Multimodal Cooperative Modulation Estimation and Terminal Location for Multisource Sensor Networks

摘要

Modulation/mode identification is an interesting topic in wireless communications. The main problem related to this topic is the recognition of the transmission mode employed in a radio environment. In this work, this problem is addressed in the context of Smart space (SS) applications for a distributed wireless sensor network, in which the sensors are the user radio reconfigurable terminals (UTs as mobile nodes) and the base stations (BSs as fixed nodes). A stand-alone and a cooperative approach to modulation detection by using multiple sensors exposed to different signal levels dependent on their positions are presented. In the case of cooperative identification, the proposed methodology is based on the distributed detection theory. Another problem considered in the paper is the problem of identification of terminal location. While special attention is given to the recognition problem, a preliminary study of the identification of terminal location with both stand-alone and cooperative UTs/BSs is also presented. Theoretical aspects and some numerical results are reported to support the proposed methodologies.