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Reducing the PAPR by utilisation of the LDPC code

Daoud, O; Alani, OYK


O Daoud


Peak-to-average power ratio (PAPR) is a major drawback in most multi-carrier communication
techniques such as orthogonal frequency division multiplex system (OFDM). OFDM consists of lots of
independent modulated subcarriers, as a result the amplitude of such a signal can have very large values.
These large peaks increase the amount of intermodulation distortion resulting in an increase in the error rate.
The PAPR of an OFDM signal can be reduced in several ways: selective mapping, Golay sequences, cyclic
coding, clipping and filtering, and multiple signal representation techniques. The authors have improved the
performance of the OFDM system by using low-density parity-check (LDPC) codes as an alternative to turbo
coding in mitigating the PAPR problem which has been used in the pervious works of the authors. The
authors present the design for the proposed (LDPC) code technique that achieves good error correction
performance and is used to lower the PAPR in a multiple-input multiple-output OFDM system. The simulation
results show that 6– 60% reduction in PAPR over current values in the literature can be achieved depending
on the system type.


Daoud, O., & Alani, O. (2009). Reducing the PAPR by utilisation of the LDPC code. IET Communications, 3(4), 520.

Journal Article Type Article
Publication Date Jan 1, 2009
Deposit Date Aug 22, 2014
Journal IET Communications
Print ISSN 1751-8628
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 3
Issue 4
Pages 520
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