Radio device

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

Reexamination Certificate

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Details

C455S063400

Reexamination Certificate

active

07069054

ABSTRACT:
A first reception circuit (SR1) separates a signal from a desired terminal among signals from an adaptive array antenna (#1to #4), based on a reception weight vector calculated in a reception weight vector calculator (20.1). A remodulation circuit (32.1) generates a first replica signal from a signal of a demodulated desired wave. A replica generating circuit (40.1) multiplies signals from a plurality of antennas by a weight vector for an interfering wave from a second reception circuit (SR2), and generates a second replica signal corresponding to a signal from an interfering wave terminal. A reception response vector calculator (24.1) derives an impulse response of a propagation path of the signal from the desired terminal, based on the first and second replica signals.

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B. Widrow et al.; Proceedings of the IEEE, vol. 55, No. 12, pp. 2143-2159, Dec. 1967. Discussed in the specification.
S. P. Applebaum, IEEE Transactions on Antennas and Propagation, vol. AP-24, No. 5, pp. 585-598, Sep. 1976. Discussed in the specification.
H. Suzuki et al.; Technical Report of IEICE, RCS93-84, pp. 37-44. Discussed in the specification.
S. C. Swales et al.; IEEE Transactions on Vehicular Technology, vol. 39, No. 1, pp. 56-67, Feb. 1990. Discussed in the specification.
T. Ohgane et al.; IEEE 1997, vol. 2, pp. 725-729, May 1997. Discussed in the specification.
Y. Katoh et al.; IEICE Transactions B-II, vol. J81-B-II, No. 1, pp. 1-9, Jan. 1998. Discussed in the specification.
Y. Doi et al.; Technical Report of IEICE, RCS97-68 pp. 27-32, (Jul. 1997). Discussed in the specification.

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