Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Reexamination Certificate
2006-06-27
2006-06-27
Phan, Dao Linda (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
C342S442000
Reexamination Certificate
active
07068221
ABSTRACT:
An incoming radio wave is received by array antenna elements which constitute an array antenna, and the correlation between the received data of some array antenna elements is calculated to form a correlation matrix which is not affected by the additive noise at each antenna element. Then a noise subspace is obtained from the correlation matrix by a simple linear operation based on the partition of an array response matrix and is used to estimate the direction of signal (i.e., radio wave) impinging on the array antenna. Because the evaluation of all correlations between the array data received by array antenna elements is not needed, and the eigendecomposition process is avoided, the computational load of the proposed direction estimation technique is reduced, and the noise insensitivity is improved.
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Kohzoh Ohshima et al. A study on correlation matrix calculation for the MUSIC Algorithm. Asahikawa National College of Technology and Graduate School of Engineering, Hokkaido University, IEICE Transactions vol. J84-B No. 1 pp. 146-149.
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