Reducing the PAPR by utilisation of the LDPC code
Daoud, O and Alani, OYK 2009, 'Reducing the PAPR by utilisation of the LDPC code' , IET Communications, 3 (4) , p. 520.
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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.
|Schools:||Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)|
|Journal or Publication Title:||IET Communications|
|Funders:||Funder not known|
|Depositing User:||Institutional Repository|
|Date Deposited:||22 Aug 2014 16:11|
|Last Modified:||29 Oct 2015 00:18|
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