公开(公告)号：US06704328B1

公开(公告)日：2004-03-09

申请号：US09360680

申请日：1999-07-26

申请人： Farideh Khaleghi ,  Nimal G. Senarath ,  Geng Wu ,  Robert Matyas ,  Parsyna R. Larijani ,  Mo-Han Fong

发明人： Farideh Khaleghi ,  Nimal G. Senarath ,  Geng Wu ,  Robert Matyas ,  Parsyna R. Larijani ,  Mo-Han Fong

IPC分类号： H04J322

CPC分类号： H04W52/362 ,  H04W52/26

摘要： In a wireless communications system, after a high data rate user is admitted and a supplemental channel is assigned to the user, a control message is sent to a receiver to communicate for power ramp-up and ramp-down profiles. The control message contains parameters of a data rate, a starting time and a duration of time as group in assigned fields in the message which is provided by a control signal source. In response to the control message, a controller provides a rate controllable signal with reference to the parameters of the control message to a data encoder. A bursty input data stream is fed to a buffer. The data encoder withdraws the data from the buffer in response to the rate controllable signal. The bit rate transitions in the bursty input data stream are smoothed with reference to the parameters. There is provided an output data stream having smoother data rate transitions than the input data stream. It is possible to solve problems with 3G CDMA systems which have sudden interference changes resulting from the bursty nature of high-speed data transmissions.

摘要翻译： 在无线通信系统中，在高数据速率用户被允许并且向用户分配补充信道之后，控制消息被发送到接收机以进行功率提升和斜降曲线的通信。 控制消息包含由控制信号源提供的消息中的分配字段中的组的数据速率，开始时间和持续时间的参数。 响应于控制消息，控制器参考控制消息的参数向数据编码器提供速率可控信号。 突发输入数据流被馈送到缓冲器。 数据编码器响应于速率可控信号从缓冲器中提取数据。 参考参数对突发输入数据流中的比特率转换进行平滑处理。 提供了具有比输入数据流更平滑的数据速率转换的输出数据流。 可以解决由于高速数据传输的突发性而导致的突发的干扰变化的3G CDMA系统的问题。

公开(公告)号：US5815308A

公开(公告)日：1998-09-29

申请号：US650536

申请日：1996-05-20

申请人： Hyung B. Kim ,  Farideh Khaleghi ,  Jinghui Li ,  Mohsen Kavehrad

发明人： Hyung B. Kim ,  Farideh Khaleghi ,  Jinghui Li ,  Mohsen Kavehrad

IPC分类号： H01S3/067 ,  H01S3/10 ,  H01S3/16 ,  H04B10/17 ,  H01J5/16 ,  H01S3/103 ,  H04B9/00

CPC分类号： H04B10/2971 ,  H01S3/10023 ,  H04B10/2912 ,  H01S3/06787 ,  H01S3/1003 ,  H01S3/1608

摘要： Bidirectional WDM transmission at 2.5 Gb/s using a bidirectional erbium-doped fiber amplifier (EDFA) is demonstrated over a distance of 300 km. A symmetrical EDFA configuration with a frequency tunable reflection attenuator is used as a bidirectional amplifier. Experimental results show that the allowable gain of the EDFA can be increased significantly while the associated bit error rate BER penalty remains negligible.

摘要翻译： 使用双向掺铒光纤放大器（EDFA），2.5 Gb / s的双向WDM传输在300公里的距离内展现。 具有频率可调谐反射衰减器的对称EDFA配置被用作双向放大器。 实验结果表明，EDFA的容许增益可以显着提高，相关的误码率BER值仍然可以忽略不计。

公开(公告)号：US6040933A

公开(公告)日：2000-03-21

申请号：US994761

申请日：1997-12-19

申请人： Farideh Khaleghi ,  Alan Glen Solheim ,  Chris Wilhelm Barnard

发明人： Farideh Khaleghi ,  Alan Glen Solheim ,  Chris Wilhelm Barnard

IPC分类号： H04J14/02 ,  H04B14/00 ,  H04B10/08

CPC分类号： H04J14/0221

摘要： A method and apparatus for channel performance equalization in wavelength division multiplexed (WDM) systems is disclosed. Performance of the channels is estimated from optical power measurements of each signal transmitted by the channels. The measurements are taken at the inputs of optical amplifiers in the transmission path of the system. The channels are equalized by adjusting the optical power of the channel transmitters. The method is applicable to point-to-point networks as well as more complex network configurations such as those having an add-drop multiplexer (ADM) for inserting and extracting channels from the transmission path. The method can compensate for signals having different bit rates by applying an offset to the amount of optical power adjustment of the channel transmitters. Furthermore, if different types of optical amplifiers are used in the transmission path, the method can accommodate different noise characteristics of the amplifiers by using their noise figures in determining the amount of optical power adjustment of the transmitters that is required to equalize channel performance.

摘要翻译： 公开了一种用于波分复用（WDM）系统中的信道性能均衡的方法和装置。 通过信道发送的每个信号的光功率测量来估计信道的性能。 在系统的传输路径中的光放大器的输入端进行测量。 通过调整信道发射机的光功率来平衡信道。 该方法适用于点到点网络以及更复杂的网络配置，例如具有用于从传输路径插入和提取信道的分插复用器（ADM）的那些。 该方法可以通过对信道发射机的光功率调整量施加偏移来补偿具有不同比特率的信号。 此外，如果在传输路径中使用不同类型的光放大器，则该方法可以通过在确定均衡信道性能所需的发射机的光功率调整量时使用它们的噪声指数来适应放大器的不同噪声特性。

公开(公告)号：US6008916A

公开(公告)日：1999-12-28

申请号：US934060

申请日：1997-09-19

申请人： Farideh Khaleghi

发明人： Farideh Khaleghi

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04B10/18 ,  H04B10/00 ,  H04B10/06

CPC分类号： H04B10/2507 ,  H04B10/07951 ,  H04B10/07953

摘要： The BER is used as a parameter for evaluating the performance of an optical transmission system. Performance of optical systems is also defined by the Q factor, which indicates the signal-to-noise ratio of the electric signal regenerated by the receiver. In the absence of distortion, Q is univocally determined by the BER. Q is calculated using an estimated BER measured with the path under normal conditions of operation, and a distortion-free Q is determined in the same operating point of the system. The distortion penalty for the path is obtained by comparing the measured Q with the distortion free Q. In addition, the distortion penalty for a transmitter-receiver pair, and a distortion penalty for a transmission link between the transmitter and receiver may be determined.

摘要翻译： BER用作评估光传输系统性能的参数。 光学系统的性能也由Q因子定义，Q因子表示由接收机再生的电信号的信噪比。 在没有失真的情况下，Q一致地由BER决定。 使用在正常操作条件下使用路径测量的估计BER来计算Q，并且在系统的相同操作点中确定无失真Q。 通过将测量的Q与无失真Q进行比较来获得路径的失真损失。此外，可以确定发射机 - 接收机对的失真惩罚以及发射机和接收机之间的传输链路的失真惩罚。

公开(公告)号：US07142865B2

公开(公告)日：2006-11-28

申请号：US10161143

申请日：2002-05-31

申请人： Shiau-He Shawn Tsai ,  Farideh Khaleghi ,  Patrik Nils Lundqvist

发明人： Shiau-He Shawn Tsai ,  Farideh Khaleghi ,  Patrik Nils Lundqvist

IPC分类号： H04B7/185 ,  H04Q7/00 ,  H04Q7/20

CPC分类号： H04W52/16 ,  H04L1/0001 ,  H04W52/26 ,  H04W52/44

摘要： A wireless receiver, such as in a mobile station or base station within a wireless communication network, estimates the frame error rate (FER) for one channel using signal information received on another, associated channel. As such, FER estimates may be generated for a channel of interest during discontinuous periods of that channel, or where the duty cycle of the channel is too low to support a desired FER estimation rate. Signal information received on the associated channel is manipulated as needed to conform to the format of the channel of interest, such as the encoding format, and then decoded as if it had been received on the channel of interest. Thus, the signal information is treated as virtually encoded data for the channel of interest, and may comprise essentially any type of signal that is known or determinable, such as a pilot, synchronization, traffic, or control channel.

公开(公告)号：US06298463B1

公开(公告)日：2001-10-02

申请号：US09126993

申请日：1998-07-31

申请人： Mark Bingeman ,  Amir Keyvan Khandani ,  Farideh Khaleghi

发明人： Mark Bingeman ,  Amir Keyvan Khandani ,  Farideh Khaleghi

IPC分类号： H03M1303

CPC分类号： H03M13/2778 ,  H03M13/2957 ,  H04L1/0071

摘要： In a parallel concatenated convolutional code (PCCC) or turbo code encoder, information bits are supplied to a first convolutional code encoder for producing first parity bits and via an interleaver to a second convolutional code encoder for producing second parity bits, the output of the encoder comprising the information bits and at least some of the first and second parity bits. The interleaver interleaves the information bits in groups each of N bits, where N is an integer greater than one. A parity bit generator can generate additional parity bits which are operated on by the convolutional code encoders and interleaver. A complementary decoder is described. The grouped interleaving can provide reduced memory requirements and faster convergence of the iterative decoding process.

摘要翻译： 在并行级联卷积码（PCCC）或turbo码编码器中，将信息比特提供给第一卷积码编码器，用于产生第一奇偶校验比特，并且经由交织器到第二卷积码编码器产生第二奇偶校验位，编码器的输出 包括信息位和第一和第二奇偶校验位中的至少一些。 交织器以N个比特中的每一个分组对信息比特进行交织，其中N是大于1的整数。 奇偶校验位产生器可以产生由卷积码编码器和交织器操作的附加奇偶校验位。 描述了互补解码器。 分组的交织可以提供减少的存储器要求和迭代解码过程的更快的收敛。

公开(公告)号：US07136483B2

公开(公告)日：2006-11-14

申请号：US10202570

申请日：2002-07-24

申请人： Farideh Khaleghi ,  Patrik Lundqvist ,  Shiau-He Tsai

发明人： Farideh Khaleghi ,  Patrik Lundqvist ,  Shiau-He Tsai

IPC分类号： H04L12/413

CPC分类号： H04W76/27 ,  H04W36/00 ,  H04W76/38 ,  H04W88/08 ,  H04W88/12

摘要： Mobile terminals in a high data rate CDMA system may be placed in a control hold mode wherein reverse link control channels are gated, or transmitted at a reduced duty cycle. Mode decisions are based on the activity of the mobile terminal in both the forward and reverse links. A forward link inactivity timer is maintained at the base station that schedules forward link communications to a mobile terminal. The reverse link inactivity timer may be maintained at the same base station, at a different base station in the mobile terminal's active set, or at the base station controller. The forward link inactivity timer may follow the mobile terminal's selection of best forward link serving base station in handoff. When both the forward and reverse link inactivity timers have expired, and no forward link data is pending, the mobile terminal may be commanded to a control hold mode.

摘要翻译： 高数据速率CDMA系统中的移动终端可以被置于控制保持模式，其中反向链路控制信道被选通或以减少的占空比发送。 模式决定基于移动终端在前向链路和反向链路中的活动。 前向链路不活动定时器在基站处被维持，该定时器调度到移动终端的前向链路通信。 反向链路不活动定时器可以保持在相同的基站，移动终端的活动集中的不同的基站处，或在基站控制器处。 正向链路不活动定时器可以跟随移动终端在切换中选择最佳前向链路服务基站。 当正向链路和反向链路不活动定时器都已经期满并且没有正向链路数据未决时，移动终端可以被命令到控制保持模式。

公开(公告)号：US06636746B1

公开(公告)日：2003-10-21

申请号：US09500426

申请日：2000-02-09

申请人： Bassam M. Hashem ,  Farideh Khaleghi

发明人： Bassam M. Hashem ,  Farideh Khaleghi

IPC分类号： H04B138

CPC分类号： H04W52/221 ,  H04W36/18 ,  H04W52/40

摘要： In a CDMA cellular radio system during soft handoff the base stations interpret the conventional power control commands sent by the mobile station according to a majority vote thus reducing the probability of responding to an erroneous power control command. Alternatively, during soft handoff every other power control command received is deliberately ignored. The base stations also synchronize their power levels periodically resulting in more optimum base station power transmission levels, in turn resulting in a reduction in system noise and an increase in system capacity.

摘要翻译： 在软切换期间的CDMA蜂窝无线电系统中，基站根据多数投票来解释由移动台发送的常规功率控制命令，从而降低响应错误功率控制命令的可能性。 或者，在软切换期间，接收的每个其他功率控制命令被故意忽略。 基站周期性地同步它们的功率电平，导致更优化的基站功率传输电平，从而导致系统噪声的降低和系统容量的增加。

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：US07190964B2

公开(公告)日：2007-03-13

申请号：US10040542

申请日：2002-01-04

申请人： Aleksandar Damnjanovic ,  Farideh Khaleghi

发明人： Aleksandar Damnjanovic ,  Farideh Khaleghi

IPC分类号： H04B7/00

CPC分类号： H04W52/40 ,  H04W52/325

摘要： The transmit power of a mobile station on the reverse link channel that carries channel state information, rate selection, and/or sector selection information is power controlled separately from the reverse link traffic channels when the mobile station is in soft handoff. The serving base station in the active set for the mobile station controls the mobile station transmit power on the rate control channel. The non-serving base stations control the transmit power on the reverse traffic channel.

摘要翻译： 当移动站处于软切换时，与反向链路业务信道分离地对携带信道状态信息，速率选择和/或扇区选择信息的反向链路信道上的移动站的发射功率进行功率控制。 用于移动站的活动集中的服务基站控制移动站在速率控制信道上的发射功率。 非服务基站控制反向业务信道上的发射功率。