Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2010-08-13
2011-12-13
Phunkulh, Bob (Department: 2477)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S210000, C375S267000
Reexamination Certificate
active
08077599
ABSTRACT:
An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.
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Strawczynski Leo
Tong Wen
Wu Shiquan
Mintz Levin Cohn Ferris Glovsky & Popeo P.C.
Nortel Networks Limited
Phunkulh Bob
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