Effects of HPA nonlinearity on frequency multiplexed OFDM signals

The paper analyzes the performance of the downlink channel of a multimedia interactive service system which transmits the desired information by the frequency multiplexing of several OFDM signals compliant with the DVB-T standard. The effects of the nonlinear distortions introduced by a high power a...

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Bibliographic Details
Published in:IEEE transactions on broadcasting 2001-06, Vol.47 (2), p.123-136
Main Authors: Banelli, P., Baruffa, G., Cacopardi, S.
Format: Article
Language:English
Subjects:
Bit error rate
Channels
Digital video broadcasting
Distortion
Downlink
Frequency division multiplexing
Information analysis
Interactive
Mathematical analysis
Multimedia
Multimedia systems
Nonlinear distortion
Nonlinearity
OFDM
Orthogonal Frequency Division Multiplexing
Performance analysis
Signal analysis
Spectra
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Summary:The paper analyzes the performance of the downlink channel of a multimedia interactive service system which transmits the desired information by the frequency multiplexing of several OFDM signals compliant with the DVB-T standard. The effects of the nonlinear distortions introduced by a high power amplifier on the system performance are evaluated both in terms of the bit error rate (BER) degradation in AWGN channels and of the spectral regrowth. The performance comparison to the case of a single DVB-T signal as well as the benefits of an ideal predistortion is also considered by comparing analytical results to computer simulations.
ISSN:0018-9316
1557-9611
DOI:10.1109/11.948265