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Exact Distribution of the Amplitude of Adaptively Selected OFDM Signal Samples
Lei WANG Dongweon YOON Sang Kyu PARK
Publication
IEICE TRANSACTIONS on Communications
Vol.E91B
No.1
pp.355358 Publication Date: 2008/01/01 Online ISSN: 17451345
DOI: 10.1093/ietcom/e91b.1.355 Print ISSN: 09168516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: OFDM, adaptive symbol selection scheme, clipping, PAPR reduction,
Full Text: PDF(118.4KB)>>
Summary:
The combination of deliberate clipping and an adaptive symbol selection scheme (ASSS) can be used to reduce the peak to average power ratio (PAPR) for Orthogonal Frequency Division Multiplexing (OFDM) signals. The probability density function (pdf) of a sample's amplitude of an adaptively selected OFDM signal without oversampling has been considered to be approximately equal to the Rayleigh pdf. In this letter, we derive the exact pdf showing the relationship between the probability distribution of the sample's amplitude and the number of candidate OFDM symbols for ASSS. The use of the newly derived pdf can measure the effect of deliberate clipping on the adaptively selected OFDM signal more accurately.

