【摘 要】为了减少集成电路硬件复杂度，针对QAM 调制软件实现速度慢的问题，在分析MQAM 调制原理的基础上，采用

直接频率合成实现正余弦信号及无时延改进的滤波器编程方法，提出一种快速实现MQAM 调制算法的软件编程思想，并以

TMS320C55X 为平台[1，4]，将MQAM 调制算法进行了C 编程实现。结果表明：该编程方法能快速产生MQAM 调制信号。

【关键词】多电平正交幅度调制；脉冲成形滤波器；直接频率合成；数字信号处理-【Abstract】 In order to reduce the hardware complexity of integrated circuits for QAM modulation problems of slow software in the analysis based on the principle of MQAM modulation, using

Direct Synthesis of positive cosine signal and non-delay filter to improve programming method is proposed to achieve a fast MQAM modulation algorithm for software programming ideas and to

TMS320C55X as a platform [1,4], will be carried out MQAM modulation algorithm for C programming. The results show: The programming method can rapidly produce MQAM modulation signal.

Key words multi-level quadrature amplitude modulation　pulse shaping filter　direct frequency synthesizer　digital signal processing