| 摘要: |
| 为了提高调制器的灵活性和可扩展性，设计了一个中心频率和符号速率可调，且支持多种调制体制的高速通用数字调制器方案，并能产生中频为80 MHz，带宽为7.936 5 MHz的正交相移键控(QPSK)信号和16QAM(正交幅度调制)信号。集中论述基于软件无线电的通用调制算法、符号映射原理和高速成形滤波模块的具体实现。测试结果表明，该方案开放性好，结构简单，体积小，具有一定的实用性和通用性。 |
| 关键词: 通用调制器 正交幅度调制 AD9957器件 软件无线电 成形滤波器 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Design and implementation of high speed and general-purpose digital modulator |
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WANG Peng, YANG Chun, WEN Zhao-Jin
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Institute of Electronic Engineering，China Academy of Engineering Physics，Mianyang Sichuan 621900，China
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| Abstract: |
| This article introduces a new type of high speed，multi-modulated digital modulator with adjustable center frequency and bit rate features. It can realize the Quadrature Phase Shift Keying(QPSK) and 16QAM(Quadrature Amplitude Modulation) with 80 MHz center frequency and 7.936 5 MHz bandwidth. The general-purpose modulation arithmetic based on software radio，symbol mapping and the realization of pulse shaping filter are discussed. The measuring results demonstrate that the modulation scheme meets the requirements of practicability and general utilization. |
| Key words: general-purpose modulator Quadrature Amplitude Modulation AD9957 software defined radio pulse shaping filter |
