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    Initial acquisition and frame synchronization in spread spectrum communication system
    81.
    发明授权
    Initial acquisition and frame synchronization in spread spectrum communication system 有权
    扩频通信系统中的初始采集和帧同步

    公开(公告)号：US06788732B2

    公开(公告)日：2004-09-07

    申请号：US10227496

    申请日：2002-08-21

    Applicant: Hi-Chan Moon

    Inventor： Hi-Chan Moon

    IPC: H04B169

    CPC classification number: H04J13/10 ,  H04B1/70758 ,  H04B7/2668 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J13/0048 ,  H04J13/12 ,  H04J13/16 ,  H04W56/0085 ,  H04W92/10

    Abstract: A device for rapidly performing initial acquisition and frame synchronization of a received signal for a receiver in a CDMA communication system. To this end, the base station multiplies a spreading sequence for a pilot channel by a synchronization pattern which maintains a pattern of inverting its sign in order to delineate the boundaries of the short sequence periods. A mobile station initially calculates the spreading sequence of the short period and the correlation value to perform initial acquisition, and despreads N-chip duration around a boundary of the one short spreading sequence period to detect the multiplied pattern, thereby acquiring synchronization of a data frame.

    Abstract translation: 一种用于在CDMA通信系统中快速执行接收机的接收信号的初始采集和帧同步的装置。 为此，基站通过保持反转其符号的模式的同步模式将导频信道的扩展序列相乘，以便描绘短序列周期的边界。 移动站首先计算短周期的扩展序列和相关值以执行初始采集，并且在一个短扩展序列周期的边界周围解扩N个码片持续时间，以检测相乘的模式，由此获取数据帧的同步 。

    CDMA transmitter and method generating combined high-rate and low-rate CDMA signals
    83.
    发明授权
    CDMA transmitter and method generating combined high-rate and low-rate CDMA signals 有权

    公开(公告)号：US06781980B1

    公开(公告)日：2004-08-24

    申请号：US09176922

    申请日：1998-10-22

    Applicant: Miguel Dajer ,  Peter K. LaConte ,  Harvey Rubin

    Inventor： Miguel Dajer ,  Peter K. LaConte ,  Harvey Rubin

    IPC: H04B7216

    CPC classification number: H04B1/0483 ,  H04B1/406 ,  H04B1/707 ,  H04B2201/70703

    Abstract: A wideband code division multiple access (CDMA) communication system overlayed on an IS-95 network generates two or more digital bit streams from a group of wideband digital data streams, each digital bit stream spread to form a CDMA component signal. Each CDMA component signal is combined with a corresponding IS-95 digital bit stream to form a composite CDMA signal, allowing a base station to share transmitter subsystems between the wideband and IS-95 systems. For up to three carrier frequencies, up to three composite CDMA signals are employed. A digital bit stream for a group of summed user conversations in the IS-95 system modulates a respective RF carrier frequency to generate a low-power RF signal. The CDMA component signals of the wideband CDMA system are generated so each has a chip rate identical to the chip rate of the digital bit streams of the IS-95 system. The baseband digital data streams for all wideband user conversations are summed digitally for each targeted RF carrier frequency to produce the composite wideband digital signal for each targeted frequency. In one application, each composite wideband digital signal, each at the IS-95 chip rate, is then used to modulate a carrier frequency which is either the same, or has approximately the same frequency and phase as the carrier frequency used in the IS-95 system. Three low-power RF signals are produced in the wideband system, each having the same spectral characteristics as the corresponding low-power RF signals generated in the IS-95 system. These low-power RF signals at the same frequency are combined into a single signal provided to the amplifier and antenna subsystem of a base station transmitter. In another application, each composite digital signal is digitally combined with a respective IS-95 digital bit stream prior to modulation by respective RF carrier. Therefore, signal combining between the IS-95 and wideband CDMA portions of a base station system is accomplished either digitally or with RF signals prior to amplification, thereby allowing the IS-95 system and wideband CDMA system portions of the base station to share RF filters, amplifiers and antennas of the base station transmitters.

    Base station for supporting communication rate modifications
    85.
    发明授权
    Base station for supporting communication rate modifications 有权
    用于支持通信速率修改的基站

    公开(公告)号：US06744781B2

    公开(公告)日：2004-06-01

    申请号：US10086666

    申请日：2002-02-28

    Applicant: Michael J. Luddy

    Inventor： Michael J. Luddy

    IPC: H04J316

    CPC classification number: H04W72/0406 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/708 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04L5/1446 ,  H04N1/00912 ,  H04N1/3333 ,  H04N2201/3335 ,  H04W28/20 ,  H04W72/087 ,  H04W76/10 ,  H04W88/12

    Abstract: A base station which prevents the transmission of data between communicating nodes until the data communication rate required by the communicating nodes has been established selectively suppresses the confirmation tone that a receiving node sends to an originating node. The transmission of voice, facsimile or modem data is prevented until the communication path has been established at the desired communication rate. This permits the base station to reliably transport encoded data at a plurality of data rates without precise synchronization.

    Abstract translation: 直到通信节点所要求的数据通信速率已被建立为止，阻止通信节点之间的数据传输的基站选择性地抑制接收节点向始发节点发送的确认音。 防止语音，传真或调制解调器数据的传输，直到通信路径以所需的通信速率建立。 这允许基站在没有精确同步的情况下以多个数据速率可靠地传送编码数据。

    DS/CDMA reverse link structure for high data rate transmission
    87.
    发明授权
    DS/CDMA reverse link structure for high data rate transmission 失效
    DS / CDMA反向链路结构，用于高数据速率传输

    公开(公告)号：US06735185B1

    公开(公告)日：2004-05-11

    申请号：US09731469

    申请日：2000-12-07

    Applicant: John Noneman

    Inventor： John Noneman

    IPC: H04B7216

    CPC classification number: H04L1/0059 ,  H04B2201/70703 ,  H04J13/102 ,  H04L1/0001 ,  H04L1/0071 ,  H04L1/08

    Abstract: Increased data rate transmission in the reverse traffic channel is obtained by modifying a core reverse CDMA traffic channel signal generator and modulator by creating a plurality of parallel pathways, each of which includes a Walsh modulator and a modulo-2 adder which direct-sequence spreads the modulated data using one of a plurality of modified long codes. The DS-spread data signals from each of the parallel pathways are summed and split to the I and Q channels for PN code spreading. The long code variations are obtained by varying one or more bits of the IS-95 standard public long code mask or private long code mask, specifically, one or more bits of the most significant bit (MSB) string of the public long code mask (bits M41 through M32). Generally, each variable bit provides two possible code channels—one Fundamental Code Channel and 2b−1 Supplemental Code Channels, where b is the number of bits that can be varied within the long code mask. In another embodiment, a multiplexer may be inserted into a core reverse channel sequence prior the PN spreading function to provide dual channel OQPSK that is consistent with existing IS-95 single channel OQPSK. Different levels of service can be selected using different codes and a plurality of multiplexers located in the error detection and encoding front end of the core reverse channel process sequence.

    Abstract translation: 通过创建多个并行路径来修改核心反向CDMA业务信道信号发生器和调制器来获得反向业务信道中增加的数据速率传输，每个并行路径包括沃尔什调制器和模2加法器，直接序列扩展 使用多个修改的长码之一调制数据。 来自每个并行路径的DS扩展的数据信号被相加并分割成用于PN码扩展的I和Q信道。 长码变化通过改变IS-95标准公共长码掩码或专用长码掩码的一个或多个比特来获得，特别是公共长码掩码的最高有效位（MSB）字符串的一个或多个比特 位M41至M32）。 通常，每个可变位提供两个可能的代码通道 - 一个基本代码通道和2个b个补充代码通道，其中b是可以在长代码掩码内变化的位数。 在另一个实施例中，多路复用器可以在PN扩展功能之前插入到核心反向信道序列中，以提供与现有的IS-95单信道OQPSK一致的双信道OQPSK。 可以使用位于核心反向信道处理序列的错误检测和编码前端中的不同代码和多个多路复用器来选择不同级别的服务。

    Apparatus and method for joint detection receiving irrespective of orthogonal code length in mobile communication system
    89.
    发明申请
    Apparatus and method for joint detection receiving irrespective of orthogonal code length in mobile communication system 失效
    用于联合检测接收的装置和方法，不论移动通信系统中的正交码长度如何

    公开(公告)号：US20040052236A1

    公开(公告)日：2004-03-18

    申请号：US10657669

    申请日：2003-09-08

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Sung-Oh Hwang ,  Ping Wang ,  Gang Liu ,  Tao Fan ,  Hye-Young Lee ,  Jin-Weon Chang ,  Hyeon-Woo Lee ,  Chunhua Wang

    IPC: H04B007/216 ,  H04B007/212

    CPC classification number: H04B1/71052 ,  H04B2201/70703

    Abstract: A joint detection reception apparatus and method, which are utilized irrespective of a length of an orthogonal code in a TD-CDMA communication system. The joint detection reception method for creating a system matrix associated with a joint detection receiver in the same time slot includes the steps of a) repeating and partitioning individual channelization codes having variable lengths, and creating channelization code blocks having the same lengths, b) performing a convolution operation between the repeated and partitioned channelization code blocks and a channel impulse response, and acquiring combined impulse responses, c) grouping the combined impulse responses to construct sub-block matrices for a joint detection system, d) arranging the sub-block matrices for the joint detection system to be shifted by a predetermined column distance, and constructing a joint detection system matrix, and e) extending the joint detection system matrix to a squared-format matrix to create a block-circulant squared matrix.

    Abstract translation: 无论TD-CDMA通信系统中的正交码的长度如何，都使用联合检测接收装置和方法。 用于在相同时隙中创建与联合检测接收机相关联的系统矩阵的联合检测接收方法包括以下步骤：a）重复和分割具有可变长度的各个信道化码，并创建具有相同长度的信道化码块，b）执行 重复和分割的信道化码块之间的卷积运算和信道脉冲响应，以及获取组合脉冲响应，c）将组合的脉冲响应分组以构建用于联合检测系统的子块矩阵; d）将子块矩阵 用于使联合检测系统偏移预定列距离，以及构建联合检测系统矩阵，以及e）将联合检测系统矩阵扩展为平方格式矩阵以创建块循环平方矩阵。

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