摘要
Abstract
According to modulation and demodulation theory, using MATLAB simulation, the baseband modulation and demodulation technology of 16QAM and 64QAM(quadrature amplitude modulation) are thoroughly analyzed. By comparing their differences, the theory characteristics, production process as well as the impact on the communication channel of Gaussian and Rayleigh channel are researched. In the meantime, the bit error of QAM after passing Gaussian and Rayleigh channel are discussed, the BER(bit error rate) performances of 16 QAM and 64 QAM under same channel condition are analyzed , as well as the relative technology on QAM modulation is summarized, which provides theoretic reference for higher order QAM modulation mode in the future application.关键词
TD-LTE/QAM/仿真/误码率Key words
TD-LTE/QAM/simulation/bit error rate分类
信息技术与安全科学
