Studying and mitigating the impact of GPS localization error on radio environment map construction

Localization errors can play an important role in measurements of radio propagation or spectrum utilization, especially in urban environment where GPS localization accuracy is highly varying. In this paper we present a low cost and simple method for mitigating the impact of localization errors, based on multiple GPS receivers. The presented results are based primarily on performance evaluation of multiple GPS receivers based method under realistic conditions. We show how to reduce the time needed to estimate the statistics of the spatial radio environment by combining the input of multiple GPS sensors. We also present a simple scenario for small cell size networks based on real measurements in three distinct environments, where the localization errors are the determining factor of the performance of such systems.