Communication device for receiving and transmitting OFDM...

Multiplex communications – Generalized orthogonal or special mathematical techniques – Plural diverse modulation techniques

Reexamination Certificate

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C370S334000

Reexamination Certificate

active

07085223

ABSTRACT:
A communication device for receiving and transmitting OFDM signals in a wireless communication system, in which each OFDM signal is composed of a plurality of subcarrier signals each being assigned to a respective transmission channel. The device includes a diversity antenna, examination mechanism adapted for examining, individually for each antenna element, at least one subcarrier signal of an OFDM reception signal received by a respective one of the antenna elements and for gaining, from the result of such subcarrier signal examination, attenuation information on attenuation properties of at least some of the transmission channels associated with the respective antenna element and an amplitude adjustment mechanism adapted for adjusting, individually for each antenna element, the amplitude of at least one subcarrier signal of an OFDM transmission signal to be transmitted from a respective one of said antenna elements in accordance with said attenuation information.

REFERENCES:
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patent: 4509206 (1985-04-01), Carpe et al.
patent: 4955073 (1990-09-01), Sugayama
patent: 5203012 (1993-04-01), Patsiokas et al.
patent: 5771224 (1998-06-01), Seki et al.
patent: 5784363 (1998-07-01), Engstrom et al.
patent: 6304611 (2001-10-01), Miyashita et al.
patent: 0 844 765 (1998-05-01), None
patent: 0 881 782 (1998-12-01), None
patent: 2 300 546 (1996-11-01), None

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