A self-reconfigurable receiver architecture for software radio systems

This paper proposes an adaptive digital receiver architecture suitable for Software Defined Radio systems. This receiver is prepared to handle modulation schemes whose symbols belong to a linear, two-dimensional signal space (such as M-PSK or M-QAM). It is capable of identifying key signal parameters (e.g., symbol rate and constellation) and, in an autonomous way, modify its operation accordingly. Four aspects of self-reconfiguration are addressed: baseband filtering, symbol synchronization, carrier synchronization and constellation recognition. The performance of the receiver is evaluated based on simulation results, and several usage scenarios for the proposed architecture are envisaged.