| 基于TMS320C6x实现多载波QPSK信号全数字化整体解调 |
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| 引用本文： | 黄文准,王文艺,周德锁. 基于TMS320C6x实现多载波QPSK信号全数字化整体解调[J]. 电子工程师, 2005, 31(8): 24-26,31 |
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| 作者姓名： | 黄文准 王文艺 周德锁 |
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| 作者单位： | 1. 西北工业大学,陕西省,西安市,710072
2. 空军工程大学电讯工程学院,陕西省,西安市,710077 |
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| 摘 要： | 提出并证明了一种群路FDMA/QPSK(频分多址/正交相移键控)信号全数字化整体解调的新方法,该方法根据信道构成特点和信号调制方式,将直接分路法和常规多相FFT(快速傅里叶变换)分离法相结合,构成了一种简化的等效多相FFT分路方法,再将输出的数字信号送到数字式解调器,实现了多载波信号的全数字化整体解调,其特点是软件和硬件结构简单、系统计算量小,且易于DSP实时实现,现已用该算法进行了32路FDMA/QPSK信号整体解调的计算机仿真实验,结果表明该方法是可行的.
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| 关 键 词： | 多载波解调 数字分路 数字解调 数字信号处理 |
| 收稿时间： | 2005-04-01 |
| 修稿时间： | 2005-04-01 |
The Implementation of Fully Digitized Demodulation for Multicarrier QPSK Signals as a whole with TMS320C6X |
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| Huang Wenzhun,Wang Wenyi,Zhou Desuo. The Implementation of Fully Digitized Demodulation for Multicarrier QPSK Signals as a whole with TMS320C6X[J]. Electronic Engineer, 2005, 31(8): 24-26,31 |
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| Authors: | Huang Wenzhun Wang Wenyi Zhou Desuo |
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| Abstract: | A new method of fully digitized demodulation for 2M-FDMA/QPSKgroup signals as a whole is presented and proved in this paper. According to the features of channel forming and the signal modulation mode, a simplified equivalent ployphase-FFT demultiplexing method is given by combining the direct demutiplexing with conventional ployphase-FFT demultiplexer. The output digital signals of the demultiplexer are sent to the digitized demodulator so that the fully digitized integral multi-cartier demodulator is realized. This system is characterized by the simple software and hardware structure, little computation and easy real-time realization with DSP. The computer simulation experiment of integral demodulation with the algorithm given in the paper for 32-channel FDMA/QPSK signal has been finished. The results show that the method is feasible. |
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| Keywords: | multi-carrier demodulating (MCD) digitized demultiplexing digitized demodulation DSP |
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