| 摘要: |
| 分析了GMSK调制原理，设计了GMSK调制器的一种全数字实现电路。该电路采用查表
法实现高斯滤波功能，采用CORDIC算法完成正交调制信号输出，具有电路规模小、精度可调
、应用灵活等特点。该电路通过了FPGA验证并成功应用于TETRA集群通信系统。 |
| 关键词: TETRA集群通信 软件无线电 数字调制 数字信号处理 高斯
滤波最小频移键控 电路设计 |
| DOI： |
|
| 基金项目: |
|
| Design and FPGA Implementation of a GMSK Modulator Circuit |
| LI Han-qiao,CHEN Hai-teng,YAO Ya-feng |
| (Department of Software & Engineering, Wuhan Vocational College of Software and Engineering,Wuhan 430076,China;School of Mechanical & Electronic Informatio
n, China University of Geosciences,Wuhan 430074,Chin) |
| Abstract: |
| The theory of GMSK(Gaussian Filtered Minimum Shift Keying) modulation is analyse
d a
nd the circuit of modulator is implemented. The Gauss filter is implemented base
d on loo
kup table and the orthogonal modulation signal is generated by CORDIC(Coordinate
Rotation Digital Computer)algorithm in
GMSK modulator circuit, so the circuit is simple, adjustable and flexible.It is
verified by FPGA and is successfully applied in TETRA communication systems
. |
| Key words: TETRA trunking communication software defined radio(SD
R) digital modulation DSP GMSK circuit design |
