Multiplex communications – Generalized orthogonal or special mathematical techniques
Reexamination Certificate
2005-11-16
2009-10-27
Ngo, Ricky (Department: 2416)
Multiplex communications
Generalized orthogonal or special mathematical techniques
C370S252000, C370S319000, C370S344000
Reexamination Certificate
active
07609609
ABSTRACT:
An apparatus and method is provided to process a digital signal in an orthogonal frequency division multiple access (OFDMA) wireless communication system. In the apparatus, a memory stores the number of subcarriers allocated to a mobile terminal and stores an inverse discrete Fourier transform (IDFT) coefficient. A controller outputs a mode selection signal indicating a transmission mode or a reception mode. An inverse fast Fourier transform (IFFT) block multiplies a first result obtained by determining a bitwidth for the IDFT coefficient according to the number of subcarriers by a second result obtained by determining a bitwidth for data according to the number of subcarriers.
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Masayuki Nakanishi et al., “Reduction Of FFT Circuit Area For OFDM Demodulator Based On Skipping-Point Representation”, 2004 IEEE Asia- Pacific Conference on Advanced System Integrated Circuits, Aug. 4-5, 2004, pp. 430-431.
Gu Young-Mo
Kim Min-Goo
Song Seong-Wook
Song Yong-Chul
Ngo Ricky
Oveissi David
Roylance, Abrams, Berdo and Goodman LLP
Samsung Electronics Co,. Ltd.
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