公开(公告)号：US20040047284A1

公开(公告)日：2004-03-11

申请号：US10389272

申请日：2003-03-14

Inventor： Donald Brian Eidson

IPC: H04J011/00

CPC classification number: H04B7/0865 ,  H04B7/0669 ,  H04L1/0618 ,  H04L27/2607

Abstract: Systems and techniques are disclosed for framing and processing single-carrier and/or OFDM transmit-diversity transmissions through delay-spread channels, as well as for deframing and processing the corresponding merged signals, received from a plurality of antennas, to estimate the transmitted information. Time-domain processing techniques may be used for both types of transmissions to create multiplexed dual signal-unit pairs, particularly when cyclic prefixes are needed to reduce delay-spreading effects. Repetitive pilot words may be employed in burst preambles and/or in payloads of transmission bursts to minimize or provide flexibility in the amount of bandwidth that is consumed to generate good channel response estimates under changing channel conditions.

Abstract translation: 公开了用于通过延迟扩展信道对单载波和/或OFDM发射分集传输进行成帧和处理的系统和技术，以及用于对从多个天线接收的对应的合并信号进行解帧和处理，以估计所传送的信息 。 时域处理技术可以用于两种类型的传输以产生多路复用双信号单元对，特别是当需要循环前缀以减少延迟扩展效应时。 可以在突发前导码和/或传输脉冲串的有效载荷中采用重复导频字，以便在改变信道条件下产生良好信道响应估计所消耗的带宽量的最小化或提供灵活性。

公开(公告)号：US20040017309A1

公开(公告)日：2004-01-29

申请号：US10346906

申请日：2003-01-17

Inventor： George P. Bortnyk ,  David J. Lupia

IPC: G01S007/285

CPC classification number: H04B7/0857 ,  H04B7/084 ,  H04B7/0865 ,  H04B7/0871 ,  H04B7/10 ,  H04B7/12

Abstract: Combining signals includes receiving first signals having a first frequency and second signals having a second frequency. A first weight reflecting a signal-to-noise ratio associated with a first signal is determined for each first signal, and a first signal output is generate from the first signals in accordance with the first weights. A second weight reflecting a signal-to-noise ratio associated with a second signal is determined for each second signal, and a second signal output is generate from the second signals in accordance with the second weights. The first signal output and the second signal output are combined to yield a combined signal output.

公开(公告)号：US20030091130A1

公开(公告)日：2003-05-15

申请号：US10204931

申请日：2002-10-15

Inventor： Kazuhiko Terashima ,  Taku Nagase ,  Makoto Natori

IPC: H04L027/06

CPC classification number: H04B7/0865 ,  H04B1/707 ,  H04B7/0848 ,  H04B7/0857 ,  H04B2201/70701 ,  H04L1/06

Abstract: The present invention provides a receiving apparatus and a receiving method in which frequency of calculation such as weighting multiplication can be reduced and memory capacity of a frame buffer can be reduced. To this end, reference phase information and data are separated by a reference phase inverse spreading unit (106) and a data portion inverse spreading unit (107), respectively. A weighting coefficient calculating unit (115) calculates weighting coefficients based on SNR values as transmission line information from an SNR calculating unit (114), and sends thus calculated weighting coefficients to a multiplier (109) where phase correction values based on the reference phase information are multiplied by the weighting coefficients to be correction coefficients. A multiplier (111) multiplies reception data from the data portion inverse spreading unit (107) by the correction coefficients, and output data from the multiplier (111) is restricted in bit width by the bit width restricting unit (112). Output data which is restricted in bit width from a coherent receiving unit (101) and that of a coherent receiving unit (121) are added by an adder (117), and output data from the adder (117) is sent to a frame buffer (118) to be stored. Then, output data from the frame buffer (118) is sent to a soft decision input error correcting unit (120).

Abstract translation: 本发明提供了一种接收装置和接收方法，其中可以减少诸如加权乘法的计算频率，并且可以减少帧缓冲器的存储容量。 为此，参考相位信息和数据分别由参考相位逆扩展单元（106）和数据部分反扩频单元（107）分开。 加权系数计算单元（115）根据SNR值作为来自SNR计算单元（114）的传输线信息计算加权系数，并将这样计算的加权系数发送到乘法器（109），其中基于参考相位信息的相位校正值 被加权系数乘以校正系数。 乘法器（111）将来自数据部分反向扩展单元（107）的接收数据乘以校正系数，乘法器（111）的输出数据由位宽度限制单元（112）限制在位宽。 由相加接收单元（101）和相干接收单元（121）的位宽限制的输出数据由加法器（117）相加，并将来自加法器（117）的输出数据发送到帧缓冲器 （118）被存储。 然后，将来自帧缓冲器（118）的输出数据发送到软判决输入错误校正单元（120）。

公开(公告)号：US20030045313A1

公开(公告)日：2003-03-06

申请号：US10115470

申请日：2002-04-03

Inventor： Takanori Iwamatsu ,  Masayuki Sutoh ,  Yasuharu Amezawa ,  Shinichi Sato

IPC: H04B007/00

CPC classification number: H04B7/0865

Abstract: In a mobile communication receiving apparatus in which signals received on a plurality of receiving paths (branches) are combined by a combiner, correlation between noise signals contained in the signals received on respective ones of the branches is detected by a noise correlation calculating unit, and control is exercised so as to maximize signal-to-noise power ratio of the combined signal based upon the correlation calculated in the noise correlation calculating unit. Signal-to-noise power ratio can be maximized even if noise components contained in respective ones of the branch signals are mutually correlated.

Abstract translation: 在通过组合器组合在多个接收路径（分支）上接收的信号的移动通信接收装置中，通过噪声相关计算单元检测在各个分支上接收的信号中包含的噪声信号之间的相关性， 基于在噪声相关计算单元中计算出的相关性，进行控制以便最大化组合信号的信噪比功率比。 即使各分支信号中包含的噪声分量相互相关，也可以使信噪比功率比最大化。

公开(公告)号：US20030035498A1

公开(公告)日：2003-02-20

申请号：US09916685

申请日：2001-07-27

Inventor： Junsong Li ,  Yui-Luen Ho

IPC: H03K009/06

CPC classification number: H04B7/0871 ,  H04B7/084 ,  H04B7/0865 ,  H04B7/0891

Abstract: Embodiments of the present invention relate generally to receivers. One embodiment relates to a digital FM receiver having multiple sensors (e.g. antennas). In one embodiment, the digital receiver includes a baseband unit having a channel processing unit. In one embodiment, the channel processing unit is capable of calculating or estimating a phase difference between the incoming signals prior to combining them. One embodiment uses phase estimation method for diversity combining the signals while another embodiment utlizes a hybrid phase lock loop method. Also, some embodiments of the present invention provide for echo-cancelling after diversity combining. An alternate embodiment of the channel processing unit utilizes a space-time unit to diversity combine and provide echo cancelling for the incoming signals. Other embodiments of the present invention allow for the incoming signals from the multiple antennas to pass through the baseband unit uncombined, where the incoming signals may have different data formats.

公开(公告)号：US06188352B1

公开(公告)日：2001-02-13

申请号：US09214066

申请日：1999-05-06

Applicant: Seung Won Choi ,  Hyeong Bae Lee

Inventor： Seung Won Choi ,  Hyeong Bae Lee

IPC: G01S316

CPC classification number: H04B7/0865 ,  H01Q3/26

Abstract: This invention provides a signal processing method for enhancing the communication quality and increasing the communication capacity by reducing the effects of interference and noises with the nice beam pattern. The signal processing method provides a beam pattern by computing an eigenvector corresponding to the maximum eigenvalue of an autocorrelation matrix of received signals in an antenna array system. The inventive signal processing method introduces a simplified computational technique for generating a nice beam pattern having its maximum gain along the direction of the wanted signal and maintaining the gain toward the direction of the interfering signals in as low a level as possible.

Abstract translation: 本发明提供了一种信号处理方法，用于通过减少干扰和噪声对漂亮的波束图形的影响来提高通信质量并增加通信容量。 信号处理方法通过计算与天线阵列系统中的接收信号的自相关矩阵的最大特征值相对应的特征向量来提供波束图案。 本发明的信号处理方法引入简化的计算技术，用于产生沿有用信号的方向具有最大增益的漂亮波束图案，并将增益朝向干扰信号的方向保持在尽可能低的水平。

公开(公告)号：US6118806A

公开(公告)日：2000-09-12

申请号：US320680

申请日：1999-05-27

Applicant: Sumaru Niida ,  Toshinori Suzuki

Inventor： Sumaru Niida ,  Toshinori Suzuki

IPC: H04J13/00 ,  H04B1/7115 ,  H04B7/02 ,  H04B7/08 ,  H04L1/02 ,  H04L1/06 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC classification number: H04B1/712 ,  H04B7/0865 ,  H04L1/06

Abstract: An apparatus for combining signals includes RAKE receivers 10, 20, noise-power measuring apparatuses 30, 40, and a branch combiner 50. The RAKE receivers 10, 20 are the same in number as the antenna branches, and each RAKE receiver combines received signals by using a weight based on an amplitude of each received signal. Each of the noise-power measuring apparatus 30, 40 measures a sum of an interference power and a background-noise power in an output signal from each RAKE receiver. The branch combiner 50 multiplies the output signal from each RAKE receiver by an inverse of the sum measured by the noise-power measuring apparatus, and then adds up the value obtained by each multiplication.

Abstract translation: 用于组合信号的装置包括RAKE接收机10,20，噪声功率测量装置30,40和分支组合器50.RAW接收机10,20的数量与天线分支相同，并且每个RAKE接收机组合接收信号 通过使用基于每个接收信号的振幅的权重。 每个噪声功率测量装置30,40测量来自每个RAKE接收机的输出信号中的干扰功率和背景噪声功率之和。 分支组合器50将来自每个RAKE接收机的输出信号乘以由噪声功率测量装置测量的和的倒数，然后将通过每次相乘得到的值相加。

公开(公告)号：US5933466A

公开(公告)日：1999-08-03

申请号：US808027

申请日：1997-03-03

Applicant: Shoichi Oshima ,  Manabu Ishibe

Inventor： Shoichi Oshima ,  Manabu Ishibe

IPC: H03G3/30 ,  H04B7/08 ,  H04L1/02 ,  H04B1/06 ,  H04B17/02

CPC classification number: H04B7/0857 ,  H03G3/3036 ,  H03G3/3042 ,  H04B7/0865

Abstract: The present invention is directed to a radio communications apparatus with combining diversity in which received radio signals are weighted appropriately to reduce an error in demodulation and improve in communication quality. In the signal combining diversity radio communications apparatus, the digital reception signals of an intermediate frequency, output from the reception circuit, are demodulated by demodulation circuits into digital demodulation signals of the baseband. The digital demodulation signals are input to the multiplication circuits. The multiplication circuits multiply the digital demodulation signals by the weight coefficients, which are generated by weight coefficient generation circuits and corresponding to the digital demodulation signals, based on C/N ratio detection signals, in order to weight the digital demodulation signals. The weighted demodulation signals are added together by a digital addition circuit. Consequently, the received signals can be weighted appropriately to thereby improve in communication quality.

Abstract translation: 本发明涉及具有组合分集的无线电通信装置，其中适当地加权接收的无线电信号以减少解调中的误差并提高通信质量。 在信号合成分集无线电通信装置中，从接收电路输出的中频数字接收信号由解调电路解调为基带的数字解调信号。 数字解调信号被输入到乘法电路。 为了对数字解调信号进行加权，乘法电路根据C / N比检测信号，将数字解调信号乘以由权重系数产生电路产生并对应于数字解调信号的权重系数。 加权解调信号由数字加法电路相加在一起。 因此，可以适当地加权接收的信号，从而提高通信质量。

公开(公告)号：US5930305A

公开(公告)日：1999-07-27

申请号：US606240

申请日：1996-02-23

Applicant: Harry Leib

Inventor： Harry Leib

IPC: H04B1/7115 ,  H04B1/712 ,  H04B7/08 ,  H04B7/26 ,  H04L27/22 ,  H03D3/22

CPC classification number: H04B1/7115 ,  H04B7/0865 ,  H04B1/712

Abstract: For combining diversity path signals comprising symbols each modulated in accordance with one of a plurality of orthogonal (e.g. Walsh) functions, a diversity combiner includes, for each path, a demodulator to demodulate each modulated signal symbol in accordance with a selected one of the orthogonal functions, a phase estimator to estimate a phase rotation and amplitude of the diversity path signal from the demodulated signal, and a complex signal multiplier to derotate the phase and weight the amplitude of the diversity path modulated signal in dependence upon the estimated phase rotation and amplitude. The combiner sums real parts of the phase-derotated and weighted modulated signals of the diversity paths, demodulates the combined signal in accordance with all of the orthogonal functions, and selects the maximum demodulated signal for each symbol thereby to determine for the symbol the selected one of the orthogonal functions.

Abstract translation: 为了组合分集路径信号，包括根据多个正交（例如沃尔什）功能中的一个调制的符号的分量路由信号，分集组合器对于每个路径包括解调器，以根据所选择的正交 函数，用于估计来自解调信号的分集路径信号的相位旋转和幅度的相位估计器，以及复数信号乘法器，用于根据估计的相位旋转和幅度来旋转相位和加权分集路径调制信号的幅度 。 组合器对分集路径的相位扭曲和加权调制信号的实部进行求和，根据所有正交函数对组合信号进行解调，并为每个符号选择最大解调信号，从而确定符号所选择的一个 的正交函数。

公开(公告)号：US5901187A

公开(公告)日：1999-05-04

申请号：US82582

申请日：1998-05-21

Applicant: Toshinori Iinuma

Inventor： Toshinori Iinuma

IPC: H04B7/08

CPC classification number: H04B7/0865

Abstract: A diversity reception device which weights in proportion to the reception level and combines a plurality of reception signals, includes a phase demodulator for demodulating the phase of the reception signal, a converter to output the sine and cosine elements of the reception signal, a sine element adder to add up sine element of each reception signal, and a cosine element adder to add up cosine element of each reception signal. The converter fetches and outputs predetermined values on sine and cosine elements of the reception signal upon input of the reception signal's reception level and phase data that is sent from phase demodulator. Therefore, the present device does not require expensive electronic circuits and can be made of small digital circuits suitable for IC including a memory.