Modified SLM scheme with low complexity for PAPR reduction...

Details Modified SLM scheme with low complexity for PAPR reduction... Modified SLM scheme with low complexity for PAPR reduction...

2011-04-19

2011-04-19

Vu, Huy D (Department: 2461)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S210000

Reexamination Certificate

active

07929414

ABSTRACT:
Provided are an apparatus and method for reducing a PAPR with less computation complexity without distortion using a selected mapping scheme (SLM) in an OFDM system. The method includes: generating a plurality of OFDM signal sequences by performing an inverse fast Fourier transform (IFFT) operation on input symbol sequences, which are probabilistically independent and have identical information; linearly combining the plurality of OFDM signal sequences by using complex numbers; and generating different OFDM signal sequences based on the linear combination. Accordingly, the number of phase sequences can be increased without almost increasing a computation amount of SLM.

REFERENCES:
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patent: 2007/0217329 (2007-09-01), Abedi
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patent: 20040056791 (2004-07-01), None
patent: WO2005025102 (2005-03-01), None
A Low-Complexity Selected Mapping Scheme for peak-to-average Power Ratio Reduction in OFDM Systems. by Wang et al. 2004.
International Search Report of the Patent Cooperation Treaty in counterpart foreign Application No. PCT/KR2007/004239 filed Sep. 3, 2007.

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