介绍了软件无线电技术的概念及其调制平台的数学模型,并提出了在现阶段DSP技术的发展水平下软件无线电调制平台的一种硬件实现方案,该方案首先利用DSP芯片在基带完成调制功能,生成各种调制方式所需要的数字信号,然后对调制之后得到的数字信号进行数模转换,再利用正交模拟混频方式得到上变频之后的信号.本文还介绍了一些数字调制方式的算法,并给出了这些调制方式的算法在该硬件平台上的实现方案.实验结果表明,本文所提供的方案确实可行.
In this paper,the concept and modulation model of software radio are discussed, and a realization method of the software radio hardware digital modulation platform based on the current DSP technology is also proposed. In this method, modulation is realized at based band. After D/A conversion and orthogonal analog up-conversion, the software radio signal can be got. The methods of realizing some digital modulation algorithms on the platform are also proposed in this paper. The experimental results show that the proposed platform is effectively practical.