Development of a low cost spread spectrum radio link
Nathan R. Jacob · Mspace (University of Manitoba) · 1990
The purpose of the project described in this thesis is to design, implement and test a low cost spread spectrum radio system for operation in the 900 MHz band in order ro demonstrate the feasibility of a low cost wireless data link which does not require licensing.Recently introduced radio frequency emissions regulations allow civilian applications of spread spectrum systems which do not require licensing, and which can operate with up to one watt of output power with loose frequency stability requirements.Thís has made wireless data link technology suitable for applications which require flexible and economical communications capability.This paper describes some common spread spectrum techniques and proposes a number of possible configurations for a low cost spread spectrum system.A novel synchronization and tracking technique is developed and used in the design of a general purpose system which is useful for a number of wireless data link applications such as low cost remote control, locating and recovery, and personal computer data links.Schematics, cost summary and performance of the prototype system are given.