Title:
【発明の名称】無線装置およびそのキャリブレーション方法
Document Type and Number:
Japanese Patent JP3332911
Kind Code:
B2
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.
Inventors:
Yoshiharu Doi
Toshinori Iinuma
Toshinori Iinuma
Application Number:
JP2000564314A
Publication Date:
October 07, 2002
Filing Date:
August 02, 1999
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01Q3/26; H04B7/04; H04B17/19; H04B17/29; H04W16/28; H04W24/02; H04W24/06; H04W88/08; (IPC1-7): H04B7/08; H01Q3/26
Domestic Patent References:
| JP1146180A | ||||
| JP200013454A |
Attorney, Agent or Firm:
Fukami Hisaro (3 outside)