Apparatus for controlling inverse fast fourier transform input in long term evolution system
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United States of America Patent
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Dec 26, 2017
Grant Date -
Jul 21, 2016
app pub date -
Dec 29, 2015
filing date -
Jan 21, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is an apparatus for controlling an IFFT input in a LTE system. The apparatus includes: a first multiplexer configured to select a portion of data applied to a first stage of a Fast Fourier Transform (FFT) structure according to a predefined condition from among input data, and assign the selected data to a memory of the first stage; a butterfly operator configured to receive the portion of data selected by the first multiplexer and perform a butterfly operation for the first stage of the FFT structure using the received data; a multiplier configured to output a value obtained by multiplying a result value output from the butterfly operator and a predetermined value together; and a second multiplexer configured to receive a value output via the multiplier, and remaining data not selected by the first multiplexer to output to a second stage of the FFT structure.
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