Abstract:

Due to the increasing traffic demand per user, the wireless networks are in a major transition from a carefully planned set of large tower-mounted base-stations (BSs) to an irregular deployment of distributed BSs. The location of distributed BSs is random essentially, unlike prior studies which assumed the base station to be deployed at fixed location. The studies were used to assume the base station was deployed at a random location in Poisson field, and system performance analysis of interference alignment (IA) with limited feedback in multiple input multiple output interference network is studied. Firstly, the base stations were distributed as a spatial homogeneous Poisson point process in Poisson field. The statistical characteristics of channel state information quantization were obtained, and the approximate analytical expressions of outage probability and network throughput were derived. The optimal base station deploying intensity was calculated by maximizing the lower bound of network throughput. Numerical results show that the expressions can provide sufficient precision for evaluating the systems performance of IA with limited feedback.

Key words: interference alignment, Poisson field, limited feedback, interference network