公开(公告)号：US5659573A

公开(公告)日：1997-08-19

申请号：US317501

申请日：1994-10-04

Applicant: Eugene J. Bruckert ,  Fuyun Ling

Inventor： Eugene J. Bruckert ,  Fuyun Ling

IPC: H04B1/707 ,  H04B1/7087 ,  H04B1/7117 ,  H04J3/06 ,  H04L25/02 ,  H04L27/227 ,  H04K1/00 ,  H04L7/00

CPC classification number: H04B1/7087 ,  H04B1/707 ,  H04J3/0605 ,  H04L25/0202 ,  H04L27/2276 ,  H04B1/7117 ,  H04B2201/70703 ,  H04B2201/70705

Abstract: A method and apparatus is provided for facilitating coherent communication reception. A received reference symbol coded spread spectrum communication signal is despread with a spreading code to derive a stream of reference samples and a stream of data samples. The channel response is estimated by utilizing the stream of reference samples. An offset frequency detector determines an offset to be applied to the received signal via a frequency locked loop, while a timing control compensates for slow timing drift and fast fading based on power estimates derived from the stream of reference samples and/or the stream of data samples. A slot detector controls gates which optimize the timing control and frequency offset detector outputs from the various timing branches. Thus an improved detection of estimated data symbols from the stream of received data samples is provided.

Abstract translation: 提供了一种用于促进相干通信接收的方法和装置。 接收到的参考符号编码的扩展频谱通信信号用扩展码进行解扩，以导出参考样本流和数据采样流。 通过利用参考样本流来估计信道响应。 偏移频率检测器通过频率锁定环来确定要施加到接收信号的偏移，而定时控制基于从参考样本流和/或数据流导出的功率估计来补偿慢定时漂移和快衰落 样品。 时隙检测器控制门，其优化来自各种定时分支的定时控制和频率偏移检测器输出。 因此，提供了从接收的数据样本流中对估计数据符号的改进的检测。

公开(公告)号：US5619524A

公开(公告)日：1997-04-08

申请号：US396453

申请日：1995-02-28

Applicant: Fuyun Ling ,  Thomas A. Sexton ,  Gene Bruckert

Inventor： Fuyun Ling ,  Thomas A. Sexton ,  Gene Bruckert

IPC: H04L27/22 ,  H04B1/707 ,  H04J3/06 ,  H04L7/00 ,  H04L25/02 ,  H04L27/227 ,  H04K1/00 ,  H04B1/66

CPC classification number: H04B1/7087 ,  H04B1/707 ,  H04J3/0605 ,  H04L25/0202 ,  H04L27/2276 ,  H04B1/7117 ,  H04B2201/70703 ,  H04B2201/70705

Abstract: A method and apparatus is provided for facilitating coherent communication reception. A received reference symbol coded spread spectrum communication signal is despread with a spreading code to derive a stream of reference samples and a stream of data samples. The channel response is estimated by utilizing the stream of reference samples. An offset frequency detector determines an offset to be applied to the received signal via a frequency locked loop, while a timing control compensates for slow timing drift and fast fading based on power estimates derived from the stream of reference samples and/or the stream of data samples. A rate estimator determines the rate at which the information was encoded, and the rate information is used to optimize the timing control, frequency offset detector and channel estimator. Thus an improved detection of estimated data symbols from the stream of received data samples is provided.

Abstract translation: 提供了一种用于促进相干通信接收的方法和装置。 接收到的参考符号编码的扩展频谱通信信号用扩展码进行解扩，以导出参考样本流和数据采样流。 通过利用参考样本流来估计信道响应。 偏移频率检测器通过频率锁定环来确定要施加到接收信号的偏移，而定时控制基于从参考样本流和/或数据流导出的功率估计来补偿慢定时漂移和快衰落 样品。 速率估计器确定信息被编码的速率，速率信息用于优化定时控制，频率偏移检测器和信道估计器。 因此，提供了从接收的数据样本流中对估计数据符号的改进的检测。

公开(公告)号：WO2003036811A1

公开(公告)日：2003-05-01

申请号：PCT/GB2002/004791

申请日：2002-10-23

Applicant: IPWIRELESS, INC. ,  JONES, Alan, Edward ,  TREWREN, David

Inventor： JONES, Alan, Edward ,  TREWREN, David

IPC: H04B1/707

CPC classification number: H04J13/0044 ,  H04B1/707 ,  H04B2201/70705 ,  H04J13/20

Abstract: Processing of a received code division multiple access, CDMA, burst (405) when a spreading factor of the CDMA burst (405) has been changed from an allocated spreading factor (SF o ) to a new spreading factor (SF n ). The received burst (405) is processed with a CDMA detector (310), using the allocated spreading factor (SF o ), to provide a CDMA detector output; the new spreading factor (SF n ) of the burst is determined; and the CDMA detector output is decimated by a factor determined from the new spreading factor (SF n ). The decimator may be a FIR decimator (315) and tap weights may be determined using the values of the new spreading factor (SF n ) and the allocated spreading factor (SF o ). Application in a Node B (150A) of a UMTS system (100), particularly in UTRA TDD mode, for processing received uplink communication is described.

Abstract translation: 当CDMA突发（405）的扩频因子已经从分配的扩频因子（SFo）改变为新的扩频因子（SFn）时，接收到的码分多址，CDMA，突发（405）的处理。 使用所分配的扩频因子（SFo），用CDMA检测器（310）处理所接收的突发（405），以提供CDMA检测器的输出; 确定突发的新扩频因子（SFn）; 并且CDMA检测器输出被从新的扩展因子（SFn）确定的因子抽取。 抽取器可以是FIR抽取器（315），并且可以使用新的扩展因子（SFn）和分配的扩展因子（SFo）的值来确定抽头权重。 描述了在UMTS系统（100）的节点B（150A）中的应用，特别是在UTRA TDD模式中用于处理接收的上行链路通信的应用。

公开(公告)号：WO0213395A3

公开(公告)日：2003-02-13

申请号：PCT/SE0101709

申请日：2001-08-06

Applicant: ERICSSON TELEFON AB L M

Inventor： KARLSSON JONAS ,  HAN JEONGHOON

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B2201/70705

Abstract: A spreading factor detector, for use in a wideband code division multiple access communication system, comprising: a de-scrambler (602), with an input connected to a received baseband signal, and a real signal output (609), and an imaginary signal output (607); a SIR processor (610), with an input connected to the imaginary signal output (607), and plurality of SIR processor outputs; a plurality of matched filters (616), each matched filter having an input connected to the real signal output, and a matched filter output; a non-zero rate spreading factor detector (614) having a plurality of inputs connected to the plurality of matched filter outputs, and a plurality of non-zero rate spreading factor detector outputs; and a zero rate spreading factor detector (626) having a plurality of inputs connected to the plurality of non-zero rate spreading factor detector outputs and the plurality of SIR processor outputs, and an estimated spreading factor output signal.

Abstract translation: 一种扩展因子检测器，用于宽带码分多址通信系统中，包括：解扰器（602），具有连接到接收基带信号的输入和实信号输出（609），以及虚信号 输出（607）; 具有连接到虚信号输出（607）的输入端的SIR处理器（610）和多个SIR处理器输出端; 多个匹配滤波器（616），每个匹配滤波器具有连接到实信号输出的输入端和匹配滤波器输出端; 具有连接到所述多个匹配滤波器输出的多个输入的非零速率扩展因子检测器（614）和多个非零速率扩展因子检测器输出; 以及零速率扩展因子检测器（626），其具有连接到所述多个非零速率扩展因子检测器输出和所述多个SIR处理器输出的多个输入以及估计的扩展因子输出信号。

公开(公告)号：WO0245279A3

公开(公告)日：2003-01-30

申请号：PCT/US0144688

申请日：2001-11-29

Applicant: QUALCOMM INC

Inventor： KHARE ARJUN ,  LIOU TYNGHUEI

IPC: H04B1/707 ,  H04B7/26 ,  H04L12/56 ,  H04W8/18 ,  H04W24/00 ,  H04W28/22

CPC classification number: H04W28/22 ,  H04B7/264 ,  H04B2201/70705 ,  H04W8/18 ,  H04W24/00

Abstract: In one disclosed embodiment, a mobile unit receives an assigned reverse supplemental channel data rate, for example, as part of a supplemental channel assignment from a base station to the mobile unit in a CDMA spread spectrum communication system. The mobile unit utilizes a profiling table to determine a maximum feasible reverse supplement channel data rate corresponding to a given forward supplemental channel data rate. For example, the profiling table can be constructed by testing the mobile unit to determine what combinations of forward and reverse supplemental channel data rates and operating conditions cause the mobile unit's processor to "crash". The mobile unit communicates data over the reverse supplemental channel at a data rate which does not exceed the maximum feasible reverse supplemental channel data rate, for example, by constructing service data units using filler to lower the communication data rate below the maximum feasible reverse supplemental channel data rate.

Abstract translation: 在一个所公开的实施例中，移动单元例如作为在CDMA扩频通信系统中从基站到移动单元的补充信道分配的一部分来接收所分配的反向补充信道数据速率。 移动单元利用分析表来确定对应于给定的前向补充信道数据速率的最大可行反向补充信道数据速率。 例如，可以通过测试移动单元来确定正向和反向补充信道数据速率和操作条件的组合导致移动单元的处理器“崩溃”的构造表。 移动单元通过反向补充信道以不超过最大可行反向补充信道数据速率的数据速率传送数据，例如通过使用填充来构建服务数据单元，以将通信数据速率降低到最大可行反向补充信道以下 数据速率。

公开(公告)号：WO02045279A2

公开(公告)日：2002-06-06

申请号：PCT/US2001/044688

申请日：2001-11-29

IPC: H04B1/707 ,  H04B7/26 ,  H04L12/56 ,  H04W8/18 ,  H04W24/00 ,  H04W28/22 ,  H04B

CPC classification number: H04W28/22 ,  H04B7/264 ,  H04B2201/70705 ,  H04W8/18 ,  H04W24/00

Abstract: In one disclosed embodiment, a mobile unit receives an assigned reverse supplemental channel data rate, for example, as part of a supplemental channel assignment from a base station to the mobile unit in a CDMA spread spectrum communication system. The mobile unit utilizes a profiling table to determine a maximum feasible reverse supplement channel data rate corresponding to a given forward supplemental channel data rate. For example, the profiling table can be constructed by testing the mobile unit to determine what combinations of forward and reverse supplemental channel data rates and operating conditions cause the mobile unit's processor to "crash". The mobile unit communicates data over the reverse supplemental channel at a data rate which does not exceed the maximum feasible reverse supplemental channel data rate, for example, by constructing service data units using filler to lower the communication data rate below the maximum feasible reverse supplemental channel data rate.

Abstract translation: 在一个所公开的实施例中，移动单元例如作为在CDMA扩频通信系统中从基站到移动单元的补充信道分配的一部分来接收所分配的反向补充信道数据速率。 移动单元利用分析表来确定对应于给定的前向补充信道数据速率的最大可行反向补充信道数据速率。 例如，可以通过测试移动单元来确定正向和反向补充信道数据速率和操作条件的组合导致移动单元的处理器“崩溃”的构造表。 移动单元通过反向补充信道以不超过最大可行反向补充信道数据速率的数据速率传送数据，例如通过使用填充来构建服务数据单元，以将通信数据速率降低到最大可行反向补充信道以下 数据速率。

公开(公告)号：WO01093436A2

公开(公告)日：2001-12-06

申请号：PCT/SE2001/001174

申请日：2001-05-23

IPC: H04B1/7103 ,  H04B1/7107 ,  H04B1/00

CPC classification number: H04B1/7103 ,  H04B1/7107 ,  H04B2201/70705 ,  H04B2201/70707

Abstract: Method and apparatus for minimizing the processing delay incurred by an IC receiver (32) over conventional receivers (20) in a CDMA cellular system are disclosed. The method and apparatus involve operating the conventional receiver (20) and the IC receiver (32) in parallel to each other. Data from the conventional receiver (20) are then used to supplement data from the IC receiver (32) in order to minimize the delays incurred by the IC receiver (32).

Abstract translation: 公开了一种用于最小化CDMA接收机（32）在CDMA蜂窝系统中的常规接收机（20）所引起的处理延迟的方法和装置。 所述方法和装置包括相互并行地操作常规接收器（20）和IC接收器（32）。 然后使用来自常规接收器（20）的数据来补充来自IC接收器（32）的数据，以便最小化由IC接收器（32）引起的延迟。

公开(公告)号：WO0143330A3

公开(公告)日：2001-11-29

申请号：PCT/EP0011874

申请日：2000-11-28

Applicant: NOKIA NETWORKS OY ,  HEINILAE MARKO ,  PARTS UELO

Inventor： HEINILAE MARKO ,  PARTS UELO

IPC: H04B1/707 ,  H04J13/00 ,  H04L25/02 ,  H04L1/00

CPC classification number: H04L25/0262 ,  H04B2201/70705 ,  H04J13/0044

Abstract: The present invention relates to a method and a circuitry for estimating a spreading factor and/or data transmission rate in a communication system that employs variable data transmission rates. A received transmission signal is analysed in order to estimate noise variances for those spreading factors that are possible for a data frame in the signal. The estimate is based on information that is determined by assuming that the smallest possible spreading factor was used for the transmission of the signal. The estimates are then scaled by predefined constants, each of the constants depending on the respective possible spreading factor. The smallest one of the scaled estimates is determined, whereafter the most probable spreading factor of the received data frame is determined based on the smallest variance estimate.

Abstract translation: 本发明涉及一种用于估计采用可变数据传输速率的通信系统中的扩展因子和/或数据传输速率的方法和电路。 分析接收到的发送信号，以便估计信号中的数据帧可能的那些扩频因子的噪声方差。 估计是基于通过假设使用尽可能小的扩展因子来发送信号所确定的信息。 然后通过预定义的常数缩放估计值，每个常数取决于相应的可能扩展因子。 确定缩放估计中最小的估计值，然后基于最小方差估计确定接收数据帧的最可能的扩展因子。

公开(公告)号：WO01050620A1

公开(公告)日：2001-07-12

申请号：PCT/EP2000/012766

申请日：2000-12-15

IPC: H04B1/707 ,  H04Q7/38

CPC classification number: H04B1/707 ,  H04B2201/70705

Abstract: Code Division Multiple Access (CDMA) spreading and despreading techniques eliminate the need for frame-length chip buffers within despreading and demodulation processors in CDMA receivers. According to the invention, successive CDMA frames are transmitted with variable spreading factors and a constant spreading sequence chip rate to provide a variable data throughput rate, each transmitted frame thus including a variable number of data symbols and a variable number of rate indication symbols. During transmission, channelization spreading sequences used for higher data rate frames are guaranteed to be subsets of channelization spreading sequences used for lower data rate frames. Consequently, a CDMA despreading processor according to the invention can despread incoming data symbols as they arrive at a CDMA receiver, storing the resulting symbols to a memory which must exist irrespective of the despreading process (e.g., within a deinterleaver or error detection and correction decoder). For example, incoming chips can be despread using a minimum allowable spreading rate and, upon receiving the rate information symbols included in the incoming frame, a determination can be made as to whether despreading is complete. If it is determined that the frame was spread using the minimum allowable spreading factor, then the stored data symbols are accepted as finally despread data symbols and further reception processing continues directly. Otherwise, the stored data symbols are taken to be temporary symbols which are then combined, using the guaranteed relationships between fast and slow spreading sequences, to generate the finally despread data symbols. Advantageously, a CDMA receiver according to the invention can thus operate successfully without requiring a frame-length despreading chip buffer.

Abstract translation: 码分多址（CDMA）扩展和解扩技术消除了在CDMA接收机中解扩和解调处理器内的帧长度芯片缓冲器的需要。 根据本发明，连续的CDMA帧以可变的扩频因子和恒定的扩展序列码片速率被发送，以提供可变的数据吞吐速率，每个发送的帧因此包括可变数量的数据符号和可变数量的速率指示符号。 在传输期间，用于较高数据速率帧的信道化扩展序列被确保为用于较低数据速率帧的信道化扩展序列的子集。 因此，根据本发明的CDMA解扩处理器可以在输入的数据符号到达CDMA接收机时解扩输入数据符号，将得到的符号存储到必须存在的存储器中，而与解扩处理无关（例如，在解交织器或错误检测和校正解码器 ）。 例如，输入芯片可以使用最小允许扩展速率进行解扩，并且在接收到包括在输入帧中的速率信息符号时，可以确定解扩是否完成。 如果确定使用最小允许扩展因子来扩展帧，则存储的数据符号被接受为最终解扩数据符号，并且进一步的接收处理继续进行。 否则，将所存储的数据符号取为临时符号，然后使用快速和慢速扩展序列之间的保证关系组合，生成最终解扩数据符号。 有利地，根据本发明的CDMA接收机因此可以成功地操作，而不需要帧长度解扩芯片缓冲器。

公开(公告)号：WO01024396A1

公开(公告)日：2001-04-05

申请号：PCT/IB1999/001668

申请日：1999-09-29

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B2201/70705

Abstract: This invention is concerned with the situation where communication between a base station and a mobile station take place over a multirate data channel having a corresponding control channel which is (i) transmitted in parallel with the data channel and which (ii) needs to be adequately decoded to extract control information in order to properly decode the data channel. The invention provides a method of and a system for estimating the spreading factor of data in a channel in a spread spectrum radio communication system comprising a transmitter and a receiver, wherein the transmitter transmits a data unit at one of a plurality of spreading factors over a data channel and transmits in parallel over a control channel a control unit comprising information for decoding said data unit, the method comprising the steps of: decoding an initial portion of the control unit; decoding an initial portion of the data unit at an assumed one of said plurality of spreading factors; and calculating the received power of the initial portions of the control unit and the data unit to make an estimate of the spreading factor used to transmit the data unit.

Abstract translation: 本发明涉及基站和移动台之间的通信是通过具有对应的控制信道的多速率数据信道进行的，所述对应的控制信道是（i）与数据信道并行发送，并且（ii）需要足够的 解码以提取控制信息以便正确解码数据信道。 本发明提供了一种用于估计包括发射机和接收机的扩展频谱无线电通信系统中的信道中的数据的扩展因子的方法和系统，其中，所述发射机以多个扩频因子之一通过一个 数据信道，并且通过控制信道并行发送包括用于解码所述数据单元的信息的控制单元，所述方法包括以下步骤：解码所述控制单元的初始部分; 在假定的所述多个扩展因子之一中对数据单元的初始部分进行解码; 以及计算控制单元和数据单元的初始部分的接收功率，以对用于发送数据单元的扩频因子进行估计。