Date of Award

12-2005

Document Type

Thesis

Degree Name

Master of Science in Electrical Engineering

Department

Department of Electrical and Computer Engineering

First Advisor

Michael A. Temple, PhD

Abstract

Results for modeling, simulation, and analysis of interference effects that modern interfering signals have on the system performance of the Binary Offset Carrier (BOC) signals, such as the Global Positioning System (GPS) Military System (M-Code signal) are addressed in this work. Three signals are addressed as potential interferers. These include the current GPS clear/acquisition code (C/A-Code) signal, the current GPS precision code (P-Code) signal, and an Orthogonal Frequency Division Multiplexed (OFDM) signal. All of these potential interferers are modeled as coexisting within the same bandwidth as the M-Code signal. Interference effects are characterized by comparing the bit error performance of a simulated M-Code system independently and then with the coexisting signal present. The results indicate that the GPS C/A-Code and P-Code signals can exceed the M-Code received power by over 25 dB before the M-Code system performance is degraded. The OFDM interference results indicate that the M-Code system is more sensitive to coexistence with a signal of this type; the M-Code system is significantly degraded with OFDM signals just over 30 dB stronger than the M-Code signal.

AFIT Designator

AFIT-GE-ENG-06-02

DTIC Accession Number

ADA443336

Download

Share

COinS