Fluid wireless -dynamic spectrum allocation and spectrum-monitoring application using reconfigurable radio and OFDM
Keith E. Nolan, Linda Doyle, Philip MacKenzie · 2005
This paper presents a description, further enhancements to, and an analysis of a multi-user Orthogonal Frequency Division Multiplexing (OFDM)-based dynamic spectrum management technique called a Multiple User DataEnhanced Radio Server (MUDERS). The term ‘fluid wireless’ is used to describe the discrete-time ‘waterflowing around obstacles’ interference-avoidance and intentional sub-band avoidance approach used to maximise channel capacity usage. The time-varying radio reconfiguration mechanisms required to implement this technique are also described including a means of indirect spectrum-monitoring Presented in this paper are results describing how this technique improves data-throughput and robustness of wireless communications links on a common frequency band. In addition, this paper describes how interference-free co-existence of primary and opportunistic secondary users of a wireless medium can be achieved.