HF radio communication with automatic link establishment capability at Universiti Malaysia Pahang

Abstract

Transmitted HF radio wave is reflected back to earth by free electrons in the ionospheric layer. Thus these bands of frequencies which are from 3 to 30 MHz can be utilized for voice and data communication. Despite the unpredictability and propagation problems faced by HF radio communication, it still has many benefits such as the system is low-cost, requires minimum equipments and easy to set up. The purpose of this paper is to present the research work on establising a HF radio communication station in Universiti Malaysia Pahang (UMP). The HF communication is intended for voice and data communication. It is equipped with Automatic link Establishment (ALE) capability to enhance the system’s reliability and performance. Equipments used in this research are HF radio, PC and HF modem. Field testing is conducted between Universiti Teknologi Malaysia (UTM) Skudai and UMP to verify the performance of the system.