Masters Theses


"This thesis includes experimental investigation of Multiple Input Multiple Output (MIMO) Radio Frequency (RF) fading channels and detection of superregenerative receivers. Details of experiment design and hardware implementation, data acquisition and analysis, and results for both studies are chronicled into two papers. The first paper investigates the validity of the discrete time triply selective fading channel model for fixed mobile-to-mobile MIMO channels. A 2x2 MIMO-OFDM testbed using the Altera Stratix III EP3SL150F field programmable gate array (FPGA) DSP development kit is used for acquiring experimental data. Subsequent offline signal processing and analysis are done in MATLAB. The Channel Impulse Response (CIR) is estimated using the Time domain Least Squares (LS) method. The channel coefficient covariance matrix is decomposed into its Kronecker factors - the spatial correlation matrix, inter-tap correlation matrix, and temporal correlation matrix. This study verifies the theoretical hypothesis and simulation results. The second paper proposes a novel method for detection of the superregnerative RF receivers. The algorithm is based on active stimulation and correlation of long pseudonoise (PN) sequences. An experimental setup is established using the Universal Software Radio Peripheral (USRP) as the primary component. Simulation results show that the maximum length PN sequences exhibit the best correlation properties among different potential stimulation signals. Proposed method improves range and accuracy of detection as compared to the passive detection and power detection methods"--Abstract, page iv.


Zheng, Y. Rosa

Committee Member(s)

Zawodniok, Maciej Jan, 1975-
Grant, Steven L.
Ghasr, Mohammad Tayeb Ahmad, 1980-


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


Missouri University of Science and Technology

Publication Date

Spring 2012

Journal article titles appearing in thesis/dissertation

  • Validation of triply selective fading channel model through MIMO testbed and experimental results
  • Improving detection range via correlation of long PN codes


ix, 39 pages


© 2012 Saurav Kumar Subedi, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

MIMO systems
Radio -- Receivers and reception -- Detection
Radio -- Transmitters and transmission -- Fading
Radio frequency -- Evaluation

Thesis Number

T 9989

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