Improving indoor signal coverage by use of through-wall passive repeaters

Improving indoor coverage of wireless networks is an important issue for service providers and users alike. Standard procedures include the deployment of active in-building repeaters and the careful selection of transmission power levels for base stations. Various manufacturers also offer passive repeaters for enhancement of cellular signals in automobiles. In this paper we study the improvement in coverage attainable by use of low-cost through-wall passive repeaters. The analysis considers various situations of signal propagation.