other in accordance with a predetermined pattern. The interleaved data streams are symbol mapped and modulated to provide a pair of optical signals. The pair of optical signals are orthogonally polarized, and multiplexed for transmission across an optical fibre. A receiver circuit receives the transmitted signal and extracts the interleaved data streams. The interleaved data streams are de-interleaved to generate the original data streams. While the data streams can be interleaved and transmitted via a single wavelength optical signal, the data streams can be interleaved and transmitted over two or more different wavelength optical signals to further mitigate the effects of polarization distortions.

摘要翻译： 一种用于在双极化复用光通信系统中对多个传输数据流之间的偏振失真的影响进行平均的方法和系统。 数据流根据预定模式彼此交错。 交织的数据流被符号映射和调制以提供一对光信号。 这对光信号被正交极化，并被多路复用以在光纤之间传输。 接收机电路接收发送的信号并提取交织的数据流。 交织的数据流被解交织以产生原始数据流。 虽然数据流可以通过单波长光信号进行交织和传输，但数据流可以通过两个或多个不同波长的光信号进行交织和传输，以进一步减轻极化失真的影响。

公开(公告)号：US20060078336A1

公开(公告)日：2006-04-13

申请号：US10531314

申请日：2003-07-11

申请人： John McNicol ,  Kieran Parsons ,  Leo Strawczynski ,  Kim Roberts ,  Maurice O'Sullivan

发明人： John McNicol ,  Kieran Parsons ,  Leo Strawczynski ,  Kim Roberts ,  Maurice O'Sullivan

IPC分类号： H04B10/12

CPC分类号： H04B10/07951 ,  H04B10/07953 ,  H04B10/25137 ,  H04B10/505 ,  H04B10/50597 ,  H04B10/508 ,  H04B10/6161

摘要： Optical dispersion imposed on a communications signal conveyed through an optical communications system is compensated by modulating the communications signal in the electrical domain. A compensation function is determined that substantially mitigates the chromatic dispersion. The communications signal is then modulated in the electrical domain using the compensation function. In preferred embodiments, compensation is implemented in the transmitter, using a look-up-table and digital-to-analog converter to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system.

摘要翻译： 施加在通过光通信系统传送的通信信号上的光色散通过调制电域中的通信信号来补偿。 确定基本上减轻色散的补偿功能。 然后使用补偿功能在电域中调制通信信号。 在优选实施例中，使用查找表和数模转换器来在发射机中实现补偿以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。

公开(公告)号：US20050201368A1

公开(公告)日：2005-09-15

申请号：US11124750

申请日：2005-05-09

申请人： Shalini Periyalwar ,  Wen Tong ,  Leo Strawczynski

发明人： Shalini Periyalwar ,  Wen Tong ,  Leo Strawczynski

IPC分类号： H04B7/26 ,  H04J3/16 ,  H04J11/00 ,  H04L1/00 ,  H04L1/08 ,  H04L1/20 ,  H04L12/56 ,  H04W72/04 ,  H04W74/02 ,  H04W74/04 ,  H04W99/00 ,  H04L12/66

CPC分类号： H04L1/0068 ,  H04B7/2656 ,  H04J3/1682 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0071 ,  H04L1/08 ,  H04L1/20 ,  H04L45/00 ,  H04W74/02 ,  H04W74/04 ,  H04W99/00

摘要： A frame structure that is ordinarily optimized for providing variable high data rates also includes the flexibility to efficiently carry lower data rate, lower latency frames using sub-framing. Superframes, each comprised of a predetermined number of frames, carry voice and data communications at one or more variable data rates. The size of a superframe is limited, such as by the delay tolerance for voice transmission, typically 20 ms. Each voice customer is allotted one or more frames or portions of frames within the superframe, called sub-frames, as is needed to deliver the lower data rate, low latency voice communication. The allocation for the voice customers is not fixed, but varies as the data rate varies over time. Any bits in a frame that are not needed to carry voice communication are assigned to carry data having compatible data rate requirements. Additionally, the sub-framing concept may be extended to include ATM cells.

摘要翻译： 通常针对提供可变高数据速率进行优化的帧结构还包括有效地承载较低数据速率的灵活性，使用子帧的低延迟帧。 每个由预定数量的帧组成的超帧以一个或多个可变数据速率进行语音和数据通信。 超帧的大小受限于语音传输的延迟容限，通常为20ms。 每个语音客户被分配在超帧内的一个或多个帧或部分帧，称为子帧，这是为了提供较低数据速率，低延迟语音通信所需要的。 语音客户的分配不是固定的，而是随着时间的推移而变化。 分配不需要携带话音通信的帧中的任何比特携带具有兼容数据速率要求的数据。 另外，子框架概念可以扩展到包括ATM信元。

公开(公告)号：US06381232B1

公开(公告)日：2002-04-30

申请号：US09221343

申请日：1998-12-28

申请人： Leo Strawczynski ,  William A. Gage

发明人： Leo Strawczynski ,  William A. Gage

IPC分类号： H04Q720

CPC分类号： H04W36/18

摘要： Methods and apparatus are disclosed for improving performance of handoff in a telecommunications system having a plurality of base stations and a mobile unit in handoff communication (uplink only or in both uplink and downlink) with at least two of the base stations over at least first and second respective communications links. The first and second communications links each comprise at least one base station transceiver subsystem (BTS), at least one radio connection controller (RCC), at least one mobile switching center (MSC), and at least one transcoder or data server. The RCC checks whether a given information frame from any of the BTSs is valid. If one or more information frames is valid, then the RCC forwards a valid frame to the transcoder or a data server. If none of the received frames is valid, the RCC then decodes a R=1/n code constructed from data received from the BTSs and checks whether the decoded information frame is valid using a checksum or CRC transmitted with the information frame. If the information frame is valid, it is forwarded to the transcoder or data server. If it is not valid, then the RCC sends either an invalid frame, indicated as such, or a “control” frame indicating an “errored” invalid frame was received.

摘要翻译： 公开了用于改善具有多个基站和移动单元的电信系统中的切换性能的方法和装置，所述移动单元在越区切换通信（仅在上行链路上，或仅在上行链路和下行链路中）与至少两个基站在至少第一和第 第二个相应的通信链路。 第一和第二通信链路各自包括至少一个基站收发器子系统（BTS），至少一个无线电连接控制器（RCC），至少一个移动交换中心（MSC）以及至少一个代码转换器或数据服务器。 RCC检查来自任何BTS的给定信息帧是否有效。 如果一个或多个信息帧有效，则RCC将有效帧转发到代码转换器或数据服务器。 如果接收到的帧都没有有效，则RCC对从BTS接收到的数据构成的R = 1 / n码进行解码，并使用与信息帧一起发送的校验和或CRC来检查解码信息帧是否有效。 如果信息帧有效，则转发到代码转换器或数据服务器。 如果无效，则RCC发送无效帧，如此指示，或者接收到指示“错误”无效帧的“控制”帧。

公开(公告)号：US06317422B1

公开(公告)日：2001-11-13

申请号：US09060604

申请日：1998-04-15

申请人： Farideh Khaleghi ,  Norman P. Secord ,  Leo Strawczynski

发明人： Farideh Khaleghi ,  Norman P. Secord ,  Leo Strawczynski

IPC分类号： H04B7216

CPC分类号： H04J13/10 ,  H04B2201/709709 ,  H04J13/0022

摘要： Methods and apparatus for generating spreading codes in a CDMA system are disclosed in accordance with the teachings of the present invention wherein the system includes a pseudonoise (PN) code generator and a logic device configured to replace a portion of a PN code generated by the PN code generator with at least one zero or to add at least one zero to a PN code generated by the PN code generator. The PN code generator generates a PN code made up of chips. One or more of these chips may be replaced by zeros or one or more zeros may be inserted between chips. Thus, when combined at a chip level with a substantially orthogonal code such as a Walsh code the resulting spreading code will be less effected and in some instances not effected at all by certain time delays inserted into the system (i.e time lag from multi-path dispersive transmissions).

摘要翻译： 根据本发明的教导公开了用于在CDMA系统中产生扩展码的方法和装置，其中该系统包括伪噪声（PN）码发生器和被配置为替换由PN产生的PN码的一部分的逻辑装置 代码生成器，其具有至少一个零，或者将至少一个零加到由PN码发生器产生的PN码中。 PN码发生器产生由码片组成的PN码。 这些芯片中的一个或多个可以被零代替，或者可以在芯片之间插入一个或多个零。 因此，当在芯片级与诸如沃尔什码之类的基本上正交的代码组合时，所得到的扩展码将不太受到影响，并且在某些情况下根本不会通过插入到系统中的某些时间延迟来实现（即，从多路径 分散传输）。

公开(公告)号：US06249253B1

公开(公告)日：2001-06-19

申请号：US09290623

申请日：1999-04-13

申请人： Jorgen S. Nielsen ,  Leo Strawczynski

发明人： Jorgen S. Nielsen ,  Leo Strawczynski

IPC分类号： G01S502

CPC分类号： G01S19/46 ,  G01S19/235 ,  G01S19/41 ,  H04B7/18554 ,  H04B7/216

摘要： The time of arrival of a global positioning system signal and the time of arrival of a code division multiple access pilot signal, from a base station, are estimated at a mobile radiotelephone. Both estimates are performed relative to a local clock in the radiotelephone. These signals are calibrated for the time delay produced by the transmitter at the base station and the time delay produced by the receiver in the radiotelephone.

摘要翻译： 在移动无线电话机处估计来自基站的全球定位系统信号的到达时间和码分多址导频信号的到达时间。 两个估计都是相对于无线电话中本地时钟执行的。 这些信号是由发射机在基站产生的时间延迟以及接收机在无线电话中产生的时间延迟进行校准的。

公开(公告)号：US6148422A

公开(公告)日：2000-11-14

申请号：US946312

申请日：1997-10-07

申请人： Leo Strawczynski ,  Bill Gage ,  Rafi Rabipour

发明人： Leo Strawczynski ,  Bill Gage ,  Rafi Rabipour

IPC分类号： H04L1/00 ,  H04L1/24

CPC分类号： H04L1/0057 ,  H04L1/24

摘要： The present invention provides a system and a method for improving the voice quality of wireless-to-wireless calls. More specifically, the invention provides a method and an apparatus to add supplemental information for better error detection and correction of data packets. This feature allows the identification of the telecommunication link causing errors in the data packets and optimizes the use of the reconstructed data packets.

摘要翻译： 本发明提供一种用于提高无线到无线呼叫的语音质量的系统和方法。 更具体地，本发明提供了一种添加补充信息以更好地进行数据分组的错误检测和校正的方法和装置。 该特征允许识别导致数据分组中的错误的电信链路，并优化重构数据分组的使用。