Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-10-02
2007-10-02
Kumar, Pankaj (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
09919917
ABSTRACT:
Method of estimating the channel and the direction of arrival of a signal transmitted by a transmitter and received by an array of antennae after being propagated along at least one path, comprising, for each path, a first step of estimating phase differences (ξl) in the signals received by the different antennae in the array, a second step of estimating the angle of arrival (θ) of the signal as well as the phase rotation (ν) undergone by the signal along the said path from the said phase differences and a third step of estimating the attenuation (α) undergone by the signal along the said path from the estimated values ({circumflex over (ν)}, {circumflex over (θ)}) of the phase rotation and the angle of arrival.
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M. C. Vanderveen, et al., IEEE Communications Letters, vol. 1, XP-000643014, pp. 12-14, “Joint Angle and Delay Estimation (Jade) for Multipath Signals Arriving at an Antenna Array”, Jan. 1997.
C-S. Shieh, et al., IEEE Transactions on Antennas and Propagation, vol. 48, No. 7, XP-002167981, pp. 1115-1124, “Direction of Arrival Estimation Based on Phase Differences Using Neural Fuzzy Network”, Jul. 1, 2000.
Kumar Pankaj
Mitsubishi Denki & Kabushiki Kaisha
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