CAJ | 학술논문

该文介绍了AIS系统中的NRZI编码及GMSK的调制解调原理和特点,在详细分析了NRZI编码过程和GMSK调制解调算法的基础上,在Matlab平台上对AIS信号进行NRZI编码,并根据正交调制和1bit差分检测算法进行了GMSK的仿真实现。程序运行结果表明,程序设计方案能正确实现NRZI编码和GMSK的调制,较好地完成了预期目标。
해문개소료AIS계통중적NRZI편마급GMSK적조제해조원리화특점,재상세분석료NRZI편마과정화GMSK조제해조산법적기출상,재Matlab평태상대AIS신호진행NRZI편마,병근거정교조제화1bit차분검측산법진행료GMSK적방진실현。정서운행결과표명,정서설계방안능정학실현NRZI편마화GMSK적조제,교호지완성료예기목표。
This paper introduces the NRZI coding and the principle and advantages of GMSK modulation and demodulation in AIS system.On the basis of analyzing in detail the producing process of NRZI coding and the algorithm of GMSK modulation and demodulation,the paper makes NRZI coding and GMSK quadrature modulation and 1bit difference demodulation on Matlab.Program results show that the procedure can achieve NRZI coding and GMSK modulation and demodulation correctly and completion of a good target.