针对数字正交变换器传统设计方法开发周期长、不易实现的问题，给出了利用DSP Builder工具箱设计开发的方法。同时，为了校正正交变换器信号分路引起的I、Q分量时延差，对内插时延滤波器进行了设计。最后分别在Matlab/Simulink和Modelsim中对设计的系统进行了算法级仿真及功能仿真。仿真结果与理论分析一致，表明了该设计方法的正确性。与传统的用硬件描述语言实现的方法相比较，该方法简单易行，容易修改和移植，具有工程实用价值。%In view of the problems that the development cycle of traditional design method of digital orthogonal converter is longer and not easy to implement, this paper presents a method for design and development using the DSP Builder toolbox. Meanwhile, it designs an interpolation delay filter for correcting the I and Q components delay difference caused by the signal division of the orthogonal circuits. And finally, it performs the simulations of algorithm level and function on the designed system respectively over Matlab/Simulink and Modelsim. Simulation results agree with the theoretical analysis, showing the correctness of the design method. Compared with the traditional implementation method using the HDL, this proposed method is simple to implement, easy to modify and transplant, and of practical value in engineering.
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