Receiver window shaping in OFDM to mitigate narrowband...

Details Receiver window shaping in OFDM to mitigate narrowband... Receiver window shaping in OFDM to mitigate narrowband...

2011-08-30

2011-08-30

Tran, Khai (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

08009750

ABSTRACT:
A receiver window for symbol extraction is provided. A symbol is spread across a plurality of sub-carriers of a frequency band for transmission. If the frequency band is affected by narrowband interference, the receiver window concentrates the narrowband interference energy to minimize its effect on distant sub-carriers within the frequency band. The receiver window is shaped for extracting the symbol from the frequency band, wherein the receiver window has a starting point before the start of the symbol. The receiver window overlaps a previous receiver window for the previous adjacent symbol on the same frequency band. The receiver window is shaped by overlapping and adding a channel impulse response segment from a zero-padded portion of the symbol to the beginning of the symbol and overlapping and adding a second portion from the previous zero-padded symbol (from the same frequency band) to the end of the symbol.

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Muschallik C:“Zeitfensterung Eines OFDM-Signals Zur Berbesserung Des Stoerabstands in Empfaenger Time-Windowing an OFDM Signal to Improve the Signal-To-Noise Ration the Receiver”Rundfunktechnische Mitteilungen,Mensing.Norderstedt vol. 40,No. 3,Sep. 1, 1996,XP000624656.

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