Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2011-08-02
2011-08-02
Burd, Kevin M (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S284000, C370S203000
Reexamination Certificate
active
07991091
ABSTRACT:
Multi-carrier transmission is performed without inserting a repetitive signal into guard interval periods. A transmitter provides guard interval periods by using a null signal to save transmission power and prevent the deterioration of the SN ratio. Delayed waves at the head of each received symbol cause high-frequency waves to occur and carriers to interfere with one another. Accordingly, a receiver adds a component following each received symbol to a delayed-wave component at the head of the received symbol. As a result, the delayed-wave component at the head of the received symbol and the added component become continuous in wave form and subcarriers do not interfere with each other.
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Fujita Chihiro
Suzuki Mitsuhiro
Usui Takashi
Burd Kevin M
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Perez James M
Sony Corporation
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