1085684-A2 is referenced by 38 patents and cites 7 patents.

Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband. The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

Title
Radio base station with array antenna and transmission calibration
Application Number
EP20000120040 20000914
Publication Number
1085684 (A2)
Application Date
September 14, 2000
Publication Date
March 21, 2001
Inventor
Niida Sumaru
JP
Inoue Takashi
JP
Ishida Yuji
JP
Suzuki Toshiro
JP
Doi Nobukazu
JP
Kuwahara Mikio
JP
Assignee
Kdd
JP
Hitachi
JP
IPC
H04B 07/08
H04B 07/04
H04B 17/00
H04B 17/00
H04B 07/26
H04B 07/08
H04B 07/02
H01Q 03/26
H04B 17/00
H04B 07/26
H04B 07/08
H04B 07/02
H01Q 03/26
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