公开(公告)号：US5119196A

公开(公告)日：1992-06-02

申请号：US542612

申请日：1990-06-25

申请人： Ender Ayanoglu ,  Israel Bar-David ,  Richard D. Gitlin ,  Chih-Lin I ,  Jack H. Winters

发明人： Ender Ayanoglu ,  Israel Bar-David ,  Richard D. Gitlin ,  Chih-Lin I ,  Jack H. Winters

IPC分类号： H04N5/21

CPC分类号： H04N5/211

摘要： Ghosts are canceled in received analog TV (for IDTV, EDTV, and HDTV) signals by utilizing the fact that there are short periods of time without the analog signals (the horizontal flyback interval between the lines) to process the received signal on a line-to-line basis using a finite impulse response (FIR) or an infinite impulse response (IIR) equalizer. This line-by-line processing (which can be implemented by periodic cleansing of the equalizer) overcomes the limitations of standard equalizers to allow for 40-50 dB of suppression of ghosts, even with nulls in the spectrum, as long as the ghost delay is less than the period of time without the analog signal. Furthermore, by using time inversion in combination with line-by-line processing, the stability problem of the conventional IIR equalizer is eliminated. The IIR equalizer may be implemented on a single digital integrated circuit. Alternatively, an FIR equalizer can be used which, although it may require multiple chips (i.e., more taps), can acquire and adapt to the ghosted channel more rapidly than an IIR equalizer. With line-by-line processing, FIR and IIR equalizers can eliminate any ghost with delays up to 11 .mu.sec in IDTV or EDTV. For larger delays, a standard IIR or FIR equalizer can be used as a preprocessor to eliminate small ghosts and an adaptive antenna can be used to eliminate large ghosts. Thus, with these techniques, the ghosting problem can be eliminated in all TV receivers.

公开(公告)号：US5007067A

公开(公告)日：1991-04-09

申请号：US414874

申请日：1989-09-29

申请人： Ender Ayanoglu ,  Richard D. Gitlin ,  Chih-Lin I ,  James E. Mazo

发明人： Ender Ayanoglu ,  Richard D. Gitlin ,  Chih-Lin I ,  James E. Mazo

IPC分类号： H04L1/22 ,  H04L1/02 ,  H04L25/49

CPC分类号： H04L1/02 ,  H04L25/4908

摘要： This invention is a technique for the substantially instantaneous self-healing of digital communications networks. Digital data streams from each of N nearby sources are combined and encoded to produce N+M coded data streams using a coding algorithm. The N+M coded data streams are then each transmitted over a separate long haul communications link to a decoder where any N of the N+M coded data streams can be decoded uniquely to produce the original N data streams. The orginal N data streams are then distributed to their respective separate end destinations. If any M or less of the N+M long haul communications links fails, i.e. as in a telephone line that gets cut or a long distance switch that fails, no rerouting of traffic need be done. Rather, the receiver detects loss of carrier on the failed link(s), and immediately supplies the missing data by decoding the data from the at least N remaining links. The technique overcomes a long felt problem of trying to reroute traffic by using sophisticated resource allocation techniques when a communications link fails.

公开(公告)号：US5625884A

公开(公告)日：1997-04-29

申请号：US255684

申请日：1994-06-08

申请人： Richard D. Gitlin ,  Chih-Lin I

发明人： Richard D. Gitlin ,  Chih-Lin I

IPC分类号： H04W68/00 ,  H04B7/00

CPC分类号： H04W68/00

摘要： A method and apparatus providing communications between mobile units and other communications devices, is disclosed wherein, in response to a request to call a mobile unit from an originating communications device, a paging signal is sent via a global communications network and received by a mobile unit. The paging signal contains caller and callee identification codes, which are decoded by the mobile unit. A paging response signal, in the form of a reverse call setup signal, is then transmitted from the mobile unit to the originating communications device. Transmission of the paging signal is preferably stopped when a correspondence condition exists such that the caller and callee identification codes of the paging signal correspond to the caller and caller identification codes of the paging response signal.

摘要翻译： 公开了一种在移动单元和其他通信设备之间提供通信的方法和装置，其中响应于从始发通信设备呼叫移动单元的请求，经由全球通信网络发送寻呼信号并由移动单元接收 。 寻呼信号包含由移动单元解码的呼叫者和被叫者识别码。 然后，以反向呼叫建立信号的形式的寻呼响应信号从移动单元发送到始发通信设备。 当存在呼叫信号的呼叫者和被呼叫者识别码对应于呼叫者和寻呼响应信号的呼叫者识别码时，寻呼信号的发送最好停止。

公开(公告)号：US5442625A

公开(公告)日：1995-08-15

申请号：US242471

申请日：1994-05-13

申请人： Richard D. Gitlin ,  Chih-Lin I

发明人： Richard D. Gitlin ,  Chih-Lin I

IPC分类号： H04B1/707 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/18 ,  H04J99/00 ,  H04L1/00 ,  H04L1/08

CPC分类号： H04L1/0041 ,  H04B7/264 ,  H04J13/0048 ,  H04J13/107 ,  H04J13/18 ,  H04L1/0022 ,  H04L1/08 ,  H04B2201/70705 ,  H04L1/0059 ,  H04L1/0071 ,  H04W52/26

摘要： A multi-code code division multiple access system allows a user at a radio transmitter unit to dynamically change its source data bit rate. In response to a user input selecting one of the plurality of source bit rates, an adjustable coding circuit in the transmitter spreads and transmits the user's digital bit stream received at the selected bit rate to a channel bit rate which at least equals the highest bit rate of the plurality of source bit rates. The plurality of source bit rates includes a basic bit rate R and at least one bit rate which is a multiple M of the basic bit rate R, where M is an integer of at least 1. The user's input selects a particular user source bit rate by identifying a basic bit rate multiple M to a base station that is to receive the transmission.

摘要翻译： 多码分码多址系统允许无线电发射机单元的用户动态地改变其源数据比特率。 响应于选择多个源比特率之一的用户输入，发射机中的可调节编码电路将以所选比特率接收的用户数字比特流扩展并发送至至少等于最高比特率的信道比特率 的多个源比特率。 多个源比特率包括基本比特率R和至少一个比特率，其是基本比特率R的多M，其中M是至少为1的整数。用户的输入选择特定用户源比特率 通过向要接收传输的基站识别基本位速率M M。

公开(公告)号：US06201799B1

公开(公告)日：2001-03-13

申请号：US08846454

申请日：1997-05-01

申请人： Howard C. Huang ,  Chih-Lin I

发明人： Howard C. Huang ,  Chih-Lin I

IPC分类号： H04B1500

CPC分类号： H04B1/71052 ,  H04B1/709 ,  H04B1/7107 ,  H04B1/7115

摘要： A Multicode (MC) Code Division Multiple Access (CDMA) receiver receives J encoded multicode channels (where J>1) over L multiple air signal paths (where L>1) and forms a decorrelator output vector in which for each of the J multicode channels, the interference caused by the other J−1 multicode channels has been cancelled. When the MC CDMA receiver is a coherent receiver, a pilot interference canceller cancels a received pilot signal from the J channel code of each of the received J multicode channels prior to forming the decorrelator output vector.

摘要翻译： 多码（MC）码分多址（CDMA）接收机通过L多个空中信号路径（其中L> 1）接收J个编码多码信道（其中J> 1），并形成去相关器输出向量，其中对于每个J多码 通道，其他J-1多通道通道造成的干扰已被取消。 当MC CDMA接收机是相干接收机时，导频干扰消除器在形成去相关器输出向量之前，从接收的每个J多码信道的J信道码中取消接收的导频信号。

公开(公告)号：US6069883A

公开(公告)日：2000-05-30

申请号：US841980

申请日：1997-04-08

申请人： Richard Paul Ejzak ,  Subhasis Laha ,  Sarath Kumar ,  Douglas Knisely ,  Sanjiv Nanda ,  Chih-Lin I

发明人： Richard Paul Ejzak ,  Subhasis Laha ,  Sarath Kumar ,  Douglas Knisely ,  Sanjiv Nanda ,  Chih-Lin I

IPC分类号： H04J13/04 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W28/22 ,  H04W36/18 ,  H04W72/08 ,  H04W74/00 ,  H04J13/02

CPC分类号： H04W28/22 ,  H04B2201/70703 ,  H04W36/18 ,  H04W72/082

摘要： A code division multiple access system method and apparatus provides for allocation of increased bandwidth to a requesting mobile station. An access controller receives a data burst request (from either a requesting mobile station or from an external network already in connection with the mobile station) requesting a first data rate in excess of the basic data rate B allocated to a mobile station of a first cell. The access controller determines an increased data rate which is to be granted to said mobile station without causing excessive interference at said first cell and at least one adjacent cell and transmits a data burst assignment to a base station of said first cell indicating the increased data rate which has been granted to said mobile station. In another feature, the access controller processes a data burst request received from a mobile station involved in a soft handoff between multiple base stations and negotiates with those base stations for an increased data rate which may be granted to the requesting mobile station. One feature enables additional interactions to further refine the allocation process. A variety of system architectures are also described.

摘要翻译： 码分多址系统方法和装置提供增加带宽的分配给请求移动台。 访问控制器从请求的移动站或已经与移动站连接的外部网络接收请求超过分配给第一小区的移动站的基本数据速率B的第一数据速率的数据突发请求 。 访问控制器确定要被授予所述移动站的增加的数据速率，而不会在所述第一小区和至少一个相邻小区造成过多的干扰，并且向所述第一小区的基站发送指示增加的数据速率的数据突发分配 其被授予所述移动台。 在另一特征中，接入控制器处理从涉及多个基站之间的软切换的移动台接收到的数据突发请求，并与那些基站协商以增加可能被授权给请求移动台的数据速率。 一个功能可以实现其他交互以进一步完善分配过程。 还描述了各种系统架构。

公开(公告)号：US6067292A

公开(公告)日：2000-05-23

申请号：US841316

申请日：1997-04-30

申请人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Giovanni Vannucci

发明人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Giovanni Vannucci

IPC分类号： H04B1/707 ,  H04B7/26 ,  H04L7/00 ,  H04J13/00

CPC分类号： H04B1/7107 ,  H04B1/71072 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/712 ,  H04B2001/71077 ,  H04B2201/70701 ,  H04B2201/70709

摘要： A Code-Division Multiple Access (CDMA) receiver removes the pilot signal from the received signal. The pilot signal is defined by its multipath parameters (amplitudes, phase shift and delays) and its signature sequence. Since this information is known at the user's receiver terminal (i.e., handset), the pilot signals of the interfering multipath components of the baseband received signal are detected and removed prior to demodulation of the desired multipath component. The pilot signal may be cancelled prior to or following the data accumulation stage. The pilot signal cancellation can be switched on and off depending on the detected path signal level.

摘要翻译： 码分多址（CDMA）接收机从接收信号中去除导频信号。 导频信号由其多径参数（幅度，相移和延迟）及其签名序列定义。 由于该信息在用户的接收机终端（即，手机）处是已知的，所以在解调期望的多路径分量之前检测和去除基带接收信号的干扰多径分量的导频信号。 可以在数据累积阶段之前或之后取消导频信号。 导频信号消除可以根据检测到的路径信号电平进行接通和关断。

公开(公告)号：US5870378A

公开(公告)日：1999-02-09

申请号：US700262

申请日：1996-08-20

申请人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Charles Albert Webb, III

发明人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Charles Albert Webb, III

IPC分类号： H04B1/707 ,  H04B1/709 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/021 ,  H04B7/216

CPC分类号： H04B1/709 ,  H04B1/707 ,  H04J13/0048 ,  H04J13/10

摘要： A Multi-Code (MC) Code Division Multiple Access (CDMA) receiver receives N (where N.gtoreq.1) encoded signal channels over multiple air signal paths. The N signal channels are encoded using a properly chosen subset of Walsh codes based on a Walsh-Matrix, W.sup.M, where M is a power of two. In the disclosed MC-CDMA receiver, a timing correlator means recovers the timing and control signal for the N signal channels received over any particular signal path; a FWHT circuit together with a second correlator means decodes all of the N signal channels.

摘要翻译： 多码（MC）码分多址（CDMA）接收机在多个空中信号路径上接收N（其中N> / = 1）个编码信号信道。 使用基于Walsh-Matrix，WM的适当选择的沃尔什码的子集对N个信号信道进行编码，其中M是2的幂。 在公开的MC-CDMA接收机中，定时相关器装置恢复通过任何特定信号路径接收的N个信号信道的定时和控制信号; 与第二相关器一起的FWHT电路意味着解码所有N个信号信道。

公开(公告)号：US5734646A

公开(公告)日：1998-03-31

申请号：US539476

申请日：1995-10-05

申请人： Chih-Lin I ,  Sanjiv Nanda

发明人： Chih-Lin I ,  Sanjiv Nanda

IPC分类号： H04J13/04 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W28/22 ,  H04W36/18 ,  H04W72/08 ,  H04W74/00 ,  H04T13/00

CPC分类号： H04W28/22 ,  H04B2201/70703 ,  H04W36/18 ,  H04W72/082

摘要： A code division multiple access system provides a way of allocating an increased data rate to a requesting mobile station. A mobile station requesting a data rate in excess of the basic data rate sends received pilot strength data for its base station and base stations in adjacent cells. The received pilot strength data is used to determine an increased data rate to be assigned to the requesting mobile station. One feature assigns an increased data rate when the received pilot strength data has a predetermined relationship to an established threshold. Another feature utilizes a series of threshold levels, each pair of levels associated with a different permitted data rate. Using the received pilot strength data, a data rate is determined which satisfies all adjacent cell interference concerns. Another feature uses average adjacent cell capacity loads rather than threshold levels, together with the received pilot strength data, to determine the appropriate increased data rate to be assigned to a user requesting an increased data rate.

摘要翻译： 码分多址系统提供了一种将增加的数据速率分配给请求移动台的方式。 请求超过基本数据速率的数据速率的移动台将其基站和基站的接收导频强度数据发送到相邻小区。 所接收的导频强度数据用于确定要分配给请求移动台的增加的数据速率。 当接收的导频强度数据与已建立的阈值具有预定的关系时，一个特征分配增加的数据速率。 另一个特征使用一系列阈值级别，每对级别与不同的允许数据速率相关联。 使用接收到的导频强度数据，确定满足所有相邻小区干扰关系的数据速率。 另一个特征使用平均相邻小区容量负载而不是阈值水平以及接收到的导频强度数据来确定要分配给请求增加的数据速率的用户的适当增加的数据速率。

公开(公告)号：US5671218A

公开(公告)日：1997-09-23

申请号：US234757

申请日：1994-04-28

申请人： Chih-Lin I ,  Krishan Kumar Sabnani

发明人： Chih-Lin I ,  Krishan Kumar Sabnani

IPC分类号： H04B7/005 ,  H04B7/26 ,  H04J15/00 ,  H04W52/26 ,  H04W52/28 ,  H04B7/216 ,  H04J13/02

CPC分类号： H04W52/265 ,  H04W52/267 ,  H04W52/288

摘要： The invention relates to the use of CDMA techniques. Data signals to be transmitted from a plurality of wireless devices are spread across a common bandwidth. The data signals are received by a base station as a composite spread signal. The base station partially despreads the composite spread signal with unique codes to extract data signals from individual wireless devices. The data rate and quality of service requirements for each wireless device are used to calculate a power factor and a control signal is sent to control the power from a particular wireless device. In addition, a probability of transmission value is calculated based on an equivalent current load value and an equivalent population value. The probability of transmission value determines whether a particular wireless device is allowed access to an uplink frequency channel.

摘要翻译： 本发明涉及CDMA技术的应用。 要从多个无线设备发送的数据信号在公共带宽上扩展。 数据信号由基站作为复合扩展信号接收。 基站用独特的代码部分地解扩复合扩展信号，以从各个无线设备提取数据信号。 使用每个无线设备的数据速率和服务质量要求来计算功率因数，并且发送控制信号以控制来自特定无线设备的功率。 此外，基于等效电流负载值和等效总体值计算发送价值的概率。 传输值的概率确定特定的无线设备是否允许访问上行链路频道。