摘要
水上宽带甚高频无线通信系统作为GMDSS现代化的发展重点,通过分析《ITU-R M.2092-0建议书》的地面部分通信技术特性和《ITU-R M.1842-1建议书》附件4的系统性能,得出如下结论:在达到307.2 kb/s传输速率的条件下,发射机信噪比应至少达到7.41;选择合适的发射机、接收机天线高度能够实现宽带VHF信号25海里的覆盖范围;接收机误码率、信道容量都随着多阶QAM的阶数增加而增加,则阶数为16时,即16QAM可作为满足低误码率、高信道容量的优化选择。
The broadband VHF（B-VHF） wireless communication system on water is the key point of GMDSS modernization. By analysis of the recommendations of ITU-R M.2092-0 and ITU-R M.1842-1, the results show that （1）the SNR of transmitter should be 7.41 at least under the condition of reaching the the transmission rate of 307.2 kbps ; （2）the B-VHF signal can be covered with a range of 25 nm on selecting the appropriate antenna heights of transmitter and receiver;（3）the BER of receiver and channel capacity are increased with the increase of M in MQAM, so M=16 is the optimal selection to meet the low BER and high channel capacity.
出处
《电子技术应用》
北大核心
2016年第11期92-94,98,共4页
Application of Electronic Technique
基金
交通运输部应用基础研究项目(2015329810030)
国家自然科学基金项目(51579143)
