公开(公告)号：US5894473A

公开(公告)日：1999-04-13

申请号：US608811

申请日：1996-02-29

Applicant: Paul W. Dent

Inventor： Paul W. Dent

IPC: H04J1/00 ,  H04B1/56 ,  H04B7/26 ,  H04J3/00 ,  H04J13/00

CPC classification number: H04J13/00 ,  H04B7/2618 ,  H04B1/56 ,  H04B2201/709727

Abstract: A multiple access communication system and method using Code Division Multiple Access (CDMA) and Time Division Multiple Access (TDMA) comprises coding information signals with CDMA codewords to be transmitted over a common frequency spectrum, time compressing the CDMA codewords for transmission only during allocated timeslots, activating a receiver only during the allocated timeslots to receive and decompress the time compressed CDMA codewords, and decoding the decompressed CDMA codewords to recover the information signals.

Abstract translation: 使用码分多址（CDMA）和时分多址（TDMA）的多址通信系统和方法包括利用CDMA码字对信息信号进行编码，以在公共频谱上传输，仅在分配的时隙期间对CDMA码字进行时间压缩以进行传输 仅在所分配的时隙中激活接收机，以接收和解压缩时间压缩的CDMA码字，以及对解压缩的CDMA码字进行解码以恢复信息信号。

公开(公告)号：US09225386B2

公开(公告)日：2015-12-29

申请号：US11955084

申请日：2007-12-12

Applicant: Ram Asokan

Inventor： Ram Asokan

IPC: H04B17/02 ,  H04B1/06 ,  H04B7/00 ,  H04B1/712 ,  H04B1/7117

CPC classification number: H04B1/712 ,  H04B1/7117 ,  H04B2201/709727

Abstract: An electronic device includes a Rake receiver for receiving wireless signals, wherein the Rake receiver includes a predetermined number of fingers and a combiner. The Rake receiver also includes a channel detection circuit configured to identify at least one channel tap in a received signal, and a placement circuit configured to place a finger of the predetermined number of fingers at a location corresponding to the at least one identified channel tap. If all of the predetermined number of fingers are not associated with a corresponding channel tap, unplaced fingers of the predetermined number of fingers are placed at locations based on a signal-to-interference ratio estimate at an output of the combiner.

Abstract translation: 电子设备包括用于接收无线信号的Rake接收机，其中Rake接收机包括预定数量的指状物和组合器。 Rake接收机还包括被配置为识别接收信号中的至少一个信道抽头的信道检测电路，以及配置为将预定数量的指状物的手指放置在与至少一个识别的信道抽头相对应的位置处的放置电路。 如果所有预定数量的手指不与对应的通道抽头相关联，则基于在组合器的输出处的信号干扰比估计，预定数量的手指的未放置的手指放置在位置。

公开(公告)号：US20140198829A1

公开(公告)日：2014-07-17

申请号：US14238896

申请日：2011-08-17

Applicant: Henrik Egnell ,  Nina Blom

Inventor： Henrik Egnell ,  Nina Blom

IPC: H04B1/7117 ,  H04B1/709

CPC classification number: H04B1/7117 ,  H04B1/709 ,  H04B1/7115 ,  H04B1/712 ,  H04B2201/709727

Abstract: The invention relates to the field of radio signal receivers for use in wireless communication networks. In particular to a receiver unit having at least one antenna input for receiving multipath radio signals via a radio unit and at least one antenna from one or more user equipments is provided. The receiver unit comprises: a despreading unit configured to despread a multipath radio signal in the received multipath radio signals using a number of despreading fingers corresponding to a number of delay positions in the multipath radio signal which corresponds to a number of paths in the multipath radio signal, and a combining unit configured to apply at least one weight to the output of each of the number of allocated despreading fingers and combine the weighted outputs into a resulting equalized radio signal. The receiver unit is characterised in that it is configured to calculate auto-correlation values based on all multipath radio signals received at the at least one antenna input, determine at least one auto-correlation value based on the calculated auto-correlation values, determine at least one time value based on the at least one determined auto-correlation value, and allocate at least one interference suppression finger to a delay position in the multipath radio signal based on the at least one determined time value. The invention further relates to a receiver, a network node and a method for suppressing interference in a received multipath radio signal in a receiver unit.

Abstract translation: 本发明涉及用于无线通信网络的无线电信号接收机领域。 特别涉及一种具有至少一个天线输入的接收机单元，用于经由无线电单元接收多径无线电信号，并提供来自一个或多个用户设备的至少一个天线。 接收机单元包括：解扩单元，被配置为使用与多径无线电信号中的多个延迟位置相对应的多个解扩手指来解扩所接收的多路径无线电信号中的多路径无线电信号，该多路径无线电信号对应于多路径无线电 信号和组合单元，其被配置为将至少一个权重应用于所分配的解扩手指数中的每一个的输出，并将加权输出组合成所得到的均衡无线电信号。 接收机单元的特征在于，其被配置为基于在至少一个天线输入处接收的所有多径无线电信号来计算自相关值，基于所计算的自相关值确定至少一个自相关值， 基于所述至少一个确定的自相关值的至少一个时间值，并且基于所述至少一个确定的时间值，将至少一个干扰抑制手指分配给所述多径无线电信号中的延迟位置。 本发明还涉及一种接收机，网络节点和一种用于抑制接收机单元中接收到的多路径无线电信号中的干扰的方法。

公开(公告)号：US08781011B2

公开(公告)日：2014-07-15

申请号：US12036323

申请日：2008-02-25

Applicant: Stephen J. Grant

Inventor： Stephen J. Grant

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04B7/0417 ,  H04B1/712 ,  H04B2201/709727

Abstract: A model-based technique for estimating signal impairments that can accommodate various transmitted signal configurations, including closed-loop transmit diversity signals and pre-coded MIMO signals, is disclosed. In an exemplary method, an impairment model is constructed for a received composite information signal comprising at least a first data stream transmitted from first and second antennas according to a first antenna weighting vector. The impairment model includes one or more model terms scaled by corresponding scaling parameters, wherein the model terms capture propagation channel effects and are independent of the first antenna weighting vector, and wherein the scaling parameters capture effects of the first antenna weighting vector. A parametric estimate of the impairment covariance is calculated using the impairment model.

Abstract translation: 公开了一种用于估计可以适应各种发射信号配置的信号损伤的基于模型的技术，包括闭环发射分集信号和预编码的MIMO信号。 在一个示例性方法中，针对接收的复合信息信号构建损伤模型，所述复合信息信号包括根据第一天线加权向量从第一和第二天线发送的至少第一数据流。 所述损伤模型包括由相应的缩放参数缩放的一个或多个模型项，其中所述模型项捕获传播信道效应，并且独立于所述第一天线加权矢量，并且其中所述缩放参数捕获所述第一天线加权矢量的效果。 使用损伤模型计算损伤协方差的参数估计。

公开(公告)号：US08750407B2

公开(公告)日：2014-06-10

申请号：US12239889

申请日：2008-09-29

Applicant: Jung-Fu Cheng ,  Tracy Fulghum ,  Douglas Cairns

Inventor： Jung-Fu Cheng ,  Tracy Fulghum ,  Douglas Cairns

IPC: H04L27/00

CPC classification number: H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

Abstract: A transmitter, channel coder, and method for coding and transmitting a sequence of symbols in a digital communication system utilizing soft pilot symbols. In one embodiment, the transmitter transmits a set of soft pilot symbols with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16 QAM or 64 QAM. The transmitter shares the modulation type and location (time/frequency/code) of the soft pilot symbols with a receiver. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols. In another embodiment, soft pilot symbols are inserted by low-level puncturing of channel encoded bits and replacing the punctured bits with known bit patterns.

Abstract translation: 用于使用软导频符号在数字通信系统中对符号序列进行编码和发送的发射机，信道编码器和方法。 在一个实施例中，发射机通过用低阶调制（诸如BPSK或QPSK）调制软导频符号，以较高阶调制方式调制剩余符号，从而发送具有比序列中的剩余符号更高的可靠性的一组软导频符号， 作为16 QAM或64 QAM。 发射机与接收机共享软导频符号的调制类型和位置（时间/频率/码）。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。 在另一个实施例中，通过信道编码比特的低级删截插入软导频符号，并用已知的比特模式替换被删余的比特。

公开(公告)号：US08670497B2

公开(公告)日：2014-03-11

申请号：US13253412

申请日：2011-10-05

Applicant: Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang ,  Karl Molnar ,  Jung-Fu Cheng

Inventor： Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang ,  Karl Molnar ,  Jung-Fu Cheng

IPC: H04B7/02

CPC classification number: H04B1/712 ,  H04B1/7103 ,  H04B1/7105 ,  H04B1/71055 ,  H04B1/7107 ,  H04B1/71072 ,  H04B7/04 ,  H04B7/0684 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0048 ,  H04L1/18 ,  H04L25/021 ,  H04L25/0224 ,  H04L25/03012 ,  H04L25/03318 ,  H04L25/03331 ,  H04W52/16 ,  H04W52/325 ,  H04W52/346 ,  H04W52/42

Abstract: A wireless communication receiver improves signal impairment correlation estimation in MIMO/MISO systems by considering different transmit power allocations and different transmit antenna power distributions in its impairment correlation calculations. The receiver may be implemented in according to a variety of architectures, including, but not limited to, Successive Interference Cancellation (SIC) Generalized RAKE (G-RAKE), Joint Detection (JD) G-RAKE, and Minimum Mean Squared Error (MMSE) G-RAKE. Regardless of the particular receiver architecture adopted, the improved impairment correlations may be used to calculate improved (RAKE) signal combining weights and/or improve channel quality estimates for reporting by receivers operating in Wideband CDMA (W-CDMA) systems transmitting HSDPA channels via MIMO or MISO transmitters. A transmitter may be configured to facilitate impairment correlation determinations by wireless communication receivers operating in MIMO/MISO environments, by signaling one or more values, e.g., data-to-pilot signal transmit power ratios and/or transmit antenna power distributions for the data and pilot signals.

Abstract translation: 无线通信接收机通过在损伤相关计算中考虑不同的发射功率分配和不同的发射天线功率分布来改善MIMO / MISO系统中的信号损害相关估计。 接收机可以根据各种架构来实现，包括但不限于连续干扰消除（SIC）广义RAKE（G-RAKE），联合检测（JD）G-RAKE和最小均方误差（MMSE） ）G-RAKE。 不考虑所采用的特定接收机架构，改进的损害相关可以用于计算改进的（RAKE）信号组合权重和/或改善用于在通过MIMO发送HSDPA信道的宽带CDMA（W-CDMA）系统中操作的接收机报告的信道质量估计 或MISO发射机。 发射机可以被配置为通过信令一个或多个值（例如数据到导频信号发射功率比和/或数据的发射天线功率分布）来促进在MIMO / MISO环境中操作的无线通信接收机的损害相关确定，以及 导频信号。

公开(公告)号：US08605842B2

公开(公告)日：2013-12-10

申请号：US13376908

申请日：2009-06-11

Applicant: Karl Torbjörn Wigren

Inventor： Karl Torbjörn Wigren

IPC: H03D1/04

CPC classification number: H04B1/712 ,  H04B1/7103 ,  H04B17/345 ,  H04B2201/709727

Abstract: A method for noise rise estimation in a wireless communication system comprises measuring (210) of received total wideband power a plurality of times and computing (212) of an estimate of a noise floor measure based on at least a number of the measured received total wideband powers. The method further comprises performing (214) of an interference whitening based on one of GRAKE, GRAKE+ and chip equalizer for a first user and determining (216) of a user equivalent total wideband power as an available total wideband power after the interference whitening for the first user. The estimate of a noise floor measure is compensated (218) for the interference whitening into a user equivalent noise floor measure and a noise rise measure for the first user is calculated (220) based at least on the user equivalent total wideband power and the user equivalent noise floor measure.

Abstract translation: 一种用于无线通信系统中的噪声上升估计的方法包括：多次测量（210）所接收的总宽带功率，并基于所测量的接收总宽带的至少一个数量，计算（212）噪声本底测量的估计值 权力。 该方法还包括基于第一用户的GRAKE，GRAKE +和码片均衡器之一执行（214）干扰白化，并且确定（216）用户等效总宽带功率作为对于所述干扰增白的可用总宽带功率 第一个用户 噪声本底测量的估计被补偿（218）用于干扰白化到用户等效噪声基底测量中，并且至少基于用户等效总宽带功率和用户来计算第一用户的噪声上升测量（220） 等效噪音测量。

公开(公告)号：US08599972B2

公开(公告)日：2013-12-03

申请号：US10869456

申请日：2004-06-16

Applicant: Gregory Edward Bottomley ,  Carmela Cozzo

Inventor： Gregory Edward Bottomley ,  Carmela Cozzo

IPC: H03D1/00

CPC classification number: H04B1/712 ,  H04B17/309 ,  H04B2201/709727

Abstract: A method and apparatus removes bias from an initial signal-to-interference ratio (SIR). In an exemplary embodiment, an initial SIR calculator in an SIR processor calculates the initial SIR based on the signal received by the wireless receiver, while an average SIR calculator in the SIR processor generates an average SIR. Using the average SIR, a bias remover removes the bias from the initial SIR.

Abstract translation: 一种方法和装置从初始信号干扰比（SIR）中去除偏差。 在示例性实施例中，SIR处理器中的初始SIR计算器基于由无线接收机接收的信号来计算初始SIR，而SIR处理器中的平均SIR计算器产生平均SIR。 使用平均SIR，偏移去除器从初始SIR中去除偏差。

公开(公告)号：US20130287066A1

公开(公告)日：2013-10-31

申请号：US13927199

申请日：2013-06-26

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Anders Wallén

IPC: H04B1/10

CPC classification number: H04B1/10 ,  H04B2201/709727 ,  H04L1/20 ,  H04L2027/0065

Abstract: A receiver circuit provides improved noise estimation processing by at least partially removing receiver frequency error bias. An initial noise estimate is compensated using an error term based on the observed receiver frequency error, and the resulting compensated noise estimate can be used to improve other signal processing in the receiver. For example, the receiver may use compensated noise estimates to generate signal quality estimates, e.g., Signal-to-Interference (SIR) estimates, having improved accuracy. Additionally, or alternatively, the receiver may use the compensated noise estimates to generate RAKE combining weights having improved noise suppression characteristics. In an exemplary embodiment, the initial noise estimate is a noise correlation matrix generated from a received reference signal, e.g., pilot symbols, and the error term is an error matrix directly generated using the observed receiver frequency error and channel estimates taken from the reference signal.

Abstract translation: 接收机电路通过至少部分地去除接收机频率误差偏差来提供改进的噪声估计处理。 使用基于观察到的接收机频率误差的误差项来补偿初始噪声估计，并且所得到的补偿噪声估计可以用于改善接收机中的其他信号处理。 例如，接收机可以使用经补偿的噪声估计来产生具有提高的精度的信号质量估计，例如信号干扰（SIR）估计。 另外或替代地，接收机可以使用经补偿的噪声估计来生成具有改进的噪声抑制特性的RAKE组合权重。 在示例性实施例中，初始噪声估计是从接收的参考信号（例如，导频符号）产生的噪声相关矩阵，并且误差项是使用观测到的接收机频率误差和从参考信号获取的信道估计直接生成的误差矩阵 。

公开(公告)号：US08498325B2

公开(公告)日：2013-07-30

申请号：US12016608

申请日：2008-01-18

Applicant: Gregory E. Bottomley ,  Yi-Pin Eric Wang

Inventor： Gregory E. Bottomley ,  Yi-Pin Eric Wang

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: The teachings presented herein improve the processing of individual signals of interest included in a received composite signal by computing combining weights and/or signal quality estimates for each signal of interest, e.g., for linear equalization, based on either shared or non-shared correlation estimates. As a non-limiting advantage, the use of shared correlation estimates reduces computational loading as compared to the processing load that would be needed for computing non-shared correlation estimates for all signals of interest. As a further non-limiting advantage, the conditional use of shared and non-shared correlation estimates provides for the use of non-shared correlation estimates where signal characteristic(s) of one or more of the signals of interest warrant such usage, e.g., for one or more high-rate signals of interest.

Abstract translation: 本文提出的教导通过基于共享或非共享相关估计来计算每个感兴趣信号的组合权重和/或信号质量估计，例如用于线性均衡，来改进包括在接收到的复合信号中的感兴趣的各个信号的处理 。 作为非限制性优点，与用于计算所有感兴趣的信号的非共享相关估计所需的处理负载相比，共享相关估计的使用减少了计算负载。 作为进一步的非限制性优点，共享和非共享相关估计的条件使用提供了使用非共享相关估计，其中一个或多个感兴趣信号的信号特征允许这种使用，例如， 用于一个或多个感兴趣的高速率信号。