A dynamically reconfigurable architecture enabling all-digital transmission for cognitive radios

The proliferation of different wireless standards pushes an additional research effort towards the development of new agile radios, capable of adapting its communication parameters in order to meet the channel conditions, network restrictions and user demands. This change in the wireless communications paradigm requires the development of new radios with very flexible physical layers. In this paper we present a new reconfigurable ΣΔ-based transmitter architecture supporting multichannel multimode data transmission. The high flexibility of this architecture enables a data transmission scenario where the frequencies of the carriers and the spectral masks can be easily changed through software, making this agile transmitter interesting for use in cognitive radio-based applications.