为了解决应用在高速通信场合中的AD采样率受限的问题，介绍了一种基于欠采样的调制解调技术，提出了非均匀分数间隔均衡算法和基于可编程逻辑器件（FPGA）的调制解调器设计方法，并给出了主要测试结果，包括2MHz、8MHz和34MHz这3种速率在不同信噪比下的误码率曲线。该技术相比传统的过采样方法性能有明显的改善，具有硬件实现简单、节约芯片资源、实用性强、性能良好以及同步稳定可靠等特点。%In order to solve the difficult problem that the AD sampling frequency is restricted in high-speed communication, this pa- per introduces a modulation and demodulation technology based on undersampling. The paper presents the algorithm of non-uniform fractional spaced equalizer and the design method based on FPGA,and finally gives the main test result,including three kinds of BER curves for different SNRs at the speed of 2 MHz,8 MHz and 34 MHz. Compared with traditional oversampling method,this technology is easy to implement and saves the chip resource, and has the characteristics of good practicability, good performance, stable and reliable synchronization etc.
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