Masters Theses


"Passive, backscatter-based communication technology is increasingly employed in wireless sensing applications. It offers several advantages including small form factor, battery-less operation, increased system lifetime, small configurations, etc. The main focus of this work is to study the theoretical limits of the network performance in such passive sensor networks. In addition to the traditional direct communication between an active and several passive devices (like RFID), the information theoretic analysis considers two new communication frameworks: multi-hop and multipath passive networks. These new frameworks are demonstrated through theoretical and simulation results to improve the network performance and fairness over the traditional direct communication. This thesis is organized into two papers: first one provides generic capacity analysis for the three frameworks, while the second one proposes a TDMA-based protocol and studies the capacity in that specific realization.

The first paper derives the fading channel capacity limits of passive wireless backscatter communication networks operating under three different frameworks: single hop, multi-hop and multipath communication schemes. Furthermore, a comparative analysis of the three communication schemes is presented. A novel power profile model varying with distance is proposed for the Rician fading environment by deriving the Rician K parameter varying with distance. Numerical evaluation of the capacity limits using the proposed model verifies the theoretical conclusions.

The second paper proposes a TDMA-based realization, which has several advantages like reduced interference, virtual power control, etc., as compared to the conventional backscatter networks. The capacity limits of the backscatter network operating in the fading channel environment employing the TDMA scheme are presented for single hop and multi-hop communication frameworks. Further, the capacity limits are derived for the case with distributed beamforming for both frameworks. This is followed by a comparative analysis and numerical evaluation of capacity limits.

The results demonstrate a significant, quantified improvement in performance when the proposed multi-hop and multipath frameworks are employed. The Monte Carlo simulations for randomly generated topologies verify the theoretical analysis"--Abstract, page iv.


Zawodniok, Maciej Jan, 1975-

Committee Member(s)

Kosbar, Kurt Louis
Sarangapani, Jagannathan, 1965-


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


National Science Foundation (U.S.)


Missouri University of Science and Technology

Publication Date


Journal article titles appearing in thesis/dissertation

  • Fading channel capacity analysis of passive backscatter communication networks.
  • Capacity analysis of a proposed TDMA scheme for passive backscatter-based wireless sensor networks


x, 76 pages

Note about bibliography

Includes bibliographical references.


© 2012 Aditya V. Padaki, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Wireless sensor networks
Passive components
Communication -- Technological innovations

Thesis Number

T 10064

Print OCLC #


Electronic OCLC #