Beam Width Performance of the Adaptive Beam Former Based on Pseudo-Interference Technique
In this paper, we examine the beam width performance of the recently addressed robust Capon beam formers (RCB). This adaptive array employs the estimated steering vector, injected noise, and pseudo-interference to provide robustness against direction mismatch. With the generalized side lobe canceller (GSC) as the underlying structure, we first derive the effect of angular mismatch on the estimated interference correlation matrix. Then, a simple approximate expression is presented for output signal-to-interference-plus-noise-ratio (SINR) of this new beam former. Based on this expression, the angular beam width of this robust beam former is investigated. Simulation results verify the analytically predicted performance.
KeywordsAdaptive antenna array Pseudo-interference Angular beam width Robust beam former Interference cancellation
This work was supported by the National Science Council of Taiwan: NSC-100-2632-E-231-001-MY3 and NSC-101-2221-E-231-013.
- 1.Monzingo RA, Miller TW (1980) Introduction to adaptive arrays, vol 28(16). Wiley, New York, pp 378–381Google Scholar
- 2.Capon J (1969) High-resolution frequency-wave number spectrum analysis, vol 57(11). In: Proceeding of IEEE, pp 1408–1418Google Scholar
- 4.Reed I, Mallet J, Brennan L (1974) A multistage representation of the Wiener filter based on orthogonal projections. IEEE Trans Aerosp Electron Syst 10(16):853–863Google Scholar