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主要对DCME中的传真解调、再调制技术进行了研究 ,针对基于ITU TV .2 9建议的 96 0 0b/s传真信号提出了一个全数字调制解调器模型 ,并给出了算法。在调制部分采用了符号成形法 ,较好地解决了频谱混叠的问题。该算法计算量小 ,具有较好的性能 ,易于DSP实现。
In this paper, we mainly study the fax demodulation and re-modulation technology in DCME, propose an all-digital modem model and propose the algorithm for the 9600b / s fax signal based on the ITU TV recommendation. In the modulation part of the use of symbol forming method, a better solution to the problem of spectral aliasing. The algorithm has a small amount of computation, has better performance and is easy to implement by DSP.