Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2003-06-02
2008-12-02
Pham, Chi H. (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S252000, C370S311000, C370S334000, C370S465000, C455S452100, C455S461000
Reexamination Certificate
active
07460466
ABSTRACT:
Disclosed are an adaptive pilot symbol assignment method that flexibly controls the number of transmit antennas according to each user's moving speed, channel status, or user request, and assigns proper pilot symbols in the downlink of an OFDMA (Orthogonal Frequency Division Multiplexing Access) based cellular system; and a sub-carrier allocation method for high-speed mobile that allocates some sub-carriers to assign proper pilot symbols for ultrahigh-speed mobile users, and the rest of the sub-carriers to the other users to assign proper pilot symbols to the users, on the assumption that the ultrahigh-speed mobile users have a traffic volume almost insignificant to the whole traffic volume.
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Chang Kyung-Hi
Kim Kwang-Soon
Lee Sok-Kyu
Blakely , Sokoloff, Taylor & Zafman LLP
Electronics and Telecommunications Research Institute
Hom Shick
Pham Chi H.
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