公开(公告)号：US20080130719A1

公开(公告)日：2008-06-05

申请号：US11566756

申请日：2006-12-05

申请人： Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Stephen J. Grant

发明人： Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Stephen J. Grant

IPC分类号： H04B1/707

CPC分类号： H04B1/712

摘要： Processing in a baseband processor is improved by estimating channelization code powers when processing received signals and reducing at least one of interference and noise power from the code power estimates. According to one embodiment of a wireless communication device such as a mobile phone or Local Area Network (LAN) adapter, the device comprises circuitry configured to receive a composite signal having contributions from a signal of interest and one or more interfering signals and a baseband processor. The baseband processor is configured to estimate channelization code powers for a channelization code associated with the signal of interest and one or more channelization codes associated with the one or more interfering signals. The baseband processor is also configured to reduce at least one of interference and noise power from the channelization code power estimates.

摘要翻译： 通过在处理接收到的信号时估计信道化码功率并且从代码功率估计中减少干扰和噪声功率中的至少一个来改善基带处理器中的处理。 根据诸如移动电话或局域网（LAN）适配器的无线通信设备的一个实施例，该设备包括被配置为接收具有来自感兴趣的信号和一个或多个干扰信号的贡献的复合信号的电路和基带处理器 。 基带处理器被配置为估计与感兴趣的信号相关联的信道化码和与一个或多个干扰信号相关联的一个或多个信道化码的信道化码功率。 基带处理器还被配置为从信道化码功率估计中减少干扰和噪声功率中的至少一个。

公开(公告)号：US20070189363A1

公开(公告)日：2007-08-16

申请号：US11276069

申请日：2006-02-13

申请人： Hakan Bengt Eriksson ,  Carmela Cozzo ,  Ali S. Khayrallah ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

发明人： Hakan Bengt Eriksson ,  Carmela Cozzo ,  Ali S. Khayrallah ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

IPC分类号： H04B1/00

CPC分类号： H04B1/712 ,  H04B1/71052 ,  H04B1/711 ,  H04B2201/709727

摘要： The computational complexity required for interference suppression in the reception of wireless communications from multiple users is reduced by sharing information among the users. In some situations, information indicative of a statistical characteristic of the interference is shared among the users. Delays used to produce the interference statistic information are determined based on rake finger delays employed by the users. In some situations, a parameter estimate that is used to calculate combining weights for the users is shared among the users.

摘要翻译： 通过在用户之间共享信息来减少在多个用户的无线通信的接收中的干扰抑制所需的计算复杂度。 在某些情况下，用户之间共享指示干扰的统计特性的信息。 用于产生干扰统计信息的延迟是基于用户使用的耙指延迟来确定的。 在某些情况下，用户之间共享用于计算用户组合权重的参数估计。

公开(公告)号：US07221958B2

公开(公告)日：2007-05-22

申请号：US10021378

申请日：2001-12-12

申请人： Tracy L. Fulghum ,  William O. Camp, Jr. ,  Rajaram Ramesh ,  Yi-Pin Eric Wang

发明人： Tracy L. Fulghum ,  William O. Camp, Jr. ,  Rajaram Ramesh ,  Yi-Pin Eric Wang

IPC分类号： H04M1/00

CPC分类号： H03H17/0225

摘要： A delay-and-add filtering technique positions one or more filter nulls substantially at points of narrowband interference in a relatively wideband received signal. For example, the technique is useful in removing adjacent channel interference in a received W-CDMA signal caused GSM radio transmissions.

摘要翻译： 延迟和加法滤波技术基本上在相对宽带接收信号中的窄带干扰点处定位一个或多个滤波器零点。 例如，该技术在去除所接收到的W-CDMA信号造成的GSM无线电传输中的相邻信道干扰方面是有用的。

公开(公告)号：US06760361B2

公开(公告)日：2004-07-06

申请号：US09742714

申请日：2000-12-20

申请人： Per Johan Anders Nyström ,  Karim Jamal ,  Riaz Esmailzadeh ,  Yi-Pin Eric Wang

发明人： Per Johan Anders Nyström ,  Karim Jamal ,  Riaz Esmailzadeh ,  Yi-Pin Eric Wang

IPC分类号： H04L2732

CPC分类号： H04B1/7083 ,  H04J13/107 ,  H04L7/043

摘要： A special coding scheme is disclosed for more effectively acquiring a long code and frame timing during a cell search in a CDMA communications system. A code set of length M Q-ary code words including symbols from a set of Q short codes is defined with certain properties. The primary property to be satisfied is that no cyclic shift of a code word yields a valid code word. The other properties to be satisfied are that there is a one-to-one mapping between a long code message and a valid code word, and a decoder should be able to find both the random shift (thereby implicitly finding the frame timing) and the transmitted code word (i.e., its associated long code indication message) in the presence of interference and noise, with some degree of accuracy and reasonable complexity.

摘要翻译： 公开了一种特殊的编码方案，用于在CDMA通信系统中的小区搜索期间更有效地获取长码和帧定时。 使用某些属性来定义包括来自一组Q短码的符号的长度为M个Q字节码字的码组。 要满足的主要特征是代码字的循环移位不产生有效的代码字。 要满足的其他属性是在长码消息和有效码字之间存在一对一的映射，并且解码器应该能够找到随机移位（从而隐含地找到帧定时）和 在存在干扰和噪声的情况下，传输码字（即其相关联的长码指示消息）具有一定程度的准确性和合理的复杂度。

公开(公告)号：US06606309B1

公开(公告)日：2003-08-12

申请号：US08752020

申请日：1996-11-19

申请人： Yi-Pin Eric Wang

发明人： Yi-Pin Eric Wang

IPC分类号： H04B7212

CPC分类号： H04W74/0866 ,  H04W4/14

摘要： Access requests are communicated from a plurality of radiotelephones to a central station over a random access channel carrier frequency band during a first RACH message time window. Short message acknowledgements are communicated from the plurality of radiotelephones to the central station over the random access channel carrier frequency band during a second RACH message time window, in response to short messages communicated from the central station to the plurality of radiotelephones. Preferably, the first RACH message time window includes a first set of TDMA time slots in a group of TDMA control channel multiframes, and the second RACH message time window includes a second set of TDMA time slots in the group of TDMA control channel multiframes, thereby forming a RACH multiframe. Preferably, the first and second RACH message time windows are separated by a guard time. A radiotelephone communications signal representing a short message acknowledgement encoded according to a predetermined short message code, preferably previously communicated to a radiotelephone in a short message from the central station, may be transmitted from the radiotelephone. The radiotelephone communications signal is received at the central station and decoded according to the predetermined short message code to thereby recover a short message acknowledgement. The plurality of radiotelephones may be arranged into paging groups, each having a unique short message code assigned thereto, and a limited number of short message including the unique short message code may be communicated during a given RACH multiframe.

摘要翻译： 在第一RACH消息时间窗口期间，接入请求通过随机接入信道载波频带从多个无线电话机传送到中心站。 响应于从中心站传送到多个无线电话的短消息，短消息确认在第二RACH消息时间窗口期间通过随机接入信道载波频带从多个无线电话机传送到中心站。 优选地，第一RACH消息时间窗口包括一组TDMA控制信道多帧中的第一组TDMA时隙，并且第二RACH消息时间窗口包括TDMA控制信道多帧中的第二组TDMA时隙，从而 形成RACH多帧。 优选地，第一和第二RACH消息时间窗口被保护时间分隔开。 可以从无线电话机发送表示根据预定的短消息代码编码的短消息确认的无线电话通信信号，优选地从中央站在短消息中预先传送到无线电话机。 无线电话通信信号在中央站接收并根据预定的短消息码进行解码，从而恢复短消息确认。 多个无线电话机可以被布置成寻呼组，每个寻呼组具有分配给其的唯一的短消息代码，并且可以在给定的RACH复帧期间传送包括唯一短消息代码的有限数量的短消息。

公开(公告)号：US06501788B1

公开(公告)日：2002-12-31

申请号：US09235470

申请日：1999-01-22

申请人： Yi-Pin Eric Wang ,  Ali Khayrallah

发明人： Yi-Pin Eric Wang ,  Ali Khayrallah

IPC分类号： H04B1713

CPC分类号： H04B1/7103 ,  H04J11/0023 ,  H04J13/0048

摘要： A symbol is transmitted in a communications medium according to a first spreading sequence of a set of spreading sequences, for example, CDMA channelization codes, which may be used to transmit symbols in the system. A communications signal is received from the communications medium, for example, at a mobile terminal. The received communications signal is resolved into a plurality of multipath signal components by, for example, descrambling the received signal according to a cell-specific scrambling code. The resolved plurality of signal components is correlated with the set of spreading sequences to generate a respective set of correlations for a respective one of the resolved signal components, a respective one of the sets of correlations including a respective correlation of a resolved signal component with the first spreading sequence. An interference component associated with a second spreading sequence of the set of spreading sequences, identified based on the correlations of the resolved signal components with the set of possible spreading sequences, is cancelled from the correlations of the plurality of resolved signal components with the first spreading sequence, thus generating a set of interference-cancelled correlations of the resolved signal components with the first spreading sequence. The transmitted symbol is estimated from the set of interference-cancelled correlations. Preferably, the set of spreading sequences is orthogonal. More preferably, the set of spreading sequences comprises a Hadamard code, and the correlations of the set of possible spreading sequences with the resolved signal components is generated using a fast Hadamard transform.

摘要翻译： 符号在通信介质中根据一组扩频序列的第一扩展序列发送，例如CDMA信道化码，可用于在系统中发送符号。 从通信介质接收通信信号，例如在移动终端处。 接收到的通信信号通过例如根据小区特定的扰频对所接收的信号进行解扰，将其解析成多个多径信号分量。 解析的多个信号分量与扩展序列的集合相关，以产生分辨的信号分量中的相应一个的相应的相关集合，相关组中的相应一个包括分辨的信号分量与 第一个扩展序列。 与基于解析的信号分量与可能扩展序列的集合的相关性识别的扩展序列集合的第二扩展序列相关联的干扰分量从多个解析的信号分量与第一扩展的相关性中消除 从而产生解析的信号分量与第一扩展序列的一组干扰消除相关性。 从干扰消除相关的集合估计发送符号。 优选地，扩展序列的集合是正交的。 更优选地，该组扩展序列包括Hadamard码，并且使用快速Hadamard变换来生成可能的扩展序列集合与解析的信号分量的相关性。

公开(公告)号：US06404758B1

公开(公告)日：2002-06-11

申请号：US09294644

申请日：1999-04-19

申请人： Yi-Pin Eric Wang

发明人： Yi-Pin Eric Wang

IPC分类号： H04L2730

CPC分类号： H04B1/7075 ,  H04B1/70754 ,  H04B1/7093 ,  H04B1/7097 ,  H04B1/7115

摘要： A system and method are provided for achieving slot synchronization in a Wideband CDMA system in the presence of large initial frequency errors. A FSC matched filter having a reduced coherence window is provided for reducing degradation of a symbol due to carrier phase rotation resulting from oscillator error, thereby preventing severe loss of signal energy at the peaks of the FSC matched filter output. Additionally, a circular sliding integrator is provided to combine the accumulated disbursed signal energies due to the oscillator error and multipath interference, thereby allowing easier identification of the time index representing the time slot boundary. Further, a sorter is provided for determining a predetermined number of time index candidates representing the time slot boundary, thereby increasing the possibility that the true time index boundary is sent to the second stage of synchronization.

摘要翻译： 提供一种用于在存在大的初始频率误差的情况下在宽带CDMA系统中实现时隙同步的系统和方法。 提供了具有减小的相干窗口的FSC匹配滤波器，用于减少由于振荡器误差引起的载波相位旋转引起的符号劣化，从而防止FSC匹配滤波器输出峰值处的信号能量严重丧失。 此外，提供圆形滑动积分器以由于振荡器误差和多径干扰而组合累积的分支信号能量，从而允许更容易地识别表示时隙边界的时间指标。 此外，提供了一种分类器，用于确定表示时隙边界的预定数量的时间索引候选，从而增加了将真实时间索引边界发送到第二阶段同步的可能性。

公开(公告)号：US6072786A

公开(公告)日：2000-06-06

申请号：US874047

申请日：1997-06-12

申请人： Yi-Pin Eric Wang ,  Wayne Stark

发明人： Yi-Pin Eric Wang ,  Wayne Stark

IPC分类号： H04B7/185 ,  H04B7/208 ,  H04B7/19 ,  H04B7/212

CPC分类号： H04B7/18532

摘要： A method for acquiring a spotbeam beacon frequency is disclosed. The method comprises a fast synchronization procedure wherein the beacon frequency of the spotbeam is first acquired using a carrier acquisition process. A coarse time acquisition procedure is then performed on the acquired beacon frequency followed by a performance of a fine time and frequency acquisition process. The entire process enables spotbeam beacon acquisition in a range of approximately 2.7-27 seconds.

摘要翻译： 公开了一种获取光束信标频率的方法。 该方法包括快速同步过程，其中首先使用载波获取过程获取光束的信标频率。 然后对所获取的信标频率执行粗略的时间获取过程，随后执行精细的时间和频率获取过程。 整个过程使得能够在大约2.7-27秒的范围内进行光束信标采集。

公开(公告)号：US5930366A

公开(公告)日：1999-07-27

申请号：US921135

申请日：1997-08-29

申请人： Karim Jamal ,  Riaz Esmailzadeh ,  Yi-Pin Eric Wang

发明人： Karim Jamal ,  Riaz Esmailzadeh ,  Yi-Pin Eric Wang

IPC分类号： H04B1/7073 ,  H04B1/7075 ,  H04B1/7083 ,  H04B7/26 ,  H04Q7/38 ,  H04L9/00

CPC分类号： H04B1/70752 ,  H04B1/70735 ,  H04B1/7083 ,  H04B2201/70701

摘要： Each transmission frame within a spread spectrum communications system relating to synchronization code transmission is divided into a plurality of slots. Each of the slots includes a primary (pilot) code c.sub.p and a secondary (combined) code c.sub.s/lci that includes information identifying or indicative of both a frame timing and a scrambling code for synchronization. This information concerning frame timing and scrambling code may be encoded in the combined code c.sub.s/lci itself, as well as in the modulation values of the sequences of plural combined codes within a frame. Alternatively, the information is encoded in the sequence of plural combined codes c.sub.s/lci transmitted in each frame, as well as in the modulated values of the sequences of plural combined codes within a frame. As yet another alternative, the information is encoded in the timing of the combined code c.sub.s/lci transmission within each slot of the frame relative to its associated primary code c.sub.p.

摘要翻译： 与同步码传输相关的扩频通信系统内的每个传输帧被划分成多个时隙。 每个时隙包括主（代码）代码+ E，ovs c + EE p和辅助（组合）代码+ E，ovs c + EE s / lci，其包括识别或指示帧定时和加扰 同步代码 关于帧定时和扰码的信息可以以组合码+ E，ovs c + EE s / lci本身以及帧内的多个组合码的序列的调制值进行编码。 或者，信息按照在每帧中发送的多个组合码+ E，ovs + EE s / lci的序列以及帧内的多个组合码的序列的调制值进行编码。 作为另一个替代方案，信息在帧相对于其相关联的主代码+ E，ovs c + EE p的每个时隙内的组合代码+ E，ovs c + EE s / lci传输的定时编码。

公开(公告)号：US20150139004A1

公开(公告)日：2015-05-21

申请号：US14402475

申请日：2012-05-22

申请人： Gábor Fodor ,  Muhammad Kazmi ,  Yi-Pin Eric Wang

发明人： Gábor Fodor ,  Muhammad Kazmi ,  Yi-Pin Eric Wang

IPC分类号： H04L5/00 ,  H04W24/08 ,  H04L5/14

CPC分类号： H04L5/0062 ,  H04J11/0036 ,  H04L5/14 ,  H04W24/08 ,  H04W72/0406 ,  H04W72/082

摘要： A method in a network node for assisting a first user equipment in interference mitigation. The network node is comprised in a cellular communications network. The cellular communications network further comprises the first user equipment and a second user equipment. The second user equipment causes interference to the first user equipment when at least one of the first user equipment and second user equipment communicate by using Device-to-Device communication. The network node obtains information about the receiver of the first user equipment. The network node then determines one or more parameters required by the first user equipment for mitigating the interference. The parameters relate to the obtained information and to the interfering second user equipment. The network node then sends the one or more parameters to the first user equipment thereby assisting the first user equipment to mitigate interference caused by the second user equipment.

摘要翻译： 网络节点中用于辅助第一用户设备进行干扰减轻的方法。 网络节点包括在蜂窝通信网络中。 蜂窝通信网络还包括第一用户设备和第二用户设备。 当第一用户设备和第二用户设备中的至少一个通过使用设备到设备通信进行通信时，第二用户设备对第一用户设备造成干扰。 网络节点获取关于第一用户设备的接收者的信息。 网络节点然后确定第一用户设备所需的一个或多个参数以减轻干扰。 这些参数与获得的信息和干扰的第二用户设备有关。 网络节点然后将一个或多个参数发送到第一用户设备，从而辅助第一用户设备减轻由第二用户设备引起的干扰。