OCQPSK modulator and modulating method using 1-bit input FIR filter
    1.
    发明授权
    OCQPSK modulator and modulating method using 1-bit input FIR filter 有权
    OCQPSK调制器和使用1位输入FIR滤波器的调制方法

    公开(公告)号:US06819708B1

    公开(公告)日:2004-11-16

    申请号:US09716185

    申请日:2000-11-17

    IPC分类号: H04B169

    CPC分类号: H04L27/2071

    摘要: A modulator for an IMT-2000 synchronous mobile station in a digital telecommunication and modulating method thereof, and more particularly, an OCQPSK modulator using FIR filters, each for performing 1:4 interpolation operations for 4 input data and a modulating method thereof. The orthogonal complex quadrature phase shift keying OCQPSK modulating apparatus uses a 1-bit input FIR filter that includes pseudo noise spreading for bifurcating 1-bit data inputted from input channels and pseudo-spreading the bifurcated 1-bit data, an FIR filter for receiving the 1-bit data and performing a filtering operation for pulse shaping, a gain multiplying block for multiplying filtered data outputted from the FIR filter by a gain for respective channels, and a channel adder block for adding data outputted from the gain multiplying block to output I channel and Q channel signals.

    摘要翻译: 一种用于数字电信中的IMT-2000同步移动台的调制器及其调制方法,更具体地,涉及使用FIR滤波器的OCQPSK调制器,每个用于对4个输入数据进行1:4插值运算及其调制方法。 正交复数正交相移键控OCQPSK调制装置使用包括伪噪声扩展的1比特输入FIR滤波器,用于对从输入通道输入的1比特数据进行分叉,并对分叉的1比特数据进行伪扩展; FIR滤波器,用于接收 1位数据并执行用于脉冲整形的滤波操作,用于将从FIR滤波器输出的滤波数据乘以各通道的增益的增益乘法块和用于将从增益乘法块输出的数据加到输出I的通道加法器块 通道和Q通道信号。