Array antenna receiving device
AssigneeFujitsu Limited
InventorsShuji Kobayakawa, Yoshinori Tanaka, Masafumi Tsutsui
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Abstract
An array antenna receiving device which compensates a phase deviation to perform an efficient beam forming while keeping phase difference information between receivers determined by the arrival direction of a user signal in a communication area to which an antenna element is directive and the array of antenna elements in a radio base station. An analog beam former provides a composite beam so that a phase difference between adjacent beams may have a fixed value determined by beams to be selected. A phase compensator provides digital signals of receivers with phase correction quantities based on any one of the digital signals so that phase differences between the antenna elements may have a fixed value.
Claims11
An array antenna receiving device comprising:
- a plurality of antenna elements arrayed in parallel for receiving input signals;
- an analog beam former for combining the input signals into composite beams in such a way that phase differences between adjacent beams have respectively fixed values determined relative to selected output beam combination;
- a plurality of receivers which convert the composite beams of the beam former into digital signals;
- and
- a phase compensator which compensates the digital signals with phase correction quantities thereby removing, relative to any one of the digital signals, phase deviations from the respective fixed values of phase differences in order for said digital signals to maintain said fixed values.
Dependencies are inferred from the claim text.