Apparatus and method for estimating and compensating time offset and/or carrier frequency offset in MIMO system based OFDM/OFDMA

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8165249
APP PUB NO 20100008216A1
SERIAL NO

12439514

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention relates to an apparatus and method for estimating and compensating for a time offset and a carrier frequency offset in a Multiple Input Multiple Output (MIMO) communication system that supports Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiplexing Access (OFDMA). According to the present invention, a phase difference of pilot signals of the same transmitting antenna, which are received through receiving antennas, is calculated. An arc tangent operation is then carried out on the phase difference of the pilot signals to calculate a time offset linear phase and/or a carrier frequency offset linear phase. Further, a time offset compensation value and/or a carrier frequency offset compensation value are found by employing the time offset linear phase and/or the carrier frequency offset linear phase. A time offset and/or a carrier frequency offset with respect to pilots and data are compensated for by employing the time offset compensation value and/or the carrier frequency offset compensation value.

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Patent Owner(s)

  • POSDATA CO., LTD.;GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ji, Sang-Bae Yongin-si, KR 3 60
Kim, Byung-Chul Yongin-si, KR 145 1662
Li, Zheng Zi Seongnam-si, KR 8 95

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