Transmission/reception apparatus and method for frequency...

Details Transmission/reception apparatus and method for frequency... Transmission/reception apparatus and method for frequency...

2011-08-09

2011-08-09

Corrielus, Jean B (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S349000, C370S206000

Reexamination Certificate

active

07995689

ABSTRACT:
An apparatus and a method can improve the performance of a smart antenna system for signal processing in the frequency domain. The method includes: performing Fast Fourier Transform (FFT) on a plurality of incoming signals received through antennas according to a predetermined FFT window; detecting a boundary of an OFDM symbol and setting the FFT window with a margin as large as a predetermined FFT window offset with reference to the detected symbol boundary; receiving the FFT window offset and generating an FFT window calibration signal; and multiplying the FFT-processed incoming signals by the FFT window calibration signal. The method can improve the reception performance of a base station by compensating for the multi-path channel by using an RX FEQ coefficient obtained by a receiver of a terminal as an FEQ weight of a transmitter of the terminal. Further, the method can generate a uniform non-directional beam by generating a variable omni-directional beam pattern in a smart antenna system.

REFERENCES:
patent: 6058121 (2000-05-01), Kim et al.
patent: 6798738 (2004-09-01), Do et al.
patent: 7023938 (2006-04-01), Kapoor et al.
patent: 7139338 (2006-11-01), Wilson et al.
patent: 7643566 (2010-01-01), Hwang et al.
patent: 2006/0176802 (2006-08-01), Ko et al.

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