Preliminary study on HF channel complex impulse response and power delay profile characteristics in low latitude region

Abstract

The performance of wideband HF long distance communication systems is heavily influenced by the ionosphere conditions because of the function of the ionospheric layer as a reflector for HF radio waves. There are several diurnal variations of the ionosphere during the day and night and disturbances in ionopheric layer especially in the low latitude region called Equatorial Spread F (ESF). This paper describes a measurement result to find delay spread and rms delay spread of wideband HF radio communication system in Surabaya -Merauke link for daytime and nighttime channels. Pseudorandom Binary Sequence (PRBS) signals are transmitted from Surabaya (07 o 15' S 112 o 45' E) and received in Merauke (08 o 30' S 140 o 27' E). The result of this paper should be compared to the ionosphere conditions provided by ionosonde operated in Kupang (09 o 19' S 10 o 57' E), approximately in the middle of the HF link.

Analisa Karakteristik Kanal HF Lintasan Jamak

“…Penelitian tersebut dilakukan untuk memperoleh parameter power delay profile dan delay spread pada sistem komunikasi HF lintasan Surabaya -Merauke. Kemudian hasil data yang diperoleh dibandingkan dengan hasil statistik parameter jalur lintasan Kupang [4]. Sebagai referensi, jurnal tersebut berisikan karakteristik kanal HF yang dapat dikembangkan kembali dengan data statistik uji sistem yang berbeda dan metode yang berbeda yaitu jarak lintasan Jakarta -Merauke dengan metode simulasi menggunakan perangkat lunak PropLab V3.…”

Statistical Modeling of Low-Latitude Long-Distance Hf Ionospheric Multi-Mode Channels

“…A measurement campaign is performed to measure the HF radio channel low pass-equivalent impulse responses. The measurement system block diagram and parameters have been reported in a previous paper [16], with the only change being the carrier frequency used herein, which is 14 MHz, instead of 7 MHz [17].…”