Transmitting and receiving apparatus and method in adaptive...

Details Transmitting and receiving apparatus and method in adaptive... Transmitting and receiving apparatus and method in adaptive...

2007-04-17

2007-04-17

Issing, Gregory C. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

C342S174000

Reexamination Certificate

active

10974272

ABSTRACT:
Disclosed are a transmitting and receiving apparatus and method in an adaptive array antenna system capable of real-time calibration. Transfer functions in the transmitting and receiving apparatus are estimated by injecting a calibration signal to each of transmit and receive channels and analyzing the signals that has passed through the transmit and receive channels. An RF CW sinusoidal signal of a single frequency can be used as the calibration signal to simplify a process of signal processing in a baseband. In addition, in the calibration of the receiving apparatus, gains of all receive channels are controlled using an identical signal. Thus, a relative transfer function characteristic of the receive channels is constant irrespective of the gains of the receivers.

REFERENCES:
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patent: 6157343 (2000-12-01), Andersson et al.
patent: 6480153 (2002-11-01), Jung et al.
patent: 2002/0057660 (2002-05-01), Park et al.
patent: 2004/0070533 (2004-04-01), Azuma
patent: 1020030034259 (2003-05-01), None

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