Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2011-05-10
2011-05-10
Pham, Chi H (Department: 2471)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S329000, C375S260000
Reexamination Certificate
active
07940641
ABSTRACT:
A wireless communication apparatus by which the orthogonality between the pilot signal sequences between adjacent sectors or cells can be prevented from collapsing due to a frequency selectivity fading. In this apparatus, modulating parts (102-1to102-m) modulate encoded data to generate data symbols, and a pilot symbol generating part (103) modulates a received pilot signal sequence to generate pilot symbols. A multiplexing part (104) time multiplexes the pilot symbols and the data symbols. Orthogonal Variable Spreading Factor (OVSF) sequences are used as the pilot signal sequences. The pilot symbol generating part (103) receives an OVSF sequence, among a plurality of OVSF sequences having the same sequence length but being orthogonal to each other, which is orthogonal to an OVSF sequence used as a pilot signal sequence in an adjacent sector and which is orthogonal to that OVSF sequence in a unit shorter than the sequence length.
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Hoshino Masayuki
Imamura Daichi
Nishio Akihiko
Dickinson Wright PLLC
Faroul Farah
Panasonic Corporation
Pham Chi H
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