公开(公告)号：US06459723B1

公开(公告)日：2002-10-01

申请号：US09310389

申请日：1999-05-12

申请人： Je-Woo Kim ,  Young-Jun Hwang ,  Soon-Young Yoon ,  Jae-Heung Yeom

发明人： Je-Woo Kim ,  Young-Jun Hwang ,  Soon-Young Yoon ,  Jae-Heung Yeom

IPC分类号： H04B1707

CPC分类号： H04W52/367 ,  H04B1/707 ,  H04B2201/70706 ,  H04W52/52

摘要： A device and method are provided for reducing the peak-to-average power ratio of a mobile station's transmit power in a mobile communication system by spreading and modulating the transmission data by a complex spreading sequence. The complex spreading sequence is generated to have a plurality of chips and a phase difference of 90° between every two successive complex chips in response to each chip of a PN (Pseudo Noise) sequence. The device and method flexibly control the mobile transmit power by limiting its peak-to-average power ratio to a specific range and thus confining the mobile transmit power to a linear characteristic portion in a characteristic curve of a power amplifier. The phase of the complex spreading sequence is prevented from shifting by 180° (i.e., &pgr;) to maintain the mobile transmit power in the linear portion of the power amplifier characteristic curve.

摘要翻译： 提供一种装置和方法，用于通过以复扩展顺序扩展和调制发送数据来减少移动台在移动通信系统中的发射功率的峰均功率比。 响应于PN（伪噪声）序列的每个芯片，产生复扩展序列以具有多个芯片，并且在每两个连续复合码片之间具有90°的相位差。 该装置和方法通过将其峰值平均功率比限制在特定范围并且因此将移动发射功率限制在功率放大器的特性曲线中的线性特征部分来灵活地控制移动发射功率。 复数扩展序列的相位被防止偏移180°（即，pi），以将移动发射功率保持在功率放大器特性曲线的线性部分。

公开(公告)号：US06442193B1

公开(公告)日：2002-08-27

申请号：US09281350

申请日：1999-03-30

申请人： Olaf Josef Hirsch

发明人： Olaf Josef Hirsch

IPC分类号： H04B1707

CPC分类号： H04B1/7115 ,  H04B1/712

摘要： A spread spectrum communication device having a channel estimator and a rake receiver with a number of rake fingers. The spread spectrum communication device is used in a direct sequence spread spectrum, code division multiple access system. In the spread spectrum system, symbols are spread by a pseudo-noise reference sequence, with a chip rate substantially higher than a symbol rate of the symbols, the spread symbols are modulated onto a carrier, and the carrier modulated signals are transmitted over an air-interface. The air-interface tends to produce multipath components of the transmitted signal. The spread spectrum communication device receives the multipath components, and demodulates symbols intended for it, by de-spreading the received signals with a locally generated pseudo-noise reference sequence, and coherently adding multipath resolved components intended for it. After carrier demodulation of the received signals, the spread spectrum communication device samples the demodulated signals with a sampling rate exceeding the chip rate so that samples at a sub-chip resolution are obtained. Individual rake fingers coherently combine multipath components resolved at a sub-chip resolution, whereas separate rake fingers process multipath components spaced apart more than one chip. The rake receiver coherently combines the sub-chip resolved multipath components as coherently added in the individual rake fingers, and the multipath components spaced apart more than one chip.

摘要翻译： 一种扩频通信装置，具有信道估计器和具有多个耙指的耙式接收机。 扩频通信设备用于直接序列扩频，码分多址系统。 在扩频系统中，符号通过伪噪声参考序列扩展，码片速率明显高于码元的码元速率，扩频符号被调制到载波上，载波调制信号通过空中传输 -接口。 空中接口倾向于产生发射信号的多径分量。 扩展频谱通信设备接收多路径分量，并且通过用本地产生的伪噪声参考序列对接收到的信号进行解扩，并且相干地添加旨在为它的多路径解析的分量来解调旨在给它的符号。 在接收信号的载波解调之后，扩频通信设备以超过码片速率的采样率对解调信号进行采样，从而获得子芯片分辨率的样本。 单个耙指相干地组合以子芯片分辨率分辨的多径分量，而单独的耙指处理多个分离多个芯片的多径分量。 耙式接收机相干地组合在各个耙指中相干地添加的子芯片分辨的多径分量，以及多于一个芯片间隔开的多径分量。

公开(公告)号：US06414988B1

公开(公告)日：2002-07-02

申请号：US09310232

申请日：1999-05-12

申请人： Fuyun Ling

发明人： Fuyun Ling

IPC分类号： H04B1707

CPC分类号： H04B1/7115 ,  H04B2201/70703 ,  H04L25/0214

摘要： Apparatus for a transmitter and a receiver which enhance the performance of a system coherent demodulation by utilizing non-pilot sub-channels to enhance the accuracy of estimates of amplitude and phase noise inherent in the transmission channel is described. This enhancement is accomplished by utilizing the corrected received data on a fundamental channel to enhance a pilot channel estimate, which is subsequently utilized by a dot product module in demodulating a supplementary data channel.

摘要翻译： 描述了用于通过利用非导频子信道来提高传输信道固有的幅度和相位噪声的估计精度来增强系统相干解调性能的发射机和接收机的装置。 该增强通过利用基本信道上的校正的接收数据来增强导频信道估计来实现，该导频信道估计随后由点积模块在解调辅助数据信道中使用。

公开(公告)号：US06400757B1

公开(公告)日：2002-06-04

申请号：US09496352

申请日：2000-02-02

申请人： Jimmy Cuong Tran ,  Sorin Davidovici

发明人： Jimmy Cuong Tran ,  Sorin Davidovici

IPC分类号： H04B1707

CPC分类号： H03H17/0254

摘要： A superior and scaleable architecture for implementing a large bit matched filter. The implementation of the bit matched filter requires less silicon and consumes less power as compared to the existing design. An effective way to turn the bit matched filter on and off for power saving is also disclosed.

摘要翻译： 用于实现大比特匹配滤波器的优越且可扩展的架构。 与现有设计相比，位匹配滤波器的实现需要更少的硅，并消耗更少的功率。 还公开了打开和关闭比特匹配滤波器以节省功率的有效方式。

公开(公告)号：US06345067B1

公开(公告)日：2002-02-05

申请号：US09110438

申请日：1998-07-06

申请人： Naoki Okamoto

发明人： Naoki Okamoto

IPC分类号： H04B1707

CPC分类号： H04B1/7085 ,  H04L7/08

摘要： A clock regenerating circuit is capable of stably generating a correct regenerated clock operated based upon a correlation signal output also in a system for multiplexing plural series of signals in which a signal which is spread with a spreading code is delayed each other by optional several chips. Only a portion of a correlation signal having a correlation peak is sequentially extended on a time axis, and is compared with a threshold value which is given from a terminal in comparators. The resultants of comparison are added to each other in adders to specify a position where an overflow occurred (the position representing advance or lag of the clock). Switching of the frequency dividing circuit is conducted in a clock regenerating unit in response to the output so that a clock which is in a correct timing relation is reproduced. In case of delay multiplexing, each component is controlled to lower the threshold value, to increase overflow, and narrow the time window with the increase in the multiplexing number, to provide an optimal condition.

摘要翻译： 时钟再生电路能够稳定地产生基于在多路复用多个信号的系统中输出的相关信号进行操作的正确的再生时钟，其中扩展码扩展的信号可以通过可选的几个码片相互延迟。 在时间轴上仅依次扩展具有相关峰值的相关信号的一部分，并将其与在比较器中从终端给出的阈值进行比较。 比较的结果被添加到彼此中以指定溢出发生的位置（表示时钟的提前或滞后的位置）。 响应于输出，在时钟再生单元中进行分频电路的切换，从而再现正确的定时关系的时钟。 在延迟复用的情况下，控制每个分量以降低阈值，增加溢出，并且随着复用数量的增加而缩短时间窗口，以提供最佳条件。

公开(公告)号：US06256340B1

公开(公告)日：2001-07-03

申请号：US09280328

申请日：1999-03-29

申请人： Donald L. Schilling

发明人： Donald L. Schilling

IPC分类号： H04B1707

CPC分类号： H04B7/0894 ,  G01S3/42 ,  H01Q3/22 ,  H01Q3/26 ,  H01Q3/2605 ,  H01Q3/2682 ,  H04B1/1081 ,  H04B1/69 ,  H04B1/707 ,  H04B7/084 ,  H04L1/06

摘要： A phased array spread spectrum system for maximizing signal strength of a spread-spectrum signal with multipath through the use of receiving means, delaying means, combining means, despreading means, generating means, storing means and comparing means. The receiving means receives a plurality of spread-spectrum signals and a plurality of phased versions of the plurality of spread-spectrum signals. The delaying means delays the received plurality of spread-spectrum signals with respect to the plurality of phased versions of the plurality of spread-spectrum signals by a plurality of delays. The combining means combines the delayed spread-spectrum signals and the plurality of phased versions of the plurality of spread-spectrum signals as a plurality of combined signals. The despreading means despreads the plurality of combined signals as a plurality of despread signals. The generating means generates a plurality of magnitude values from the plurality of despread signals. The storing means stores a plurality of previous-magnitude values previously generated by the generating means and a plurality of present magnitude values presently generated by the generating means. The comparing means compares the previous-magnitude values and the present-magnitude values and, responsive to the comparison, outputs a plurality of comparison signals. The delaying means responds to the plurality of comparison signals by lengthening or shortening the plurality of delays.

摘要翻译： 一种相控阵扩频系统，用于通过使用接收装置，延迟装置，组合装置，解扩装置，生成装置，存储装置和比较装置，使多径的扩频信号的信号强度最大化。 接收装置接收多个扩频信号和多个扩频信号的多个相位版本。 延迟装置通过多个延迟将接收到的多个扩频信号相对于多个扩频信号的多个相位版本延迟。 组合装置将延迟扩频信号和多个扩频信号的多个定相版本组合为多个组合信号。 去扩展装置将多个组合信号解扩展为多个解扩信号。 生成装置从多个解扩信号生成多个幅度值。 存储装置存储由生成装置预先生成的多个先前幅度值以及由生成装置当前生成的多个当前幅度值。 比较装置比较先前幅度值和当前幅度值，并且响应于比较，输出多个比较信号。 延迟装置通过延长或缩短多个延迟来响应多个比较信号。

公开(公告)号：US06229843B1

公开(公告)日：2001-05-08

申请号：US09444079

申请日：1999-11-22

申请人： Gary Lomp ,  Fatih Ozluturk ,  Avi Silverberg

发明人： Gary Lomp ,  Fatih Ozluturk ,  Avi Silverberg

IPC分类号： H04B1707

CPC分类号： H04B7/2637 ,  G06F13/374 ,  H03H17/0226 ,  H03H17/06 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/711 ,  H04B1/7115 ,  H04B1/712 ,  H04B7/2628 ,  H04B7/264 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/70707 ,  H04B2201/7071 ,  H04J13/00 ,  H04J13/004 ,  H04J13/0048 ,  H04J13/0077 ,  H04J13/10 ,  H04J13/107 ,  H04J13/12 ,  H04J13/16 ,  H04J2013/0037 ,  H04L1/0001 ,  H04L1/004 ,  H04L1/0042 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0059 ,  H04L5/1446 ,  H04L25/0212 ,  H04L27/206 ,  H04L27/2332 ,  H04L2027/003 ,  H04L2027/0053 ,  H04N1/00912 ,  H04N1/3333 ,  H04N2201/3335 ,  H04W52/04 ,  H04W52/08 ,  H04W52/143 ,  H04W52/146 ,  H04W52/24 ,  H04W52/241 ,  H04W52/245 ,  H04W52/247 ,  H04W52/26 ,  H04W52/262 ,  H04W52/322 ,  H04W52/325 ,  H04W52/343 ,  H04W52/346 ,  H04W52/36 ,  H04W52/367 ,  H04W52/44 ,  H04W52/50 ,  H04W52/52 ,  H04W52/54 ,  H04W52/60 ,  Y02D10/14

摘要： A CDMA modem includes a modem transmitter having: a code generator which provides an associated pilot code signal and which generates a plurality of message code signals; a spreading circuit which produces a spread-spectrum message signal by combining each of the information signals with a respective one of the message code signals; and a global pilot code generator that provides a global pilot code signal to which the message code signals are synchronized. The CDMA modem also includes a modem receiver having an associated pilot code generator and a group of associated pilot code correlators for correlating code-phase delayed versions of the associated pilot signal with a receive CDM signal to produce a despread associated pilot signal. The code phase of the associated pilot signal is changed responsive to an acquisition signal value until a pilot signal is received. The associated pilot code tracking logic adjusts the associated pilot code signal in phase responsive to the acquisition signal so that the signal power level of the despread associated pilot code signal is maximized. Finally, the CDMA modem receiver includes a group of message signal acquisition circuits, each including a plurality of receive message signal correlators which correlate respective local received message code signal to the CDM signal to produce a respective despread received message signal.

摘要翻译： CDMA调制解调器包括：调制解调器发送器，具有：代码生成器，其提供相关联的导频代码信号并产生多个消息代码信号; 扩展电路，其通过将每个信息信号与相应的一个消息代码信号组合来产生扩频消息信号; 以及提供消息代码信号同步的全局导频码信号的全局导频码发生器。 CDMA调制解调器还包括具有相关联的导频码发生器和一组相关联的导频码相关器的调制解调器接收机，用于将相关导频信号的码相位延迟版本与接收CDM信号相关，以产生解扩相关导频信号。 相应的导频信号的码相位响应于采集信号值而改变，直到接收到导频信号。 相关联的导频代码跟踪逻辑响应于采集信号相位调整相关联的导频代码信号，使得解扩相关导频码信号的信号功率电平最大化。 最后，CDMA调制解调器接收机包括一组消息信号采集电路，每组包括多个接收消息信号相关器，它将相应的本地接收到的消息码信号与CDM信号相关联，以产生相应的解扩接收消息信号。

公开(公告)号：US06215813B1

公开(公告)日：2001-04-10

申请号：US09001260

申请日：1997-12-31

申请人： William W. Jones ,  Thomas J. Kenney

发明人： William W. Jones ,  Thomas J. Kenney

IPC分类号： H04B1707

CPC分类号： H04L1/006 ,  H04B1/707 ,  H04B2001/70935 ,  H04B2201/70701 ,  H04J13/0048 ,  H04L1/0041 ,  H04L27/186

摘要： A method and an apparatus for encoding of trellis coded direct sequence spread spectrum communication signals are provided. An input data bit sequence is received into a transmitter where it is encoded and modulated using trellis code modulation. The encoding comprises encoding the signal using a convolutional coder having a rate equal to 1/log2 (M), where M is a number of biorthogonal Walsh sequences. The encoded and modulated signal is spread by mapping a number of branches of the trellis code to a number of biorthogonal Walsh sequences. The mapping comprises labeling the branches of the trellis code using the biorthogonal Walsh sequences. This mapping uses the output of a convolutional coder as a memory address where the memory address contains one of a number of biorthogonal Walsh sequences. The spread signal may be a binary phase-shift keyed (BPSK) data signal, but is not so limited. A pilot signal is embedded into the spread BPSK data signal to provide phase coherency between the reverse link transmitter and receiver. The BPSK data signal is then multiplexed to form a quadrature phase-shift keyed (QPSK) signal. The QPSK signal is spread using a pseudo-random noise (PN) sequence prior to being transmitted.

摘要翻译： 提供了一种用于编码网格编码直接序列扩频通信信号的方法和装置。 输入数据比特序列被接收到发射机中，其中它使用网格码调制进行编码和调制。 编码包括使用具有等于1 / log2（M）的速率的卷积编码器对信号进行编码，其中M是双正交沃尔什序列的数量。 通过将网格码的多个分支映射到多个双正交沃尔什序列来扩展编码和调制的信号。 该映射包括使用双正交沃尔什序列来标记网格码的分支。 该映射使用卷积编码器的输出作为存储器地址，其中存储器地址包含多个双正交沃尔什序列之一。 扩展信号可以是二进制相移键控（BPSK）数据信号，但不限于此。 导频信号嵌入到扩展的BPSK数据信号中，以提供反向链路发射机和接收机之间的相位一致性。 然后将BPSK数据信号复用以形成正交相移键控（QPSK）信号。 在发送之前，使用伪随机噪声（PN）序列扩展QPSK信号。

公开(公告)号：US06836506B2

公开(公告)日：2004-12-28

申请号：US10229585

申请日：2002-08-27

申请人： Jon J. Anderson

发明人： Jon J. Anderson

IPC分类号： H04B1707

CPC分类号： H04W56/004 ,  G01S19/256 ,  H04B7/2684

摘要： A system and method for synchronizing a number of specialized circuits or application-specific integrated circuits to a common timing standard is provided. The system includes a first communications device including at least first and second type communication paths which is configured to receive first and second timing signals in the first type communications path and to transmit data on the second type communications path. The data is transmitted in association with the received first timing signal. A controller or signal processor element is coupled to the first device and configured to receive the second timing signal and produce a timing word therefrom. A second communications device is coupled to the processor and configured to receive the second timing signal and produce a timing word therefrom. The second communications. device receives the timing word and the transmitted data and derives synchronization information therefrom. The derived synchronization information is related to the first timing signal. The second communications device performs one or more operations in accordance with the received second timing signal and the derived synchronization information.

公开(公告)号：US06836505B2

公开(公告)日：2004-12-28

申请号：US09778095

申请日：2001-02-07

申请人： Yuzo Eto

发明人： Yuzo Eto

IPC分类号： H04B1707

CPC分类号： H04B1/7113 ,  H04B1/709

摘要： The spreading code generation apparatus of the present invention temporarily stores a spreading code string generated from one spreading code generator in memory (shift register or RAM). Then, after providing a necessary delay based on synchronization acquisition information output from a searcher, the code generation apparatus supplies the spreading code stored in memory to one of a plurality of correlators. This makes it possible to give a spreading code whose phase is adjusted to correspond to a specific path of multi-paths to the correlator.

摘要翻译： 本发明的扩展码产生装置将从一个扩展码发生器产生的扩展码串临时存储在存储器（移位寄存器或RAM）中，然后在基于从搜索者输出的同步获取信息提供必要的延迟之后，生成代码 设备将存储在存储器中的扩展码提供给多个相关器中的一个。 这使得可以给出其相位被调整以对应于到相关器的多路径的特定路径的扩展码。