Radio apparatus

Details Radio apparatus Radio apparatus

2011-03-15

2011-03-15

Vu, Huy D (Department: 2461)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via frequency channels

C370S480000, C370S498000, C370S500000, C370S445000, C375S345000

Reexamination Certificate

active

07907636

ABSTRACT:
A modem unit inputs a plurality of combinations, of control signal and data signal, which are to use a plurality of subcarriers. In a plurality of combinations the modem unit adds a first known signal for data signals contained at least in a first combination, and in a plurality of combinations inputted to an input unit it adds second known signals for a second combination and the subsequent combinations, respectively, in anterior positions. The modem unit uses part of a plurality of subcarriers for control signals contained respectively in the second combination and the subsequent combinations, and defines a second known signal in a manner that a part corresponding to the part of a plurality of subcarriers is extracted from the first known signal.

REFERENCES:
patent: 2006/0203932 (2006-09-01), Palanki et al.
patent: 2007/0081602 (2007-04-01), Tanaka et al.
patent: 2007/0140377 (2007-06-01), Murakami et al.
patent: 2006-029352 (2006-02-01), None
patent: WO2005050885 (2005-06-01), None
Sinem Coleri, Mustafa Ergen, Anuj Puri and Ahmad Bahai, “Channel Estimation Techniques Based on Pilot Arrangement in OFDM Systems”, IEEE Transactions on broadcasting, vol. 48, No. 3, pp. 223-229, Sep. 2002.

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