Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2006-08-18
2010-12-07
Ngo, Ricky (Department: 2464)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S491000, C370S343000
Reexamination Certificate
active
07848218
ABSTRACT:
Provided are a virtual multi-antenna method for an orthogonal frequency division multiplexing (OFDM) system and an OFDM-based cellular system. The virtual multi-antenna method includes grouping sub-carriers in a frequency domain of an OFDM symbol and generating at least one group including G sub-carriers; and regarding the G sub-carriers included in the at least one group as multiple channels used in a multi-antenna technique and virtually applying the multi-antenna technique to the transmission and reception of the OFDM symbol. The virtual multi-antenna method can effectively reduce an interference signal and obtain the effects of a spatial division multiple access (SDMA) technique without physically using multiple antennas.
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Ahn Jae-Young
Cho Yong-Soo
Lee Hyo-Jin
Lee Kyu-Jin
Park Kyung-Won
Electronics and Telecommunications Research Institute
Kile Park Goekjian Reed & McManus PLLC
Ngo Ricky
Park Jae Y.
Zaidi Iqbal
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