Base station placement for in-building mobile communication systems to yield high capacity and efficiency

In this paper a study is made of the problem of placing base stations to yi eld high capacity and efficiency in an in-building direct-sequence code-div ision multiple-access wireless Communication system. A key requirement for solving this problem is a reliable but simple model of in-building propagat ion, A: number of propagation models are considered as part of a system per formance analysis and are found to produce widely ranging,levels of accurac y, Correlated shadowing is identified as being a 'key' in-building propagat ion characteristic that has the potential to strongly influence system perf ormance, Propagation models that included correlated shadowing are shown to produce the most accurate estimates of outage probability when there are a number of interferers facing a user. Base station deployment is shown to:b e a dominant factor influencing the levels of correlated shadowing, and con sequently, base station deployment is shown tb have major implications on s ystem performance, The system performance for a variety of base station dep loyment strategies has been determined. Results indicate that there is a tr adeoff between system simplicity and performance.