Comparison of Superresolution Algorithms for Radio Direction Finding

The problem of high-frequency radio direction finding (HFDF) has perennially been compounded by the interference effects of multicomponent wavefields. The wavefields are generally produced by ionospheric multipath or cochannel interference from other transmitted signals. Because HFDF sytems must operate on short duration signals and are usually restricted to limited antenna array apertures, modern techniques of superresolution spectral analysis are applied to resolve the constituency of multicomponent wavefields. This paper presents a performance comparison of five superresolution spectral algorithms in solving the HFDF wave interference problem.