Droop Compensation Technique with Simple Structure for OFDM mobile transmitter

Generally the system clock is same to OFDM time sample rate at OFDM mobile systems to reduce the power consumption of handheld systems. For this reason, the droop phenomena that both edges of frequency channel band fall down is occurred by the sample-and-hold operation of digital to analog converter...

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Bibliographic Details
Published in2006 IEEE International Symposium on Consumer Electronics pp. 1 - 4
Main Authors Jaeho Jung, Sungmin Kim, Kwangchun Lee
Format Conference Proceeding
LanguageEnglish
Published IEEE 2006
Subjects
Clocks
Digital to analog converter (DAC)
Digital-analog conversion
Energy consumption
Frequency conversion
Frequency measurement
Frequency response
Inverse fast fourier transformation (IFFT)
Inverse sinc function
Measurement standards
OFDM
Orthogonal frequency division multiplexing (OFDM)
Table lookup
Transmitters
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Summary:Generally the system clock is same to OFDM time sample rate at OFDM mobile systems to reduce the power consumption of handheld systems. For this reason, the droop phenomena that both edges of frequency channel band fall down is occurred by the sample-and-hold operation of digital to analog converters. In this paper, we have proposed the compensation technique to predistort the OFDM subcarriers with the inverse sine before the inverse fast Fourier transformation operation. The proposed technique can be implemented with the one multiplier and look-up table to save inverse sine weighting values operating to the low frequency. We have presented the simulation results on the droop compensation with WiBro standard based on OFDMA in Korea and the measurement results on the droop compensated frequency response
ISBN:9781424402168
1424402166
ISSN:0747-668X
DOI:10.1109/ISCE.2006.1689412