Analysis of Low Probability of Detection Capability for Chaotic Standard Map-Based FH-OFDMA System

Junwoo Jung,Haengik Kang,Seungbok Kwon,Jaesung Lim,Sungyeol Park

doi:10.3390/app11052198

Abstract

A frequency hopping orthogonal frequency division multiple access (FH-OFDMA) can provide low probability of detection (LPD) and anti-jamming capabilities to users against adversary detectors. To obtain an extreme LPD capability that cannot be provided by the basic symbol-by-symbol (SBS)-based FH pattern, we proposed two FH patterns, namely chaotic standard map (CSM) and cat map for FH-OFDMA systems. In our previous work, through analysis of complexity to regenerate the transmitted symbol sequence, at the point of adversary detectors, we found that the CSM had a lower probability of intercept than the cat map and SBS. It is possible when a detector already knows symbol and frame structures, and the detector has been synchronized to the FH-OFDMA system. Unlike the previous work, here, we analyze whether the CSM provides greater LPD capability than the cat map and SBS by detection probability using spectrum sensing technique. We analyze the detection probability of the CSM and provide detection probabilities of the cat map and SBS compared to the CSM. Based on our analysis of the detection probability and numerical results, it is evident that the CSM provides greater LPD capability than both the cat map and SBS-based FH-OFDMA systems.

Highlights

Frequency hopping-orthogonal frequency division multiple access (FH-OFDMA) can provide low probability of detection (LPD) and anti-jamming capabilities to authenticated users against adversaries for secure multimedia and military communication services [1]
The simulation results are provided to analyze whether the chaotic standard map (CSM)-based FH-OFDMA system provides greater LPD capability than the cat map and SBS-based FH-OFDMA systems
The FH-OFDMA signal is sent over a wireless six-ray channel impulse model of the Universal Mobile Telecommunications System—Terrestrial Radio Access System (UTRA) vehicular model A [20]

Summary

Introduction

Frequency hopping-orthogonal frequency division multiple access (FH-OFDMA) can provide low probability of detection (LPD) and anti-jamming capabilities to authenticated users against adversaries for secure multimedia and military communication services [1]. In the OFDMA system, the entire frequency spectrum is divided into multiple narrow-band subcarriers, which are assigned to multiple users to transmit data symbols on different subcarriers simultaneously [2]. In the FH-OFDMA system, the total number of subcarriers is partitioned into a set of clusters composed of contiguous subcarriers, and each cluster is changed to a different frequency during each period based on the FH pattern. The users are each assigned to one of the clusters to transmit data symbols over the FH-OFDMA system. In this study, we have fundamentally different focus on the advantage of the FH-OFDMA system that supports LPD against detection of adversaries, such as eavesdroppers or radiometers

Objectives

Results

Conclusion