Two Waveform Sequences for Improving the Frequency Resolutions of Direct Digitally Synthesized Periodic Signals

TIAN Xin-guang; GAO Li-zhi; ZHANG Er-yang

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Two Waveform Sequences for Improving the Frequency Resolutions of Direct Digitally Synthesized Periodic Signals

更新时间：2025-07-16

- Two Waveform Sequences for Improving the Frequency Resolutions of Direct Digitally Synthesized Periodic Signals
- Acta Electronica Sinica Vol. 32, Issue 3, Pages: 388-390(2004)
- 作者机构：
  
  1. 国防科技大学电子科学与工程学院,湖南,长沙,410073
  2. 清华大学电子工程系,北京,100084
  3. 北京首信集团研究院,北京,100016
  4. 国防科技大学电子科学与工程学院湖南长沙,410073
  5. 清华大学电子工程系北京,100084
  6. 北京首信集团研究院北京,100016
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911
- Published：2004
- 稿件说明：
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TIAN Xin-guang, GAO Li-zhi, ZHANG Er-yang. Two Waveform Sequences for Improving the Frequency Resolutions of Direct Digitally Synthesized Periodic Signals[J]. Acta Electronica Sinica, 2004, 32(3): 388-390.
DOI：

TIAN Xin-guang, GAO Li-zhi, ZHANG Er-yang. Two Waveform Sequences for Improving the Frequency Resolutions of Direct Digitally Synthesized Periodic Signals[J]. Acta Electronica Sinica, 2004, 32(3): 388-390. DOI：

摘要

在利用直接数字合成方法产生周期性宽带通信对抗背景信号时

信号的频率分辨率、带宽及频谱复杂度直接受限于合成系统的工作频率和存储容量.本文提出两种波形序列

能够在不改变合成系统工作频率和存储容量并且不影响合成信号的幅频包络和基本时域特性的情况下将其频率分辨率提高四倍以上

并且可以提高合成信号的频谱复杂度和可变性.这两种序列还可用于其它高频率分辨率周期信号的直接数字合成.

Abstract

In the direct digital synthesis of periodic communication signals for communication countermeasure experiments

the frequency resolutions

bandwidths and spectral complexities of the synthesized signals are limited by the working frequency and data capacity of the synthesizing system.This paper presents two waveform sequences applied to improve the frequency resolutions and spectral complexities of the synthesized periodic signals without changing their spectral envelopes and basic time-domain properties under the condition of fixed working frequency and data capacity.The two sequences are applicable to the digital synthesis of some other periodic signals.

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