Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-06-09
2009-10-27
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S316000, C375S229000, C375S285000, C375S259000, C455S059000
Reexamination Certificate
active
07609772
ABSTRACT:
An optimum I/Q imbalance compensating apparatus and method in a zero-IF OFDM receiver. In the apparatus, a first compensator generates a first symbol by removing interference from a second distorted symbol on an (Ns−m+1)thsubcarrier from a first distorted symbol on an mthsubcarrier by a first compensation coefficient in an OFDM FFT signal of Nssubcarriers. A first hard decider generates a first compensated symbol by hard-decision on the first symbol, an error calculator generates an error symbol by subtracting the first received symbol from the first compensated symbol. A second compensator generates a second symbol by eliminating interference from the first distorted symbol from the second distorted symbol using a second compensation coefficient. A second hard decider generates a second compensated symbol by hard-decision on the second symbol, and an adaptive controller updates the first compensation coefficient using the error symbol and the second compensation symbol.
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Ha Ji-Won
Kim Min-Goo
Oh Hyun-Seok
Yu Hyun-Seok
Lam Kenneth
Liu Shuwang
Roylance Abrams Berdo & Goodman LLP
Samsung Electronics Co,. Ltd.
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