QOTSW-A New Type of Quadrature Overlapped Modulation with Excellent Performance

Shao Wen-chang; Zhao Jian

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QOTSW-A New Type of Quadrature Overlapped Modulation with Excellent Performance

更新时间：2025-12-08

- QOTSW-A New Type of Quadrature Overlapped Modulation with Excellent Performance
- Acta Electronica Sinica Issue 3, Pages: 57-64(1989)
- 作者机构：
  
  中国科学院电子学研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1989
- 稿件说明：
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[1]邵文昌,赵坚.QOTSW——一种性能优良的新型正交重叠调制方式[J].电子学报,1989(03):57-64.

Shao Wen-chang, Zhao Jian. QOTSW-A New Type of Quadrature Overlapped Modulation with Excellent Performance[J]. Acta Electronica Sinica, 1989, (3): 57-64.
[1]邵文昌,赵坚.QOTSW——一种性能优良的新型正交重叠调制方式[J].电子学报,1989(03):57-64. DOI：

Shao Wen-chang, Zhao Jian. QOTSW-A New Type of Quadrature Overlapped Modulation with Excellent Performance[J]. Acta Electronica Sinica, 1989, (3): 57-64. DOI：

摘要

本文研究了信码加权波形的优化

提出采用三角波叠加正弦波作为加权波的正交重叠调制方式

并称为QOTSW调制方式。研究了为获得具有窄的功率谱密度的已调信号的特性

其旁瓣滚降很快且带外的归一化功率也很小

实验的结果和理论的计算是一致的

有关这种调制方式的实用问题也作了讨论。

Abstract

By studing of the optimum of the symbol weighted wave shape

a new type of quadrature overlapped modulation that is called QOTSW （Quadrature Overlapped Triangular Sine Wave） modulation using a triangular wave added to a sine wave as a symbol weighted waveform is presented. The performance of the modulated signal has been investigated that shows the power spectral density is narrow and the sidelobe drop off very fast. The normalized power of out-of-band is also very small. The experimental result is in agreement with the theoretical calculation. The problem in relation of application for QOTSW modulation has also been discussed.

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