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Interference Cancellation In Wideband Receivers Using Compressed Sensing, Tejaswi C. Peyyeti
Interference Cancellation In Wideband Receivers Using Compressed Sensing, Tejaswi C. Peyyeti
Masters Theses 1911 - February 2014
Previous approach for narrowband interference cancellation based on compressed sensing (CS) in wideband receivers uses orthogonal projections to project away from the interference. This is not effective in the presence of nonlinear LNA (low noise amplifier) and finite bit ADCs (analog-to-digital converters) due to the fact that the nonidealities present will result in irresolvable intermodulation components and corrupt the signal reconstruction. Cancelling out the interferer before reaching the LNA thus becomes very important. A CS measurement matrix with randomly placed zeros in the frequency domain helps in this regard by removing the effect of interference when the signal measurements are …