UL RSSI as a Design Consideration for Distributed Antenna Systems, Using a Radial Basis Function Model for UL RSSI

Abstract

This paper aims to develop a non-linear model for the Uplink Received Signal Strength Indicator (UL_RSSI) during high capacity stadium events. Radial Basis Functions (RBF’s) are used to aid in developing the model for the UL_RSSI as the amount of users in the stadium changes. Air Speech Equivalent (ASE) is used to model users on the uplink. Furthermore a model is derived to assist planning engineers to determine a suitable amount of sectors needed for Distributed Antenna Systems (DAS) that will not cause degradation in the noise floor. Results for the UL_RSSI model prove to follow trending of actual noise floor characteristics during high capacity stadium events with reasonable accuracy. The model was used along with a design example and results if implemented should provide Enhanced Uplink/High Speed Uplink Packet Access (EUL/HSUPA) users with an acceptable Quality of Service.