Cognitive Radio Low-Energy Signal Analysis Sensor Integrated Circuits (CLASIC): A Broadband Mixed-Signal Iterative Down Conversion Spectrum Analyzer for Signal Recognition Applications.

摘要

This research addressed the design of spectrum channelizers spanning a frequency range from baseband to several GHz. The work demonstrates power-efficient architectures that channelize the input spectrum in the analog or mixed-signal domain, in order to reduce the performance and dynamic range burden on the baseband processors that may be utilized for signal sensing or detection tasks in the digital domain. The approaches allow for full or partial spectrum analysis that can be adapted based on system requirement. Dynamic range enhancement based on active interference cancellation can be implemented. A key aspect to the channelizers is that they minimize the requirement for independent frequency synthesizers, and allow for spectrum decomposition based on the use of a single primary clock.