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随着软件无线电技术的发展,数字接收机中广泛采用了该项技术。该文介绍了基本软件无线电的数字接收技术,包括了带通采样和数字下变频技术,并推导了一种基于多相滤波结构的宽带数字接收模型。该结构模型在传统低通结构的基础上推导而来,具有计算量下、易于实现的特点。通过对宽带数字接收系统的仿真,验证了该宽带数字接收系统结构模型的正确性。
With the development of software radio technology, this technology is widely adopted in digital receivers. This paper introduces the basic software radio digital reception technology, including band-pass sampling and digital down-conversion technology, and derives a wideband digital reception model based on the polyphase filter structure. The structure model is derived on the basis of the traditional low-pass structure, which has the characteristics of being easy to realize under the computational load. Through the simulation of the broadband digital receiving system, the correctness of the structure model of the digital receiving system is verified.