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UBC Theses and Dissertations

A feasibility study of intrabuilding wireless communications using low level nominal 60 GHz radiation Siu, Frederick Wing Cheung


The RF (radio frequency) aspect of an IWC (indoor wireless communication) system which operates in the 60 GHz range is designed and implemented. The overall system should be capable of providing indoor office communications for a maximum of 200 basic rate ISDN (integrated services digital network) subscribers, and BER (bit error rate) of 10⁻⁶ or less. The system feasibility study is based on the assumptions of using BPSK (binary phase shift keying) modulation, DSCDMA (direct sequence code division multiple access) spread spectrum technique and an EIRP (effective isotropically radiated power) of 100 milliwatt or less. A line of sight scheme is adopted which makes use of a propagation arrangement that confines the radiation to a region of space seldom occupied in the open office environment. The design of an appropriate antenna system which meets such a requirement is presented. Using the specially designed antennas and commercially available millimetric wave components, a one direction basic RF system is implemented. The indoor propagation characteristics and fading statistics of the system are experimentally obtained. It is found that the fading is Rician, with a K ratio (fading signal power/steady signal power) of less than -20.2 dB, and that the RF system can support the type of communication service proposed.

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