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NAVAL POSTGRADUATE SCHOOL - apps.dtic.mil · PDF fileBinary Phase-Shift Keyed (BPSK) and...

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NAVAL

POSTGRADUATE SCHOOL

MONTEREY, CALIFORNIA

THESIS

Approved for public release; distribution is unlimited

PORTABLE SIGNALS ANALYSIS SOLUTIONS USING SIGNALWORKS: A PROCESS GUIDE FOR ANALYSTS

AND STUDENTS

by

Eric W. Sears

September 2009

Thesis Co-Advisor: Tri Ha Thesis Co-Advisor: Vicente Garcia

Second Reader: Raymond Elliott

i

REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188) Washington DC 20503. 1. AGENCY USE ONLY (Leave blank)

2. REPORT DATE September 2009

3. REPORT TYPE AND DATES COVERED Masters Thesis

4. TITLE AND SUBTITLE Portable Signals Analysis Solutions using Signalworks: A Process Guide for Analysts and Students 6. AUTHOR(S) LT Eric Sears

5. FUNDING NUMBERS

7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Naval Postgraduate School Monterey, CA 93943-5000

8. PERFORMING ORGANIZATION REPORT NUMBER

9. SPONSORING /MONITORING AGENCY NAME(S) AND ADDRESS(ES) N/A

10. SPONSORING/MONITORING AGENCY REPORT NUMBER

11. SUPPLEMENTARY NOTES The views expressed in this thesis are those of the author and do not reflect the official policy or position of the Department of Defense or the U.S. Government. 12a. DISTRIBUTION / AVAILABILITY STATEMENT Approved for public release; distribution is unlimited.

12b. DISTRIBUTION CODE

13. ABSTRACT (maximum 200 words) Signalworks is a signals analysis software suite designed to be installed on Windows and Linux

portable computing platforms. The demodulation applications within the program offer considerable processing capability for a variety of signals coupled with a graphical interface that is both easy to use and configure. This thesis examines the process of building test signals within Signalworks and then processing them with the available demodulation applications to define important parameters used to identify and analyze signals. Although Signalworks version 4.0 is unable to demodulate Orthogonal Frequency Division Multiplexed (OFDM) signals often used in wireless communications, it can process Binary Phase-Shift Keyed (BPSK) and Quadrature Phase-Shift Keyed (QPSK) signals used in the 802.11b standard. While future versions may include OFDM demodulation capability, this analysis includes the feasibility of using Signalworks in a lab environment to demonstrate and educate students on signal characteristics including wireless communication signals.

15. NUMBER OF PAGES

125

14. SUBJECT TERMS Signals analysis, portable signal processing, Signalworks

16. PRICE CODE

17. SECURITY CLASSIFICATION OF REPORT

Unclassified

18. SECURITY CLASSIFICATION OF THIS PAGE

Unclassified

19. SECURITY CLASSIFICATION OF ABSTRACT

Unclassified

20. LIMITATION OF ABSTRACT

UU NSN 7540-01-280-5500 Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std. Z39.18

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Approved for public release; distribution is unlimited.

PORTABLE SIGNALS ANALYSIS SOLUTIONS USING SIGNALWORKS: A PROCESS GUIDE FOR ANALYSTS AND STUDENTS

Eric W. Sears

Lieutenant, United States Navy B.S., Hawaii Pacific University, 1998

Submitted in partial fulfillment of the requirements for the degree of

MASTER OF SCIENCE IN INFORMATION WARFARE SYSTEMS ENGINEERING

from the

NAVAL POSTGRADUATE SCHOOL September 2009

Author: Eric W. Sears

Approved by: Tri Ha Thesis Co-Advisor Vicente Garcia Thesis Co-Advisor

Raymond Elliott Second Reader

Dan Boger Chairman, Department of Information Sciences

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ABSTRACT

Signalworks is a signals analysis software suite designed to be installed

on Windows and Linux portable computing platforms. The demodulation

applications within the program offer considerable processing capability for a

variety of signals coupled with a graphical interface that is both easy to use and

configure. This thesis examines the process of building test signals within

Signalworks, and then processing them with the available demodulation

applications to define important parameters used to identify and analyze signals.

Although Signalworks version 4.0 is unable to demodulate Orthogonal

Frequency Division Multiplexed (OFDM) signals often used in wireless

communications, it can process Binary Phase-Shift Keyed (BPSK) and

Quadrature Phase-Shift Keyed (QPSK) signals used in the 802.11b standard.

While future versions may include OFDM demodulation capability, this analysis

includes the feasibility of using Signalworks in a lab environment to

demonstrate and educate students on signal characteristics including wireless

communication signals.

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vii

TABLE OF CONTENTS

I. INTRODUCTION............................................................................................. 1 A. OVERVIEW OF SIGNALWORKS SOFTWARE SUITE .................... 1 B. OBJECTIVE ......................................................................................... 2 C. THESIS ORGANIZATION.................................................................... 2

II. PHASE-SHIFT KEYED SIGNAL ANALYSIS ................................................. 5 A. OVERVIEW OF PHASE-SHIFT KEYED SIGNALS ............................. 5

1. Signal Characteristics ............................................................. 5 2. Applications ............................................................................. 6

B. GENERATING TEST SIGNAL WITH SIGNALGEN............................. 7 1. Procedural Guidance............................................................... 7 2. Creating a BPSK Signal using the Signalworks

SignalGen Application ............................................................ 7 C. INITIAL ANALYSIS WITH PREVIEW ................................................ 15

1. Procedural Guidance............................................................. 15 2. Initial Analysis using the Signalworks Preview

Application ............................................................................. 16 D. ADDITIONAL ANALYSIS WITH DEMOD.......................................... 23

1. Procedural Guidance............................................................. 23 2. Advanced Analysis with Demod........................................... 23

E. BPSK ANALYSIS RESULTS............................................................. 24 III. QUADRATURE PHASE-SHIFT KEYED SIGNAL ANALYSIS ..................... 27

A. OVERVIEW OF QUADRATURE PHASE-SHIFT KEYED SIGNALS. 27 1. Signal Characteristics ........................................................... 27 2. Applications ........................................................................... 28

B. GENERATING QPSK TEST SIGNAL WITH SIGNALGEN ............... 28 1. Procedural Guidance............................................................. 28 2. Creating a QPSK Signal using the Signalworks

SignalGen Application .......................................................... 28 C. INITIAL ANALYSIS WITH PREVIEW ................................................ 32

1. Procedural Guidance............................................................. 32 2. Initial Analysis using the Signalworks Preview

Application ............................................................................. 33 D. ADDITIONAL ANALYSIS WITH DEMOD.......................................... 40

1. Procedural Guidance............................................................. 40 2. Advanced Analysis with Signalworks Demod

Application ............................................................................. 40 E. QPSK ANALYSIS RESULTS ............................................................ 43

IV. QUADRATURE AMPLITUDE MODULATION SIGNAL ANALYSIS ............ 45 A. OVERVIEW OF QUADRATURE AMPLITUDE MODULATION

SIGNALS ........................................................................................... 45 1. Signal Characteristics ........................................................... 45

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2. Applications ........................................................................... 46 B. GENERATING QAM TEST SIGNAL WITH SIGNALGEN ................. 46

1. Procedural Guidance............................................................. 46 2. Creating a QAM Signal using the Signalworks

SignalGen Application .......................................................... 47 C. INITIAL QAM ANALYSIS WITH PREVIEW....................................... 51

1. Procedural Guidance............................................................. 51 2. Initial QAM Analysis usin

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