Patent ID: 9300382
Filing Date: 2016-03-29
CPC Classification: H04B

Claim Text:
1. A wireless signal processor which cooperates with a first wireless apparatus having a first antenna and a second antenna, and a second wireless apparatus having a third antenna and a fourth antenna, the wireless signal processor comprising: a first calculator which calculates a first calibration coefficient for making a first ratio of transfer functions of first reception and transmission systems for the first antenna and a second ratio of transfer functions of second reception and transmission systems for the second antenna the same as each other; a second calculator which calculates a second calibration coefficient for making a third ratio of transfer functions of third reception and transmission systems for the third antenna and a fourth ratio of transfer functions of fourth reception and transmission systems for the fourth antenna the same as each other; a first estimator which estimates a first transfer function of a path from the first wireless apparatus to the second wireless apparatus using a signal obtained by receiving, at a first reception weight by the second wireless apparatus, a first calibration signal transmitted from the first wireless apparatus using a first transmission weight determined using the first calibration coefficient; a second estimator which estimates a second transfer function of a path from the second wireless apparatus to the first wireless apparatus using a signal obtained by receiving, at a second reception weight by the first wireless apparatus, a second calibration signal transmitted from the second wireless apparatus using a second transmission weight determined using the second calibration coefficient; and a third calculator which calculates a third calibration coefficient for using the first transfer function and the second transfer function to make the first to fourth ratios the same as one another.