公开(公告)号：US20020075092A1

公开(公告)日：2002-06-20

申请号：US09738124

申请日：2000-12-15

Applicant: Motorola, Inc.

Inventor： Randy L. Turcotte ,  Stephen Chihhung Ma ,  Matthew A. Ronning ,  Keith V. Warble ,  Peter O. Okrah

IPC: H04L027/12 ,  H04L027/20

CPC classification number: H04L27/365

Abstract: A method and apparatus for generating digitally modulated signals in which a serial data stream of digital signals to be modulated (70) is provided, the serial data stream being converted into real and imaginary components (74) which are then converted into a complex polar signal (80) representing the serial data stream. A carrier of appropriate frequency is generated by an infinite impulse response filter (84,86) and the polar signal is mixed with the output of the infinite impulse response filter to provide a representation of the complex polar signal modulated at the frequency generated by the infinite impulse response filter (88). Subsequently the imaginary component of the resulting representation is stripped from the signal (90) and the real component of the resulting representation is applied to a digital to analog converter (92) to produce an analog version of the serial data stream.

Abstract translation: 一种用于产生数字调制信号的方法和装置，其中提供要调制的数字信号的串行数据流（70），所述串行数据流被转换成实部和虚部（74），然后将其转换成复极点信号 （80）表示串行数据流。 适当频率的载波由无限脉冲响应滤波器（84,86）产生，并且极坐标信号与无限脉冲响应滤波器的输出混合，以提供由无穷大产生的频率调制的复极点信号的表示 脉冲响应滤波器（88）。 随后，从信号（90）中剥离得到的表示的虚部，并将得到的表示的实分量施加到数模转换器（92）以产生串行数据流的模拟版本。