公开(公告)号：US20020054622A1

公开(公告)日：2002-05-09

申请号：US10026798

申请日：2001-12-27

Inventor： Shigeyuki Sudo ,  Osamu Hasegawa ,  Toshiya Eguchi

IPC: H04K001/00

CPC classification number: H04B1/70756 ,  H04B1/707 ,  H04B1/7075 ,  H04B2201/70709 ,  H04W52/029 ,  Y02D70/26 ,  Y02D70/40

Abstract: A receiver for the CDMA system, in order to reduce a power consumption during a suspension period of intermittent receiving operation, monitors a suspension period t1 by means of a low-power timer 51 so that a VC-TCXO 1, a reference signal group generation unit 2 and a receiving unit 3 are turned off and a modem unit 4 is set to a sleep state. Upon resumption of receiving operation, a high-accuracy timer 44 is supplied with a start (d) to require counting of time t3 and a part of a received signal is stored. A PN code phase of stored data is calculated in a PN code phase calculator 46 during a period t3 to obtain an indication value i for a phase deviation. State vectors for short code and long code and further a reception time t4 are calculated on the basis of the indication value i to be set. When the high-accuracy timer 44 counts t3 and produces 0V(d), demodulation operation by a rake demodulation unit 40, a demultiplexing unit 41 and a descrambler unit 42 is started in accordance with the setting and is continued during the reception time t4.

公开(公告)号：US6088578A

公开(公告)日：2000-07-11

申请号：US218969

申请日：1998-12-22

Applicant: Serge Manning ,  Kim Chang

Inventor： Serge Manning ,  Kim Chang

IPC: H04B1/707 ,  H04L12/56 ,  H04W28/18 ,  H04W28/22 ,  H04W52/00 ,  H04W72/00 ,  H04Q7/38

CPC classification number: H04W28/18 ,  H04B1/707 ,  H04B2201/70709 ,  H04W28/22 ,  H04W72/00

Abstract: Disclosed is an apparatus and method for increasing the efficiency of usage of an assigned rf spectrum used by a cellular or wireless communication system for a large number of high speed data transfer user requests. An MS, upon analyzing a plurality of parameters available to the MS may determine that although it needs more than a single channel to accommodate a given software data generating application, it may adequately and optimally use less than the maximum number of channels (or maximum data rate) that the MS can support. The MS then generates a request to the base station for additional channels (or a supplemental channel of a higher data rate) to transmit in one data burst a specified total number of quantity of data. The request may also specify the maximum number of channels (or maximum data rate) that the MS can support along with an indication of relative priority by means of indicating the amount of time over which the burst occur as an optimum situation for the MS. The response from the base station may downwardly adjust the number of channels (or data rate) from that considered optimal in the request by a mobile station for a high speed data burst when available system resources are inadequate to accommodate all requests.

Abstract translation: 公开了一种用于提高蜂窝或无线通信系统对于大量高速数据传输用户请求所使用的所分配的rf频谱的使用效率的装置和方法。 MS在分析可用于MS的多个参数时可以确定尽管它需要多于单个信道以适应给定的软件数据生成应用，但是它可以充分和最佳地使用小于最大数量的信道（或最大数据 率）MS可以支持。 然后，MS向基站生成用于在一个数据突发中发送指定数量的数据量的附加信道（或更高数据速率的补充信道）的请求。 该请求还可以通过指示突发发生的时间量作为MS的最佳情况来指定MS可以支持的最大信道数（或最大数据速率）以及相对优先级的指示。 当可用的系统资源不足以容纳所有请求时，来自基站的响应可以向下调整由移动台在高速数据突发的请求中考虑的最佳信道数（或数据速率）。

公开(公告)号：US6044104A

公开(公告)日：2000-03-28

申请号：US209277

申请日：1998-12-11

Applicant: Masatoshi Watanabe

Inventor： Masatoshi Watanabe

IPC: H04B1/7083 ,  H04B7/26 ,  H04J13/00 ,  H04W36/00 ,  H04W36/36 ,  H04W48/16 ,  H04W76/02 ,  H04B15/00 ,  H04B7/21

CPC classification number: H04B1/708 ,  H04B1/70756 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7117 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70709

Abstract: Search control means 8 of a mobile station apparatus divides a search window received into a number of search widths corresponding to the number of search correlators 3 and makes each of correlators 3 carry out correlative detection about these divided search widths simultaneously in a 1st integrating time. It further selects multiple phases in descending order of detected correlative values, makes each correlator carry out correlative detection about these selected phases simultaneously in an integrating time longer than the 1st integrating time and combines powers of correlative values by the number of demodulable phases starting from the largest detected correlative value.

Abstract translation: 移动站装置的搜索控制装置8将接收到的搜索窗口与搜索相关器3的数量相对应的搜索宽度的数量进行分割，并且使每个相关器3在第一积分时间中同时进行关于这些划分的搜索宽度的相关检测。 它进一步以检测到的相关值的降序选择多个相位，使得每个相关器在比第一积分时间长的积分时间中同时执行关于这些选定相的相关检测，并将相关值的功率与从 最大检测相关值。

公开(公告)号：US5987059A

公开(公告)日：1999-11-16

申请号：US883420

申请日：1997-06-26

Applicant: Daniel David Harrison ,  Jerome Johnson Tiemann

Inventor： Daniel David Harrison ,  Jerome Johnson Tiemann

IPC: G01S1/00 ,  G01S5/00 ,  G01S5/14 ,  G01S19/23 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/16 ,  H04B1/707 ,  H04B1/708 ,  H04B1/7107 ,  H04B15/00 ,  G01S5/02

CPC classification number: H04B1/708 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S5/0027 ,  G01S5/0036 ,  G06F17/15 ,  H04B1/707 ,  H04B1/71075 ,  G01S19/42 ,  G01S5/0054 ,  H04B2201/70709 ,  H04W52/0283

Abstract: A direct sequence spread spectrum receiver receives an input signal on a signal carrier frequency. The receiver generates a local oscillator signal which is offset from the carrier frequency. The input signal and the local oscillator signal are mixed producing an IF signal which is converted to a digital sample and stored in memory. A corresponding replica signal is generated and correlated with the digital sample. The offset of the local oscillator frequency from the carrier frequency is sufficiently large to cause the harmonics of the replica signal to fall above the highest frequency of the IF signal. Such a receiver is useful in global positioning satellite (GPS) signal processing where a replica generator must be used to acquire the incoming satellite transmissions.

Abstract translation: 直接序列扩频接收机接收信号载波频率上的输入信号。 接收机产生偏离载波频率的本地振荡器信号。 输入信号和本地振荡器信号混合，产生IF信号，该IF信号被转换成数字采样并存储在存储器中。 生成相应的复制信号并与数字样本相关联。 本地振荡器频率与载波频率的偏移足够大，导致副本信号的谐波降到高于IF信号的最高频率。 这样的接收机在全球定位卫星（GPS）信号处理中是有用的，其中必须使用复制发生器来获取进入的卫星传输。

公开(公告)号：US5781584A

公开(公告)日：1998-07-14

申请号：US689143

申请日：1996-07-30

Applicant: Changming Zhou ,  Guoliang Shou ,  Makoto Yamamoto ,  Sunao Takatori

Inventor： Changming Zhou ,  Guoliang Shou ,  Makoto Yamamoto ,  Sunao Takatori

IPC: H03H17/02 ,  H03H11/04 ,  H04B1/709 ,  H04J13/00 ,  H04L7/00 ,  H04L7/10 ,  H04B1/707

CPC classification number: H04B1/708 ,  H04B1/7085 ,  H04B1/7093 ,  H04B1/7095 ,  H04B2201/70709

Abstract: A filter circuit largely reducing electric power consumption compared with a conventional one, as well as realizing the initial acquisition in high enough speed. In a filter circuit according to the present invention, a matched filter and a sliding correlator are used in parallel; the first acquisition and holding is executed by a matched filter, a correlating operation is executed by a sliding correlator and a voltage supply to the matched filter is stopped.

Abstract translation: 与现有技术相比，大大降低电力消耗的滤波电路，以及以足够高的速度实现初始采集。 在根据本发明的滤波器电路中，并行使用匹配滤波器和滑动相关器， 通过匹配滤波器执行第一采集和保持，通过滑动相关器执行相关操作，并且停止对匹配滤波器的电压供应。

公开(公告)号：US5491718A

公开(公告)日：1996-02-13

申请号：US178401

申请日：1994-01-05

Applicant: Adam F. Gould ,  James R. Robertson ,  John W. Noneman ,  John R. Gelm

Inventor： Adam F. Gould ,  James R. Robertson ,  John W. Noneman ,  John R. Gelm

IPC: H04B1/7075 ,  H04B7/26 ,  H04J13/10 ,  H04W52/02 ,  H04W68/00 ,  H04B1/69

CPC classification number: H04J13/10 ,  H04B7/2618 ,  H04W52/0216 ,  H04B1/70756 ,  H04B2201/70709 ,  H04W68/00

Abstract: A radiotelephone (10) capable of operation within a CDMA radiotelephone system. The radiotelephone includes a receiver (30) for receiving a paging channel transmission; a system time pseudonoise (PN) generator (18); and despreading circuitry (20, 22, 24 26, 28), having an input coupled to the receiver, for despreading the paging channel transmission received during at least a portion of the assigned slot. The assigned slot is predetermined to have a duration that is three times the duration of a rollover period of the system time pseudonoise (PN) generator (26.667 msec) and four times the duration of one frame (20 msec), or 80 msec. The use of predetermined masks for initializing the PN generators, and in particular a Long Code PN generator (32), is also described.

Abstract translation: 能够在CDMA无线电话系统内操作的无线电话机（10）。 无线电话机包括用于接收寻呼信道传输的接收机（30） 系统时间伪噪声（PN）发生器（18）; 和解扩电路（20,22,24,28,28），其具有耦合到接收器的输入，用于解扩在所分配的时隙的至少一部分期间接收到的寻呼信道传输。 所分配的时隙被预定为具有系统时间伪噪声（PN）发生器（26.667毫秒）的翻转周期的持续时间的三倍的持续时间，以及一帧的持续时间（20毫秒）或80毫秒的四倍的持续时间。 还描述了使用用于初始化PN发生器，特别是长码PN发生器（32）的预定掩模。

公开(公告)号：US4943974A

公开(公告)日：1990-07-24

申请号：US260614

申请日：1988-10-21

Applicant: Masoud Motamedi

Inventor： Masoud Motamedi

IPC: G01S13/87 ,  H04B1/7075

CPC classification number: H04B1/70753 ,  G01S13/878 ,  H04B2201/70709

Abstract: A method is disclosed for detecting the presence of and synchronizing to burst transmissions which contain repeated acquisition codes. The received signal is applied as an input to a surface acoustic wave (SAW) filter which is matched to detect one repetition of the code. The SAW filter correlation output is sampled at times corresponding to the times of arrival of each repetition of the code. The mean value and variance of the correlation values for each repetition are computed, and the system declares an acquisition when the mean value and variance meet certain criteria.

Abstract translation: 公开了一种用于检测包含重复获取代码的突发传输的存在和同步的方法。 所接收的信号作为输入，被施加到匹配的表面声波（SAW）滤波器，以检测代码的一个重复。 SAW滤波器相关输出在对应于代码的每次重复的到达时间的时间被采样。 计算每个重复的相关值的平均值和方差，当平均值和方差满足某些标准时，系统声明采集。

公开(公告)号：US20130201962A1

公开(公告)日：2013-08-08

申请号：US13423859

申请日：2012-03-19

Applicant: James A. Proctor, JR.

Inventor： James A. Proctor, JR.

IPC: H04B7/26

CPC classification number: H04B7/2628 ,  H04B1/7075 ,  H04B1/70754 ,  H04B2001/70706 ,  H04B2201/70703 ,  H04B2201/70709 ,  H04B2201/70715 ,  H04J13/0022 ,  H04J13/004 ,  H04J13/16 ,  H04J13/18 ,  H04L1/0007 ,  H04L1/165 ,  H04L1/1809 ,  H04L7/06 ,  H04L25/14 ,  H04L27/2601 ,  H04Q11/0428 ,  H04Q2213/13098 ,  H04Q2213/13202 ,  H04Q2213/13204 ,  H04Q2213/13209 ,  H04Q2213/13216 ,  H04Q2213/1327 ,  H04Q2213/13298 ,  H04Q2213/13332 ,  H04Q2213/1336 ,  H04Q2213/13389 ,  H04W24/00 ,  H04W28/20 ,  H04W28/22 ,  H04W56/00 ,  H04W56/0045 ,  H04W56/0075 ,  H04W72/0413 ,  H04W72/044 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/0466 ,  H04W74/00 ,  H04W74/04 ,  H04W76/28 ,  H04W84/14

Abstract: A subscriber access unit includes a transceiver for providing wireless communication of digital signals. The digital signals are communicated to a base station using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes. Orthogonal subchannels are made available by the base station within each CDMA RF channel. A bandwidth manager is connected to the transceiver, and when the transceiver is actively sending data, at least one orthogonal subchannel is allocated by the base station on an as-needed basis. The number of orthogonal subchannels being allocated changes during a given session. The transceiver, when powered on but not actively sending data, provides an idling mode connection on a reverse link. The idling mode connection is based on an orthogonal subchannel shared with at least one other subscriber access unit, but utilizes different time slots of the shared orthogonal subchannel.

Abstract translation: 用户接入单元包括用于提供数字信号的无线通信的收发器。 使用由正交码定义的码分多址（CDMA）调制无线电信号，使用至少一个射频（RF）信道将数字信号传送到基站。 正交子信道由每个CDMA RF信道内的基站提供。 带宽管理器连接到收发器，并且当收发器正在主动发送数据时，基站根据需要分配至少一个正交子信道。 被分配的正交子信道的数量在给定会话期间改变。 收发器在上电但不主动发送数据时，在反向链路上提供空闲模式连接。 空闲模式连接基于与至少一个其他用户接入单元共享的正交子信道，但是利用共享正交子信道的不同时隙。

公开(公告)号：US08170084B2

公开(公告)日：2012-05-01

申请号：US13216779

申请日：2011-08-24

Applicant: Parvathanathan Subrahmanya ,  Thejaswi Bharadwaj Madapushi Sheshadri ,  Vivek Chawla

Inventor： Parvathanathan Subrahmanya ,  Thejaswi Bharadwaj Madapushi Sheshadri ,  Vivek Chawla

IPC: H04B1/00

CPC classification number: H04L27/2278 ,  H04B1/7085 ,  H04B2201/70709 ,  H04L2027/003 ,  H04L2027/0034 ,  H04L2027/0065 ,  H04W52/0229 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/166 ,  Y02D70/24 ,  Y02D70/40

Abstract: Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.

Abstract translation: 使用快速频率跟踪（QFT），快速时间跟踪（QTT）和非因果导频滤波（NCP）来检测偶发地发送的信令，例如寻呼指示符。 对于QFT，将多个假设频率误差应用于输入信号以获得多个旋转信号。 计算旋转信号的能量。 提供具有最大能量的假设频率误差作为频率误差估计。 对于QTT，对于第一组时间偏移的输入信号执行相干累加，例如早，时，晚。 然后执行插值，能量计算和非相干累加，以获得具有更高时间分辨率的定时误差估计。 对于NCP，使用非因果滤波器对导频符号进行滤波，以获得用于非STTD的一个天线和用于STTD的两个天线的导频估计。 频率和定时误差估计和导频估计用于检测信令。

公开(公告)号：US20110306315A1

公开(公告)日：2011-12-15

申请号：US13216779

申请日：2011-08-24

Applicant: Parvathanathan Subrahmanya ,  Thejaswi Bharadwaj Madapushi Sheshadri ,  Vivek Chawla

Inventor： Parvathanathan Subrahmanya ,  Thejaswi Bharadwaj Madapushi Sheshadri ,  Vivek Chawla

IPC: H04B17/00

CPC classification number: H04L27/2278 ,  H04B1/7085 ,  H04B2201/70709 ,  H04L2027/003 ,  H04L2027/0034 ,  H04L2027/0065 ,  H04W52/0229 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/166 ,  Y02D70/24 ,  Y02D70/40

Abstract: Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.

Abstract translation: 使用快速频率跟踪（QFT），快速时间跟踪（QTT）和非因果导频滤波（NCP）来检测偶发地发送的信令，例如寻呼指示符。 对于QFT，将多个假设频率误差应用于输入信号以获得多个旋转信号。 计算旋转信号的能量。 提供具有最大能量的假设频率误差作为频率误差估计。 对于QTT，对于第一组时间偏移的输入信号执行相干累加，例如早，时，晚。 然后执行插值，能量计算和非相干累加，以获得具有更高时间分辨率的定时误差估计。 对于NCP，使用非因果滤波器对导频符号进行滤波，以获得用于非STTD的一个天线和用于STTD的两个天线的导频估计。 频率和定时误差估计和导频估计用于检测信令。