Masters Theses

Date of Award

8-2007

Degree Type

Thesis

Degree Name

Master of Science

Major

Electrical Engineering

Major Professor

Bruce Bomar

Committee Members

Peter Solies, Montgomery Smith

Abstract

This thesis investigates the potential value of multiple co-located receiver units for telemetry applications. In this thesis, a test board based on the NRF24L01 RF chip produced by Nordic Semiconductor was tested. Testing consisted of sending pseudo-random test data over a link between two test boards at progressive distances. Packet loss rate was identified as the dominant failure mode of the chip, and was used to determine performance increase. A parametric model of the chip performance was developed based on coherent and noncoherent FSK detectors and curve fit to the experimental data to model the performance of a single GFSK receiver with unknown parameters. The chip exhibited an estimated 10 fold improvement in bit error performance at short range, with the performance improvement dropping off as distance increased. This result implies that there may be significant utility to using multiple receiver systems when traditional methods of improving performance such as amplifiers and antennas do not provide the necessary benefit.

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