Title :
Orthogonal Space Projection (OSP) Processing for Adaptive Interference Cancellation
Author_Institution :
Propagation Res. Assoc., Marietta, GA, USA
Abstract :
An Orthogonal Space Projection (OSP) processing methodology is introduced that achieves interference cancellation within a single time compression interval, e.g. pulse interval for fast time or dwell interval for slow time. The OSP technique can operate in pre-compression or post-compression spaces where covariance matrix development and compression are performed simultaneously. OSP projects the signal and interference into a space that is matched to the signals of interest and into a space that is mismatched to the signals of interest similar to a blocking matrix in conventional adaptive processing methods. The output of the OSP process is a two-dimensional image space that combines signal compression and interference cancellation. A pre-compression OSP technique is applied to array processing for jammer suppression and a two-dimensional array example is used to assess SINR performance.
Keywords :
adaptive signal processing; covariance matrices; radiofrequency interference; adaptive interference cancellation; covariance matrix; image space; orthogonal space projection processing; post compression space; precompression space; single time compression interval; Arrays; Covariance matrices; Interference cancellation; Jamming; Noise; Vectors; Adaptive signal processing; interference cancellation; matched filter; mis-matched filter; waveform modulation;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2014.2319317