新型无线感应系统的二进制幅度调制解调分析  

Analysis of 2ASK mod-demodulation in new radio induction system

作　　者：谭启泉[1] 连级三[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《铁道学报》2003年第4期67-70,共4页Journal of the China Railway Society

基　　金：科技部项目子项目(852202)

摘　　要：列车等车体与地面的通信可以通过毫米波或泄漏同轴电缆或铁轨实现,作者提出来的新型无线感应技术也能实现车体与地面的通信。本文首先介绍了新型无线感应技术,然后研究了它的数字载波通信二进制幅度2ASK调制及相干解调;其次,仿照恒包络调制解调的方法,对于新型无线感应系统研究出了一种新型解调方法———绝对值积分非相干解调并进行了仿真,给出了误比特率表达式且与恒包络2ASK相干解调的误比特率进行了比较。研究表明,新型无线感应系统用在2ASK的调制解调中是完全可行的。Communication between trains and floor devices can be realized by means of millimeter wave, leakage coaxial cable and truck. The new radio induction technology proposed by the author can also complete communication between trains and floor devices. First, the new radio induction technology is introduced, and its 2ASK modulation and coherent demodulation in digital carrier communicaltion are studied . Second, following the constant envelope moddemodulation method, a new demodulation method--the absolutevalue integrae noncoherent demodulation --is found for the 2ASK of the new radio induction system and is simulated. The expression for the biterror rateo is given and compared with the biterror rate of the constant envelope 2ASK coherentdemodulation. The research result shows that the new radio induction system is completely practical in the 2ASK communication.

关 键 词：无线感应 变参信道 2ASK 误比特率 

分 类 号：TN929.5[电子电信—通信与信息系统]