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    • 31. 发明授权
    • 광대역FFT채널라이저
    • KR100366751B1
    • 2003-04-10
    • KR1019960705589
    • 1995-03-13
    • 에어네트 커뮤니케이션즈 코포레이션
    • 카니로널드알.윌리엄스테리엘.
    • H04J4/00H03H17/02
    • H04B1/0014H04J1/05
    • A physically compact, multichannel wireless communication transceiver architecture employs overlap and add or polyphase signal processing functionality, for wideband signal processing, together with a sample rate. A receiver section receives a plurality of multiple frequency communication channels and outputs digital signals representative of the contents of the plurality of multiple frequency communication channels. The receiver section contains an FFT-based channelizer that processes the digital signals output by a wideband digital receiver and couples respective channel outputs to a first plurality of digital signal processor units, which process (e.g. demodulate) respective ones of the digital channel signals and supply processed ones of the digital channel signals at respective output ports for distribution to an attendant voice/data network. On the transmit side, a transmit section contains a plurality of digital signal processors, respectively associated with respective ones of a plurality of incoming (voice/data) communication signals to be transmitted over respectively different frequency channels. Their processed (modulated, encoded) outputs are supplied to an inverse FFT combiner. The FFT combiner supplies a combined multichannel signal to a wideband transmitter which transmits a multiple frequency communication channel signal. Each of the channelizer and combiner may be implemented using overlap and add or polyphase filtering.
    • 物理紧凑的多通道无线通信收发器体系结构采用重叠和增加或多相信号处理功能,用于宽带信号处理以及采样率。 接收器部分接收多个多频率通信信道并输出表示多个多频率通信信道的内容的数字信号。 接收器部分包含基于FFT的信道器,其处理由宽带数字接收器输出的数字信号并将相应的信道输出耦合到第一多个数字信号处理器单元,该第一多个数字信号处理器单元处理(例如解调)各个数字信道信号并提供 在相应的输出端口处处理一些数字信道信号,以便分配给伴随的话音/数据网络。 在发送侧,发送部分包含多个数字信号处理器,分别与要在不同的频率信道上发送的多个输入(话音/数据)通信信号中的各个信号相关联。 他们的处理(调制,编码)输出提供给一个逆FFT组合器。 FFT组合器将组合的多信道信号提供给发送多频率通信信道信号的宽带发射机。 信道器和组合器中的每一个可以使用重叠和增加或多相滤波来实现。
    • 32. 发明公开
    • 신호 변환 방법 및 장치
    • 信号变换方法和装置
    • KR1020000048626A
    • 2000-07-25
    • KR1019997002567
    • 1997-09-19
    • 텔레폰악티에볼라겟엘엠에릭슨(펍)
    • 시그넬스반테쉬에르도스텐
    • H04L5/06
    • H04J1/05H03H17/0202H04L5/06
    • PURPOSE: A signal transformation method and apparatus is provided to decrease amount of datum need in a modulation process and a demodulation process in using a digital wideband signal when a wireless high frequency at the wideband is transmitted and received, an A/D transformer is required to devide a channel. CONSTITUTION: A received signal is amplified at a antenna and through passing by a band pass filter the signal is transformed to a digital real wideband signal with an A/D converter. A step of dividing, a channel or channel group provides the digital wideband signal to a demodulator and at that moment I(in-phase) and orthogonal element(Q) required a low pass filtering and a sampling seed decrease with a down sampler , and then I(in-phase) and orthogonal element(Q) have the process of low pass filtering to devide a desirable channel and channel group from a adjacent unnecessary channel and finally the sample signal is extracted.
    • 目的:提供一种信号变换方法和装置,用于在发送和接收宽带的无线高频时,在调制过程中使用数字宽带信号时的基准需求量和解调处理,需要A / D变换器 转移频道。 构成:接收到的信号在天线放大,通过带通滤波器,信号通过A / D转换器转换成数字实际宽带信号。 分频步骤,信道或信道组向解调器提供数字宽带信号,此时I(同相)和正交分量(Q)需要低通滤波和采样种子随下采样器减少, 那么I(同相)和正交元素(Q)具有低通滤波处理,从相邻的不必要信道中分离出期望的信道和信道组,最后提取采样信号。
    • 39. 发明申请
    • 分波装置、合波装置、通信装置および中継衛星
    • 多路复用器,解复用器,通信设备和继电器卫星
    • WO2010064485A1
    • 2010-06-10
    • PCT/JP2009/067083
    • 2009-09-30
    • 三菱電機株式会社藤村 明憲曽我部 靖志
    • 藤村 明憲曽我部 靖志
    • H04J1/00H03H17/02
    • H03H17/0664H04J1/05
    •  周波数変換を実施後に高周波成分を除去した信号をダウンサンプリングして出力するFC+RXHBF12をn段に2 n 個ずつ備え、複数の帯域信号が含まれる入力信号を、帯域信号を抽出することにより分波する分波装置であって、帯域信号の帯域および周波数配置を含むチャネル情報に基づいて、周波数軸上の分割位置と周波数変換量を示す周波数オフセット値とを求め、求めた値をその分割信号を出力の対象とするFC+RXHBF12に指示する受信フィルタバンク制御部2、を備えFC+RXHBF12は、前記周波数オフセット値に基づいて周波数変換を実施することを特徴とする。
    • 提供了包括2n个FC + RXHBF(12)的解复用器,用于对输出进行下采样,通过在执行频率转换之后去除高频分量而获得的信号。 解复用器通过提取频带信号来解复用包含多个频带信号的输入信号。 解复用器配备有接收滤波器组控制单元(2),该接收滤波器组控制单元(2)根据包含频带信号和频率布置的频带的信道信息获得频率轴上的分割位置和指示频率转换量的频率偏移值,并且 将获得的值报告给输出除法信号的FC + RXHBF(12)。 FC + RXHBF(12)根据频率偏移值执行频率转换。
    • 40. 发明申请
    • AUTOMATIC GAIN CONTROL FOR IMPROVED DECODING OF MULTI-CARRIER SIGNAL
    • 自动增益控制,用于改进多载波信号的解码
    • WO00077971A1
    • 2000-12-21
    • PCT/US2000/016159
    • 2000-06-12
    • H03G3/30H04B14/04H04J1/00H04J1/05H04L5/06H04B1/28H04B7/005
    • H04J1/05H03G3/3052H04L5/06
    • The circuit has an input signal which is filtered with a first filter having a bandwidth greater than a bandwidth of the desired signal. The filtered signal is then sampled to generate discrete time samples, which is then filtered with a discrete time matched filter. The filtered samples are then scaled with a scaling factor and quantized. A quantity related to an amplitude of the quantized samples is measured, and the scaling factor is adjusted in accordance with the measured quantity. The quantized samples can be further processed and provided to a decoder. The desired signal can be a quadrature modulated signal. The adjustment of the scaling factor can be performed by an automatic gain control (AGC) loop that compares the measured signal power of the quantized samples against a predetermined value to generate error values. The AGC loop then filters the error values to generate the scaling factor.
    • 该电路具有用具有大于所需信号的带宽的带宽的第一滤波器滤波的输入信号。 然后对经滤波的信号进行采样以产生离散时间样本,然后用离散时间匹配滤波器过滤。 然后将经过滤的样品用比例因子缩放并量化。 测量与量化样品的幅度相关的量,并根据测量量调整比例因子。 量化的样本可以进一步处理并提供给解码器。 所需信号可以是正交调制信号。 可以通过自动增益控制(AGC)循环来执行缩放因子的调整,其将量化样本的测量信号功率与预定值进行比较以产生误差值。 然后,AGC环路对误差值进行滤波以生成比例因子。