Theoretical analysis on local mean signal power for wireless field strength coverage

The estimation of local mean signal power in wireless field strength coverage is of utmost importance in the planning of base stations in wireless mobile cellular communications systems. Many related topics about the estimation of local mean signal strength are based on Lee´s law, which has some restrictions in the real implementation. While, in the construction of our native railway, a 4 cm sampling interval is adopted in the engineering implementation. However, there is no any theoretical basis for this sampling value. In this paper, theoretical analysis and simulations are carried out in determining the statistical interval, sampling interval, confidence degree and confidence interval. Theoretical value for the variance is derived when the sampling points are correlated with each other. The establishing basis for confidence degree is proposed. Some important conclusions about the determination of local mean power are drawn through simulations and corresponding analysis.