Date of Award

Spring 1987

Degree Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Electrical Engineering

First Advisor

Ishii, T. K.

Second Advisor

Jeutter, Dean C.

Third Advisor

Jodat, Ronald W.


The realization of a direct-sequence spread-spectrum transmitter at 915 MHz for use in an indoor communication system for building automation control is presented. The transmitter utilizes a phase-reversal keying to modulate the carrier at a chipping rate of 5 MHz. The theory presented develops a description of all the signals present in the transmitter circuitry. Design details and measurements associated with the construction of a laboratory prototype and a compact microstrip prototype are presented and documented. Propagation profiles associated with indoor propagation sites show that average attenuation is typically 2 dB per meter. A discussion of direct-sequence spread-spectrum interference avoidance capabilities shows that this technique improves the reliability of indoor communications.



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