Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2011-04-19
2011-04-19
Payne, David C. (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
07929639
ABSTRACT:
The present invention relates to a device for compensating a radio frequency distortion caused by a sample/hold operation of a digital/analog converter in an orthogonal frequency division multiplexing (OFDM) transmission system, and a method thereof. In a digital transmission system, an edge frequency signal of a transmission signal band is distorted by a sample/hold operation of a digital/analog converter such that a signal attenuation is generated at a frequency domain by a sync function having a zero point at a sample frequency of a transmission signal. In the present invention, the signal distortion may be compensated by multiplying a coefficient of an inverse sync function by a signal weight value at the frequency domain, and it may be compensated by using a single multiplier and a lookup table storing the coefficient of the inverse sync function.
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Jung Jae-Ho
Kang Byung-Su
Kim Joon-Hyung
Kwon Heon-Kook
Lee Kwang-Chun
Electronics and Telecommunications Research Institute
Ladas & Parry LLP
Panwalkar Vineeta S
Payne David C.
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