Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2009, Vol. 32 ›› Issue (6): 47-52.doi: 10.13190/jbupt.200906.47.139

• Papers • Previous Articles     Next Articles

Research on Numerical Simulation of the Multipath Effects on Microwave Landing System

DAI Chuan-jin;WU De-wei;ZHAO Xiu-bin;WANG Wei;CHEN Xiao-ping   

  1. (1.Telecommunication Engineering Institute, Air Force Engineering University, Xi'an 710077, China;
    2.MilitaryDelegacy Office of Shanghai Aeronautical and Electronically Compan
  • Received:2009-04-07 Revised:2009-10-14 Online:2009-12-28 Published:2009-12-28
  • Contact: DAI Chuan-jin

Abstract:

In order to analyze and compute the multi-path efects on angle error of microwave landing system (MLS), a new numerical method based on the geometric optical and ray-tracing theory is proposed. In the new method, through the geometric optical and geometric diffraction theory, the signal level ratio of multi-path signal relative to direct signal can be effectively acquired. And through ray-tracing theory, the phase displacement can be computed to achieve the angle error pattern. Through the simulation, the angle error pattern is devided into in-beam region and out-of-beam regions. It is found that the in-beam error is key point of angle error. The new method is applied to simulate the multi-path scenario in an airport. And the results are compared with results of the experience methods to validate its feasibility.

Key words: control and navigation technology of aerocraft, microwave landing system, multi-path effect, angle error, numerical simulation