NDLI: Performance evaluation of OFDM transmission with conventional and two-branch combining power amplification schemes

Content Provider	IEEE Xplore Digital Library
Author	Dinis, R. Gusmao, A.
Copyright Year	1996
Description	Author affiliation: CAPS, Inst. Superior Tecnico, Lisbon, Portugal (Dinis, R.)
Abstract	It is recognized that OFDM schemes (orthogonal frequency division multiplexing) offer many advantages for signalling at high data rates over time dispersive channels. However, they exhibit strong envelope fluctuations, which is considered to be an important drawback over many single-carrier schemes, since the inherently high peak-to-mean envelope power ratio leads to heavy power amplification requirements. We present a new approach to the performance evaluation of OFDM transmission with nonlinear power amplification. This approach can be employed for both conventional, single-branch, amplification and two-branch combining amplification, whenever a high number of subcarriers is assumed, and relies on the decomposition of the power amplified signals into uncorrelated "useful" and "self-interference" components. A simple analytical method is presented for evaluating BER performances, within the proposed approach, for a selected OFDM/QAM multichannel system. The analytical results are in good agreement with simulation results and allow simple optimization of the operating points for the power amplification within the system, as well as simple comparisons of the several amplification schemes.
Starting Page	734
Ending Page	739
File Size	548436
Page Count	6
File Format	PDF
ISBN	0780333365
DOI	10.1109/GLOCOM.1996.594458
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-11-18
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fluctuations OFDM modulation Nonlinear distortion Power amplifiers Frequency division multiplexing Dispersion Digital audio broadcasting Interference Performance analysis Bit error rate
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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