计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

固定采样率任意符号速率基带信号产生算法

王大海,彭华,李天昀   

  1. (解放军信息工程大学信息系统工程学院,郑州 450001)
  • 收稿日期:2014-12-24 出版日期:2016-02-15 发布日期:2016-01-29
  • 作者简介:王大海(1989-),男,硕士研究生,主研方向为通信信号处理、软件无线电;彭华,教授、博士生导师;李天昀,副教授。

Baseband Signal Generation Algorithm of Arbitrary Symbol Rate in Condition of Fixed Sampling Rate

WANG Dahai,PENG Hua,LI Tianyun   

  1. (School of Information System Engineering,PLA Information Engineering University,Zhengzhou 450001,China)
  • Received:2014-12-24 Online:2016-02-15 Published:2016-01-29

摘要: 软件无线电发射机中一些应用(如通信电子战干扰发射机)需要在采样率不变的情况下生成一定范围内任意符号速率基带信号。针对该类需求,提出一种基于取邻思想的固定采样率任意符号速率基带信号产生算法。对大整数倍符号速率基带信号进行任意倍数的取邻抽取,将取邻近似导致的误差等效为基带信号信噪比的损失。理论推导和仿真结果表明,该算法只需很少的存储资源,即可减小取邻误差对基带信号质量的影响,满足实际系统需要。

关键词: 软件无线电发射机, 通信电子战干扰发射机, 基带信号, 升余弦滤波器, 现场可编程门阵列, 数模转换器

Abstract: In software radio transmitter,some applications(such as communication electronic warfare jamming transmitter) need to generate arbitrary symbol rate baseband signal in a certain range in the condition of fixed sampling rate.For this application,an arbitrary symbol rate baseband signal generation algorithm in the condition of fixed sampling rate is presented in this paper.The thought of the algorithm is arbitrary neighbor decimation from large integer multiple symbol rate baseband signal.It takes the neighbor error equivalent as the loss of baseband Signal Noise Ratio(SNR).Theoretical derivation and simulation results show that the neighbor error makes little impact on the baseband signal quality by using a few storage resources.It is enough to satisfy the requirements of the practical system.

Key words: software radio transmitter, communication electronic warfare jamming transmitter, baseband signal, raised cosine filter, Field Programmable Gate Array(FPGA), Digital Analog Converter(DAC)

中图分类号: