Multiplex communications – Communication over free space – Combining or distributing information via frequency channels
Reexamination Certificate
2011-06-21
2011-06-21
Ferris, Derrick W (Department: 2463)
Multiplex communications
Communication over free space
Combining or distributing information via frequency channels
Reexamination Certificate
active
07965697
ABSTRACT:
A signal generation apparatus and signal receiving apparatus according to an Interleaved Frequency Division Multiple Access scheme is provided. The signal generation apparatus generates a plurality of complex symbols by digital-modulating a plurality of data symbols, and rotates the generated plurality of complex symbols in a plurality of each different phase angles. The signal generation apparatus generates a plurality of transmission symbols by repeating a plurality of rotated complex symbols at predetermined times, and rotating the repeatedly generated plurality of transmission chips in phase angles of an orthogonal phase sequence for the respective users. When the signal receiving apparatus receives the plurality of transmission symbols generated as described above, the maximum diversity gain may be obtained.
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Written Opinion for PCT/KR2006/003298 dated Nov. 17, 2006.
Kwon Dong-Seung
Lee Seung-Joon
Oh Jong-Ee
Anwar Mohammad
Electronics & Telecommunications Research Institute
Ferris Derrick W
Kile Park Goekjian Reed & McManus PLLC
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