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：US06178329B1

公开(公告)日：2001-01-23

申请号：US08881625

申请日：1997-06-24

申请人： Pi-Hui Chao ,  Chih-Lin I

发明人： Pi-Hui Chao ,  Chih-Lin I

IPC分类号： H04Q730

CPC分类号： H04W16/10 ,  H04W16/12 ,  H04W28/16 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/0453 ,  H04W72/082 ,  H04W88/08 ,  H04W92/20

摘要： The present invention concerns the efficient use of the radio spectrum in wireless communications. Channel occupancy data and channel availability data concerning a specific base station and its neighbors are used to assign frequency channels to mobile units and/or base stations. The channel occupancy and availability data may be located at a base station or at a mobile switching center. Channels are preferably assigned as channel pairs.

摘要翻译： 本发明涉及无线电频谱在无线通信中的有效使用。 使用关于特定基站及其邻居的信道占用数据和信道可用性数据来向移动单元和/或基站分配频率信道。 信道占用和可用性数据可以位于基站或移动交换中心。 信道优选地被分配为信道对。

公开(公告)号：US6088335A

公开(公告)日：2000-07-11

申请号：US837588

申请日：1997-04-21

申请人： Chih-Lin I ,  Sarath Kumar ,  Sanjiv Nanda

发明人： Chih-Lin I ,  Sarath Kumar ,  Sanjiv Nanda

IPC分类号： H04J13/04 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W28/22 ,  H04W36/18 ,  H04W72/08 ,  H04W74/00 ,  H04B7/216

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 based on the difference in the maximum received received pilot strength data from a non-active base station (one not in connection with the mobile station) and the maximum received pilot strength data from an active base station (one in connection with the mobile station). Yet 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。 一个特征基于来自非活动基站（一个不与移动台连接的）的最大接收接收导频强度数据和来自活动基站的最大接收导频强度数据（一个 与移动台相关）。 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：US6055432A

公开(公告)日：2000-04-25

申请号：US911693

申请日：1997-08-15

申请人： Mohamed Abdul Haleem ,  Chih-Lin I

发明人： Mohamed Abdul Haleem ,  Chih-Lin I

IPC分类号： H04W16/10 ,  H04W16/14 ,  H04Q7/00

CPC分类号： H04W16/10 ,  H04W16/14 ,  H04W28/16

摘要： Co-Existence Dynamic Channel Assignment (DCA) techniques for overlay macrocellular systems facilitate the coexistence of embedded autonomous underlay microcellular (e.g., indoor) systems. The Co-existence of the two systems without excessive mutual interference is achieved through statistical systematic exclusion of predefined subsets of the universal channel set from the dynamic assignment to the overlay macrocells. The sets of channels are made available to the underlay systems. The exclusion is done with minimal DCA performance degradation.

摘要翻译： 用于覆盖宏蜂窝系统的共存动态信道分配（DCA）技术有助于嵌入式自主底层微蜂窝（例如，室内）系统的共存。 通过统计系统地排除从动态分配到覆盖宏小区的通用信道集的预定义子集，可以实现两个系统的共存，而没有过多的相互干扰。 这些通道可用于底层系统。 排除是以最小的DCA性能降级完成的。

公开(公告)号：US6047190A

公开(公告)日：2000-04-04

申请号：US911694

申请日：1997-08-15

申请人： Mohamed Abdul Haleem ,  Chih-Lin I

发明人： Mohamed Abdul Haleem ,  Chih-Lin I

IPC分类号： H04W16/10 ,  H04W16/14 ,  H04Q7/00

CPC分类号： H04W16/10 ,  H04W16/14 ,  H04W28/16

摘要： Co-Existence Dynamic Channel Assignment (DCA) techniques for overlay macrocellular systems facilitate the coexistence of embedded autonomous underlay microcellular (e.g., indoor) systems. The co-existence of the two systems without excessive mutual interference is achieved through systematic deterministic exclusion of predefined subsets of the universal channel set from the dynamic assignment to the overlay macrocells. The sets of channels are made available to the underlay systems. The exclusion is done with minimal DCA performance degradation. Multiple deterministic exclusions methods are described.

摘要翻译： 用于覆盖宏蜂窝系统的共存动态信道分配（DCA）技术有助于嵌入式自主底层微蜂窝（例如，室内）系统的共存。 通过从动态分配到覆盖宏小区的通用信道集的预定义子集的系统确定性排除，实现了没有过度相互干扰的两个系统的共存。 这些通道可用于底层系统。 排除是以最小的DCA性能降级完成的。 描述了多个确定性排除方法。

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：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.