L频段宽带航空数据链系统1（L-DACS1）是民航新一代空中交通管理系统的重要通信基础设施。针对L 频段数字航空通信系统1以内嵌方式部署在航空无线电导航频段而产生的测距仪( DME)脉冲干扰正交频分复用( OFDM) 接收机的关键技术问题，开展L频段宽带航空数据链系统OFDM接收机联合干扰消除与信号解调方法的研究。基于马尔科夫蒙特卡罗（MCMC）、置信度传播 (BP)及期望最大化 (EM)理论提出L频段宽带航空数据链OFDM接收机联合接收方法。构建宽带航空数据链仿真与实验测试系统，通过仿真与实验验证所提出方法的正确性。本基金将突破L-DACS1系统关键技术，项目为L-DACS1系统以内嵌方式部署在航空无线电导航频段奠定理论与技术基础。

L-band Digital Aeronautical Communications System1 (L-DACS1) is an important communications infrastructure for the next generation Air Traffic Management system (ATM). In order to cope with the problem that the Orthogonal Frequency Division Multiplexing (OFDM) receiver of L-DACS1 system suffers the interference of the Distance Measuring Equipment (DME) signals in the aeronautical radio navigation L-band, the joint DME interference suppression and OFDM demodulation for OFDM receiver is investigated. The joint method of DME interference suppression and OFDM demodulation is studied based on the theory of Markov Chain Monte Carlo(MCMC), Belief Passing(BP) and Expectation Maximization(EM). The proposed methods are verified based on the simulation system and the test and verification system of L-DACS1. The research will break through the key technology of L-DACS1 system and lay the foundation for L-DACS1 system deployed in the aeronautical radio navigation L-band.