An adaptive Software Radio receiver architecture for linear bidimensional modulations

This paper proposes a new, self-reconfigurable architecture which can be used to perform Physical Layer functions in Software Radio receivers. The receiver is capable of handling any digital modulation, as long as its symbols belong to a linear, two-dimensional signal space (e.g., M-PSK and M-QAM). It operates by identifying key parameters of the incoming signal (such as symbol rate and constellation type), which are then used to dynamically adjust several receiver blocks. Five main aspects of selfreconfiguration are analyzed: baseband filtering, symbol rate estimation, 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 presented.