The IUP Journal of Telecommunications
Design and Simulation of Interference Mitigation Algorithm for an L-Band Digital Aeronautical Communications System†

Article Details
Pub. Date : November' 2021
Product Name : The IUP Journal of Telecommunications
Product Type : Article
Product Code : IJTC21121
Author Name : Pushpa Lakshmi Jayaramaiah* and K Saraswathi**
Availability : YES
Subject/Domain : Arts & Humanities
Download Format : PDF Format
No. of Pages : 12



The L-Band Digital Aeronautical Communications System (LDACS) 1 is an alternative to the current Very High Frequency (VHF) technology which meets the needs of upcoming demands. LDACS1, an Orthogonal Frequency Division Multiplexing (OFDM), operates in the L-Band between 960 and 1167 MHz frequencies installed in the middle of two Distance Measuring Equipment (DME) channels with 500 kHz spectral gap. In this paper-LDACS1 OFDM and LDACS1 2 x 2 Multiple Input Multiple Output (MIMO) are designed and simulated without any interference. The DME interference is introduced only to the LDACS1 OFDM, and significant degradation in the performance is observed. The pulse blanking technique helps in lowering the interference in the LDACS1 OFDM system, resulting in a performance close to the performance in the interference-free case. The Bit Error Rate (BER) performances for the conditions with and without interference and pulse blanking are compared. An improvement in the BER performance is seen with respect to design of LDACS1 2 x 2 MIMO system.


A modern communication infrastructure is crucial, and a feasible solution is necessary for the air transportation industry. Air Traffic Management (ATM) is vital for aircraft control and other operations during the different stages of flight. The present technologies for ATM communication, though reliable, encounter high saturation levels in the Very High Frequency (VHF) band in extreme flight density zones. An attempt to develop a modernized communication and expand the airspace capacity was initiated by the European Union. L-Band Digital Aeronautical Communications System (LDACS) technology as defined by the Union targets the usage of L-band to support the ATM in terms of performance in voice and data communication along


L-Band Digital Aeronautical Communications System (LDACS) 1, Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output (MIMO), Distance Measuring Equipment (DME) interference, Pulse blanking mitigation