公开(公告)号：US06760361B2

公开(公告)日：2004-07-06

申请号：US09742714

申请日：2000-12-20

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

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

IPC: H04L2732

CPC classification number: H04B1/7083 ,  H04J13/107 ,  H04L7/043

Abstract: 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.

Abstract translation: 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

Applicant: Yi-Pin Eric Wang

Inventor： Yi-Pin Eric Wang

IPC: H04B7212

CPC classification number: H04W74/0866 ,  H04W4/14

Abstract: 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.

Abstract translation: 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

Applicant: Yi-Pin Eric Wang ,  Ali Khayrallah

Inventor： Yi-Pin Eric Wang ,  Ali Khayrallah

IPC: H04B1713

CPC classification number: H04B1/7103 ,  H04J11/0023 ,  H04J13/0048

Abstract: 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.

Abstract translation: 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

Applicant: Yi-Pin Eric Wang

Inventor： Yi-Pin Eric Wang

IPC: H04L2730

CPC classification number: H04B1/7075 ,  H04B1/70754 ,  H04B1/7093 ,  H04B1/7097 ,  H04B1/7115

Abstract: 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.

Abstract translation: 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

Applicant: Yi-Pin Eric Wang ,  Wayne Stark

Inventor： Yi-Pin Eric Wang ,  Wayne Stark

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

CPC classification number: H04B7/18532

Abstract: 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.

Abstract translation: 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

Applicant: Karim Jamal ,  Riaz Esmailzadeh ,  Yi-Pin Eric Wang

Inventor： Karim Jamal ,  Riaz Esmailzadeh ,  Yi-Pin Eric Wang

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

CPC classification number: H04B1/70752 ,  H04B1/70735 ,  H04B1/7083 ,  H04B2201/70701

Abstract: 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.

Abstract translation: 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：US09253783B2

公开(公告)日：2016-02-02

申请号：US13403683

申请日：2012-02-23

Applicant: Yi-Pin Eric Wang ,  Anders Wallén ,  Stephen Grant

Inventor： Yi-Pin Eric Wang ,  Anders Wallén ,  Stephen Grant

IPC: H04W72/04

CPC classification number: H04W72/0486 ,  H04W72/0453

Abstract: The method an apparatus described herein manages uplink resources to increase spectral efficiency and system capacity. According to one embodiment of the present invention, a base station may be assigned two or more downlink carriers for downlink transmission and two or more corresponding uplink carriers. In a multi-carrier mode, the base station may transmit signals on two or more downlink carriers to the same mobile terminal, and receive signals from the mobile terminal on one of the paired uplink terminals. The uplink carriers can be operated at different interference levels and the uplink traffic can be divided between the available uplink carriers based on the type of traffic and/or data transmission parameters. The mobile terminals may also be allowed to switch between the uplink carriers to improve overall efficiency.

Abstract translation: 本文描述的装置的方法管理上行链路资源以提高频谱效率和系统容量。 根据本发明的一个实施例，可以为基站分配用于下行链路传输的两个或更多个下行链路载波和两个或更多个对应的上行链路载波。 在多载波模式中，基站可以在两个或多个下行链路载波上发送信号到同一个移动终端，并且在一个上行链路终端中的一个上接收来自移动终端的信号。 上行链路载波可以以不同的干扰级别操作，并且可以基于业务类型和/或数据传输参数在可用的上行链路载波之间划分上行链路业务。 还可以允许移动终端在上行链路载波之间切换以提高整体效率。

公开(公告)号：US08761323B2

公开(公告)日：2014-06-24

申请号：US13333478

申请日：2011-12-21

Applicant: Yi-Pin Eric Wang ,  Gregory Bottomley ,  Jung-Fu Cheng ,  Stephen Grant ,  Ning He ,  Niklas Johansson ,  Cagatay Konuskan

Inventor： Yi-Pin Eric Wang ,  Gregory Bottomley ,  Jung-Fu Cheng ,  Stephen Grant ,  Ning He ,  Niklas Johansson ,  Cagatay Konuskan

IPC: H04B1/10

CPC classification number: H04W72/1278 ,  H04B1/71075 ,  H04B1/712 ,  H04W72/082

Abstract: In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. After each stage of interference cancellation, interference characteristics change. An adaptive strategy is used in which after each stage of interference cancellation, impairment covariance is parametrically updated and combining weights of the receiver are adapted to reflect the updated impairment covariance.

Abstract translation: 在无线网络的接收节点中，使用迭代多用户多级干扰消除接收机。 在干扰消除的每个阶段之后，干扰特性发生变化。 使用自适应策略，其中在干扰消除的每个阶段之后，对损伤协方差进行参数更新，并且接收机的组合权重被适配以反映更新的损害协方差。

公开(公告)号：US08743987B2

公开(公告)日：2014-06-03

申请号：US13050210

申请日：2011-03-17

Applicant: Yi-Pin Eric Wang

Inventor： Yi-Pin Eric Wang

IPC: H04L27/06 ,  H04L27/01 ,  H04B1/10

CPC classification number: H04L25/08 ,  H04L25/03012 ,  H04L25/03159 ,  H04L25/03171 ,  H04L25/03184 ,  H04L25/03312 ,  H04L25/03331 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: A receiver is configured to perform symbol detection based on a total frequency domain received signal that comprises contribution from a block of time domain symbols. The receiver comprises electronic circuitry operate to divide the block into plural sub-blocks, and for each sub-block, to jointly detect the symbols of the sub-block while treating symbols of the block which are outside of the sub-block as noise.

Abstract translation: 接收机被配置为基于包括来自时域符号块的贡献的总频域接收信号执行符号检测。 接收机包括电子电路，用于将块划分为多个子块，并且对于每个子块，共同检测子块的符号，同时将处于子块外部的块的符号作为噪声进行处理。

公开(公告)号：US08724741B2

公开(公告)日：2014-05-13

申请号：US12572680

申请日：2009-10-02

Applicant: Gregory E. Bottomley ,  Yi-Pin Eric Wang

Inventor： Gregory E. Bottomley ,  Yi-Pin Eric Wang

IPC: H04L27/00 ,  H04L27/06 ,  H03D1/06

CPC classification number: H04B17/309 ,  H04B17/26 ,  H04L2025/03426

Abstract: The quality of a received signal in a non-linear receiver is estimated using a coupling matrix G or Q that describes the interaction of symbols in the received signal with other symbols and/or how the impairment (noise and interference) interacts in the received signal. The coupling matrix is also useful for joint detection. The signal quality estimate may include, e.g., the minimum eigenvalue, and other functions, such as the determinant and trace of the coupling matrix. When G or Q varies with each block, as in CDMA systems employing longcode scrambling, a representative matrix can be used, such as a matrix of RMS values or average magnitudes of real and imaginary components. The signal quality estimate can be expressed as a bit error rate (BER).

Abstract translation: 使用描述接收信号中的符号与其他符号的相互作用和/或接收信号中的损害（噪声和干扰）如何相互作用的耦合矩阵G或Q来估计非线性接收机中的接收信号的质量 。 耦合矩阵对于联合检测也是有用的。 信号质量估计可以包括例如最小特征值和其他函数，诸如耦合矩阵的行列式和轨迹。 当G或Q随每个块变化时，如在使用长码扰码的CDMA系统中，可以使用代表性矩阵，例如RMS值矩阵或实部和虚部分量的平均幅度。 信号质量估计可以表示为误码率（BER）。