Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2005-04-26
2005-04-26
Liu, Shuwang (Department: 2815)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S143000, C375S150000, C375S316000, C398S161000, C398S182000, C398S085000, C398S048000, C716S030000, C716S030000, C716S030000
Reexamination Certificate
active
06885713
ABSTRACT:
An electromagnetic matched filter based multiple access communications system having a source of modulated pulses from a digital data stream; an initial filter which shapes the incoming modulated pulse into a desired pulse for transmission across the communication medium; a second filter, identical to the initial filter, which is matched to the pulse which exit the communication medium, a detector which converts the modulated pulse stream into the original digital data stream, and signals which are designed with specific mathematical properties which make the system efficient and minimizes crosstalk between channels. The signals decay rapidly from the central lobe at a higher than 1/x rate and the zero points of the autocorrelation function having high order multiplicities. The type of system allows multiplexing of multiple data streams with much greater flexibility, robustness, and density.
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Choi Seung
Healy Dennis
Olson Tim
Osterberg Ulf
Chu Chris C.
Comlink 3000 LLC
DLA Piper Rudnick Gray Cary US LLP
Liu Shuwang
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