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    Multiple path delay time searcher in reverse link communication channel of a communication system employing a code division multiple access method
    62.
    发明授权
    Multiple path delay time searcher in reverse link communication channel of a communication system employing a code division multiple access method 失效
    采用码分多址方式的通信系统的反向链路通信信道中的多路径延迟时间搜索器

    公开(公告)号：US5784364A

    公开(公告)日：1998-07-21

    申请号：US668237

    申请日：1996-06-21

    Applicant: Jae-Min Ahn ,  Young-Ky Kim ,  Chun-Young Seo

    Inventor： Jae-Min Ahn ,  Young-Ky Kim ,  Chun-Young Seo

    IPC: H04B7/216 ,  H04B1/7075 ,  H04B1/7115

    CPC classification number: H04B1/7075 ,  H04B1/7115

    Abstract: A multiple path delay time searcher at a signal demodulation mode of a reverse link communication channel of a mobile communication system employing a code division multiple access method. The multiple path delay time searcher includes a sample buffer for storing a signal received from an antenna of a base station as a sample; a delay time searcher for obtaining a correlation value between a signal at a specific search location designated by the sample buffer and a reference signal corresponding to a specific symbol; a signal processor for deciding whether there is a signal component in the specific search location using an accumulative average of the correlation values received from the delay time searcher; and a multiple path combiner for deciding the symbol designated in the delay time searcher.

    Abstract translation: 在采用码分多址方式的移动通信系统的反向链路通信信道的信号解调模式下的多路径延迟时间搜索器。 多路径延迟时间搜索器包括用于存储从基站的天线接收的信号作为样本的采样缓冲器; 延迟时间搜索器，用于获得由采样缓冲器指定的特定搜索位置处的信号与对应于特定符号的参考信号之间的相关值; 信号处理器，用于使用从延迟时间搜索器接收到的相关值的累积平均来确定特定搜索位置中是否存在信号分量; 以及用于确定延迟时间搜索器中指定的符号的多路径组合器。

    Sliding correlator used in CDMA systems to establish initial synchronization
    63.
    发明授权
    Sliding correlator used in CDMA systems to establish initial synchronization 失效
    CDMA系统中使用的滑动相关器建立初始同步

    公开(公告)号：US5768306A

    公开(公告)日：1998-06-16

    申请号：US906133

    申请日：1997-07-25

    Applicant: Mamoru Sawahashi ,  Fumiyuki Adachi

    Inventor： Mamoru Sawahashi ,  Fumiyuki Adachi

    IPC: H04B1/7075 ,  H04B1/7095 ,  H04B1/707

    CPC classification number: H04B1/7075 ,  H04B1/7095

    Abstract: A sliding correlator is disclosed for establishing initial synchronization to spectrum-despread a received signal into a narrow band signal in a radio receiver in a spread spectrum CDMA system. The a sliding correlator can achieve high speed synchronization. A received signal is stored in a memory circuit (43). The received signal is read from the memory circuit (43) at a frequency substantially higher than the storing rate of the received signal. The read received signal is multiplied by a replica of a spreading code sequence by means of a multiplier (45), and the output signal of the multiplier (45) is accumulated by an accumulator (46) over a predetermined time period. The output of the accumulator (46) is decided by a threshold detector (47) whether or not it exceeds a predetermined threshold. When the output of the threshold detector (47) is less than the threshold, the phase of the spreading code sequence is shifted, and the detection is repeated. Since the correlation is taken by reading the received signal from the memory circuit (43) at a high speed, the initial synchronization can be established quickly.

    Abstract translation: 公开了一种用于建立初始同步的滑动相关器，以在扩频CDMA系统中的无线电接收机中将接收信号频谱扩展成窄带信号。 滑动相关器可实现高速同步。 接收到的信号被存储在存储器电路（43）中。 接收到的信号以比接收信号的存储速率大得多的频率从存储器电路（43）读出。 读取的接收信号通过乘法器（45）与扩展码序列的副本相乘，乘法器（45）的输出信号由累加器（46）在预定时间段内累积。 累加器（46）的输出由阈值检测器（47）确定，无论其是否超过预定阈值。 当阈值检测器（47）的输出小于阈值时，扩展码序列的相位被移位，并且重复检测。 由于通过从存储器电路（43）高速读出接收信号来进行相关，所以可以快速建立初始同步。

    Parallel packetized intermodule arbitrated high speed control and data bus
    64.
    发明授权
    Parallel packetized intermodule arbitrated high speed control and data bus 失效
    并行打包模块仲裁高速控制和数据总线

    公开(公告)号：US5754803A

    公开(公告)日：1998-05-19

    申请号：US671221

    申请日：1996-06-27

    Applicant: Robert T. Regis

    Inventor： Robert T. Regis

    IPC: G06F13/376 ,  G06F13/374 ,  H04B1/7075 ,  H04B1/708 ,  G06F13/36

    CPC classification number: H04B1/7075 ,  G06F13/374 ,  G06F13/376 ,  H04B1/70753 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/708 ,  H04B2201/70702

    Abstract: A parallel packetized intermodule arbitrated high speed control data bus system which allows high speed communications between microprocessor modules in a more complex digital processing environment. The system features a simplified hardware architecture featuring fast FIFO queuing operating at 12.5 MHz, TTL CMOS compatible level clocking signals, single bus master arbitration, synchronous clocking, DMA, and unique module addressing for multiprocessor systems. The system includes a parallel data bus with sharing bus masters residing on each processing module decreeing the communication and data transfer protocols. Bus arbitration is performed over a dedicated serial arbitration line and each requesting module competes for access to the parallel data bus by placing the address of the requesting module on the arbitration line and monitoring the arbitration line for collisions.

    Abstract translation: 并行分组式串联仲裁高速控制数据总线系统，允许在更复杂的数字处理环境中的微处理器模块之间进行高速通信。 该系统具有简化的硬件体系结构，具有12.5 MHz快速FIFO排队，TTL CMOS兼容级别时钟信号，单总线主仲裁，同步时钟，DMA和多处理器系统的独特模块寻址。 该系统包括并行数据总线，共享总线主机驻留在每个处理模块上，判定通信和数据传输协议。 总线仲裁通过专用串行仲裁线执行，并且每个请求模块通过将请求模块的地址放置在仲裁线上并监视仲裁线路进行冲突来竞争对并行数据总线的访问。

    Receiver in a direct-sequence spread-spectrum communication system using a window filter
    66.
    发明授权
    Receiver in a direct-sequence spread-spectrum communication system using a window filter 失效
    在使用窗口滤波器的直接序列扩频通信系统中的接收机

    公开(公告)号：US5737361A

    公开(公告)日：1998-04-07

    申请号：US562282

    申请日：1995-11-22

    Applicant: Jong-Hyeon Park ,  Je-Woo Kim

    Inventor： Jong-Hyeon Park ,  Je-Woo Kim

    IPC: H04B1/06 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/707

    CPC classification number: H04B1/7077 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/708

    Abstract: A receiver of a direct spread spectrum communication system with a window filter implemented to provide a portion of a correlation signal to a window peak detector while the complete correlation signal is being provided to a peak detector. The receiver demodulates data received in the spread spectrum signal by determining phase position information in response to peak detection signals generated by the peak detector and the window peak detector.

    Abstract translation: 具有窗口滤波器的直接扩频通信系统的接收机，其被实现为在将完整的相关信号提供给峰值检测器时向窗口峰值检测器提供相关信号的一部分。 接收机通过响应由峰值检测器和窗口峰值检测器产生的峰值检测信号确定相位位置信息来解调在扩频信号中接收的数据。

    Full duplex ultrawide-band communication system and method
    67.
    发明授权
    Full duplex ultrawide-band communication system and method 失效
    全双工超宽带通信系统及方法

    公开(公告)号：US5687169A

    公开(公告)日：1997-11-11

    申请号：US428489

    申请日：1995-04-27

    Applicant: Larry W. Fullerton

    Inventor： Larry W. Fullerton

    IPC: H04B1/38 ,  H04B1/56 ,  H04B1/69 ,  H04B1/7075 ,  H04B1/708 ,  H04B1/7163 ,  H04B1/7183 ,  H04B1/719 ,  H04B7/00 ,  H04B14/02 ,  H04B15/00 ,  H04L5/14 ,  H04J3/06

    CPC classification number: H04L5/14 ,  H04B1/56 ,  H04B1/70753 ,  H04B1/71632 ,  H04B14/026 ,  H04B1/708 ,  H04B1/7183 ,  H04B1/719 ,  H04B2001/6908 ,  H04B2201/70707

    Abstract: An impulse radio transceiver for full duplex ultrawide-band communications. The transceiver comprises an impulse radio transmitter to transmit impulse radio signal pulses, an impulse radio receiver to receive impulse radio signal pulses. Either or both of the impulse radio transmitter and the impulse radio receiver, synchronizes the transmission and the reception of the impulse radio signal pulses for pulse interleaved communications. Pulse interleaving avoids self-interference between the transmitted impulse radio signal pulses and the received impulse radio signal pulses. In addition to pulse interleaved communications, bursts of pulses can be transmitted between two transceivers in an interleaved fashion. Alternatively, two different pulse repetition rates are be used to transmit and receive impulse radio signal pulses simultaneously. Still further, selected pulses of the received or transmitted impulse radio signal pulses are blanked to avoid interference.

    Abstract translation: 用于全双工超宽带通信的脉冲无线电收发器。 收发器包括用于发送脉冲无线电信号脉冲的脉冲无线电发射机，用于接收脉冲无线电信号脉冲的脉冲无线电接收机。 脉冲无线电发射机和脉冲无线电接收机之一或两者同步用于脉冲交织通信的脉冲无线电信号脉冲的传输和接收。 脉冲交错避免了传输的脉冲无线电信号脉冲与接收到的脉冲无线电信号脉冲之间的自干扰。 除了脉冲交错通信之外，可以以交错方式在两个收发器之间传送脉冲串。 或者，可以使用两个不同的脉冲重复率同时发送和接收脉冲无线电信号脉冲。 此外，接收或发送的脉冲无线电信号脉冲的选定脉冲被消隐以避免干扰。

    CDMA communication with a propagation delay between a base and a mobile station taken into account
    68.
    发明授权
    CDMA communication with a propagation delay between a base and a mobile station taken into account 失效
    考虑到基站和移动台之间的传播延迟的CDMA通信

    公开(公告)号：US5617410A

    公开(公告)日：1997-04-01

    申请号：US404503

    申请日：1995-03-15

    Applicant: Mariko Matsumoto

    Inventor： Mariko Matsumoto

    IPC: H04B1/69 ,  H04B1/7075 ,  H04B7/26 ,  H04J3/06 ,  H04J13/00 ,  H04L7/00 ,  H04J13/04

    CPC classification number: H04W56/0075 ,  H04B7/2668 ,  H04J13/00 ,  H04J3/0682

    Abstract: In a CDMA communication network, each base station (BS) is made to establish synchronism between a downward transmission signal directed to a mobile station (MS) and an upward reception signal received from the mobile station by adjusting in the mobile station a mobile generated SS pattern into an adjusted SS pattern of producing an upward transmission signal for reception at the base station as the upward reception signal. In order to get the adjusted SS pattern, the base station inserts in the downward transmission signal an inserted signal representative of a propagation delay t(D) between the base and the mobile stations and a propagation delay increment t(d) while the mobile station is in a prelminary state of receiving the downward transmission signal as a downward reception signal first from the base station and is in a steady state, respectively. The signals may ba propagated through at least one communication satellite. Preferably, each mobile station comprises a delay circuit (53) for synchronizing the adjusted SS pattern with an adjusted time, which is equal to t(B)-t(D) and to t(B)-t(d) in the preliminary and the steady states, where t(B) represents a base station absolute time at which a base generated SS pattern is generated for downward transmission signals directed to mobile stations covered by the base station.

    Abstract translation: 在CDMA通信网络中，使每个基站（BS）通过在移动台中调整移动台生成的SS来建立与定向到移动站（MS）的向下传输信号和从移动站接收的向上接收信号之间的同步 模式变成调整后的SS模式，产生用于在基站接收的向上传输信号作为向上接收信号。 为了获得调整后的SS模式，基站在向下传输信号中插入代表基站与移动站之间的传播延迟t（D）的插入信号，并且传播延迟增量t（d），而移动站 处于从基站首先接收下行传输信号作为向下接收信号的预先状态，并处于稳定状态。 信号可以通过至少一个通信卫星传播。 优选地，每个移动台包括一个延迟电路（53），用于将经调整的SS模式与调整后的时间同步，该调整时间等于预备中的t（B）-t（D）和t（B）-t（d） 和稳定状态，其中t（B）表示基站生成的SS模式的基站绝对时间，用于针对由基站覆盖的移动站的向下传输信号。

    Spectrum spread signal reception with differential demodulation of spectrum spread demodulated components at each synchronous point and at a point always one symbol period later
    69.
    发明授权
    Spectrum spread signal reception with differential demodulation of spectrum spread demodulated components at each synchronous point and at a point always one symbol period later 失效
    在每个同步点和总共一个符号周期的一个点的频谱扩展解调分量的差分解调的频谱扩展信号接收

    公开(公告)号：US5612972A

    公开(公告)日：1997-03-18

    申请号：US364701

    申请日：1994-12-28

    Applicant: Mikio Fukushi ,  Hideho Tomita

    Inventor： Mikio Fukushi ,  Hideho Tomita

    IPC: H04B1/707 ,  H04B1/7075 ,  H04K1/00 ,  H04L7/00

    CPC classification number: H04B1/707

    Abstract: In a spectrum spread receiver, a tracking unit tracks successive regions covering maximum correlation values, respectively, in spectrum spread demodulated components to produce a timing signal indicative of synchronous points respectively in the regions. Responsive to the timing signal, a differential demodulator unit demodulates the spectrum spread demodulated components at each synchronous point and at a time which is always one symbol period later than this synchronous point. Differential demodulation is carried out in this manner so as to be faithfully inverse relative to differential modulation in a spectrum spread transmitter.

    Abstract translation: 在频谱扩展接收机中，跟踪单元在频谱扩展解调分量中分别跟踪覆盖最大相关值的连续区域，以产生分别表示该区域中的同步点的定时信号。 响应于定时信号，差分解调器单元在每个同步点和总是比该同步点晚一个符号周期的时间解调频谱扩展解调分量。 以这种方式进行差分解调，以便相对于频谱扩展发射机中的差分调制是忠实地反向的。

    Multi-level correlation system for synchronization detection in high noise and multi-path environments
    70.
    发明授权
    Multi-level correlation system for synchronization detection in high noise and multi-path environments 失效
    用于高噪声和多路径环境中的同步检测的多级相关系统

    公开(公告)号：US5598429A

    公开(公告)日：1997-01-28

    申请号：US276033

    申请日：1994-07-15

    Applicant: Kenneth E. Marshall

    Inventor： Kenneth E. Marshall

    IPC: H04B1/7075 ,  H04B1/7077 ,  H04B1/708 ,  H04L27/30

    CPC classification number: H04B1/70752 ,  H04B1/70755 ,  H04B1/70775 ,  H04B1/708 ,  H04B1/70751

    Abstract: A multi-level correlation technique and apparatus for detecting symbol and data frame synchronization in high noise and multi-path environments, wherein received signals are correlated with known pseudorandom noise (PN) or other known codes at the base level and the base level correlation results are in turn correlated with PN or other known codes at the next higher level, such that the top level of correlation includes all lower levels of encoding in the complete synchronization pattern. In a two level implementation, the base level codes define symbols while the top level code defines the synchronization pattern in terms of the base level symbols. Correlation hardware is minimized while processing gain is maximized for enhancing low signal to noise levels over a long synchronization pattern. Additionally, precise ranging is facilitated because the top level correlation result covers the entire synchronization pattern.

    Abstract translation: 一种用于在高噪声和多径环境中检测符号和数据帧同步的多级相关技术和装置，其中接收的信号与已知的伪随机噪声（PN）或其他已知的基准码相关，并且基本相关结果 这又与PN或其他已知的代码在下一个更高的级别相关联，使得相关的最高级别包括完整同步模式中的所有较低级别的编码。 在两级实现中，基本级代码定义符号，而顶级代码根据基本级符号定义同步模式。 相对硬件被最小化，同时处理增益最大化，以通过长同步模式增强低信噪比。 另外，由于顶级相关结果覆盖了整个同步模式，所以精确测距是有利的。

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