基于DDS的任意符号速率信号调制算法及实现

DDS-based Arbitrary Symbol Rate Signal Modulation Algorithm and Its Implementation

针对数字信号发生器产生任意符号速率调制信号,本文提出一种基于DDS原理以固定采样率实现符号速率任意连续可变的信号调制算法。该算法在正交调制模型基础上实现多种调制信号,并基于FPGA硬件平台实现了1 Ksps～100Msps连续可变符号速率的多种调制信号。介绍了信号调制算法的系统模型和理论推导,给出了该算法的仿真及FPGA硬件实测结果。实测结果表明该算法复杂度低、精度高、硬件资源消耗少,具有较高的实用性。

In view of digital signal generator produces arbitrary symbol rate modulated signals,this paper proposes a signal modulation algoritlim witli a fixed sampling rate based on the principle of DDS to achieve a continuously variable symbol rate.This algorithm implements multiple modulation signals based on quadrature modulation models.And the algorithm achieves 1 Ksps^100 Msps continuous variable symbol rate of a variety of modulated signal generation based on the FPG A harciware platform.The system model and theoretical derivation of the signal modulation algorithm are introduced.The algorithm simulation and FPG A hardware test results are given.The measured results show that the algorithmhas low complexity,high precision,low hardware resource con-sumption and high practicality.