SDR Architectures--Key Features

The advances in SDR technologies require a new architectures to support the reconfigurability of those technologies. In this paper the authors show several architecture setups. Key features of any architecture includes variable bandwidth, sufficient dynamic range, fast retuning and reconfiguration, minimized cost, and energy efficient.



Best regards,
Hall T.

Primer on SDR continued--Cognitive Radio

In continuing last week's post on SDR primer, this week we look at Cognitive Radio which is "a radio that senses or is aware of its operational environment and can dynamically and autonomously adjust its radio operating parameters accordingly" according to Joe Mitola. Basically, the Cognitive radio senses its envionment and learns how to adapt to its environment. While SDR and Cognitive Radio can be a potential panacea for every wireless problem, it appears to be ideally suited for interoperability of radios and reducing interference. A software defined radio can come in various forms such as reconfigurable (can be changed by the user), to policy -based (change is based on a predetermined set of configurations), to cognitive radio (can be changed based on the environment).

Best regards,
Hall T.