Mixed-Signal Parallel Compressive Spectrum Sensing for Cognitive Radios

Abstract EN

Wideband spectrum sensing for cognitive radios requires very demanding analog-to-digital conversion (ADC) speed and dynamic range.

In this paper, a mixed-signal parallel compressive sensing architecture is developed to realize wideband spectrum sensing for cognitive radios at sub-Nqyuist rates by exploiting the sparsity in current frequency usage.

Overlapping windowed integrators are used for analog basis expansion, that provides flexible filter nulls for clock leakage spur rejection.

A low-speed experimental system, built with off-the-shelf components, is presented.

The impact of circuit nonidealities is considered in detail, providing insight for a future integrated circuit implementation.