Radio device and method of calibration thereof

Details Radio device and method of calibration thereof Radio device and method of calibration thereof

2005-03-22

2005-03-22

Ghayour, Mohammad H. (Department: 2631)

Pulse or digital communications

Testing

Phase error or phase jitter

Reexamination Certificate

active

06870878

ABSTRACT:
An adaptive array radio base station comprises at least three antenna elements (ANTj(j=1, 2, . . . , n)) and a signal processing circuit (20). In calibration, the difference in a phase rotation quantity and the difference in an amplitude fluctuation quantity between a transmission circuit and a receiving circuit in each transmission system are estimated on the basis of a known signal transmitted from each transmission system and a received signal measured in each transmission system. A phase rotation quantity of a phase shifter (PSj) and an amplitude fluctuation quantity of an attenuator (ATTj) are set on the basis of the results of the estimation. Thus provided are a radio apparatus and a calibration method capable of calibrating transmission characteristics of the transmission circuit and the receiving circuit in a simple structure at a low cost without providing a specific measuring circuit.

REFERENCES:
patent: 5164985 (1992-11-01), Nysen et al.
patent: 0 938204 (1999-08-01), None
patent: 2-265302 (1990-10-01), None
patent: 10-503892 (1998-04-01), None
patent: 11-46180 (1999-02-01), None
patent: 2000013454 (2000-01-01), None
patent: WO-34103 (1995-12-01), None
Proceedings of the IEEE, vol. 55, No. 12,—pp. 2143-2159, Dec. 1967.
IEEE Transactions on Antennas and Propagation, vol. AP-24, No. 5, pp. 585-598, Sep. 1976.
B. Widrow et al.; “Adaptive Signal Processing” —Chapter 6, pp. 99-116. 1985.
R. A. Monzingo et al.; “Introduction to Adaptive Arrays”, A Wiley-Interscience Publication—Chapter 3, pp. 78-105, 1980.
IEE Electromagnetic Waves Series II, Chapter 3, pp. 59-154.
R. T. Compton, Jr.; “Adaptive Antennas”, pp. 6-11—1988.
E. Nicolau et al; “Adaptive Arrays”, ELSEVIER, Chapter 8, pp. 122-163, 1989.

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