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- Garcia, MJF, et al.
(författare)
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Peak power reduction for OFDM systems with orthogonal pilot sequences
- 2006
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Ingår i: IEEE Transactions on Wireless Communications. - 1536-1276. ; 5:1, s. 47-51
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, a novel peak-to-average power reduction approach for orthogonal frequency division multiplexing (OFDM) has been addressed. Two-dimensional pilot-symbol assisted modulation (2D-PSAM) is employed in coherent OFDM for channel estimation, and it is based on inserting known symbols spread throughout the 2D time-frequency grid. These pilot symbols are employed to simultaneously perform distortionless peak power reduction with a suboptimum technique named orthogonal pilot sequences (OPS), which reduces additional system complexity and side information compared to optimum pilot values. This proposal attains a further step over other previous works, since this set of sequences allows blind detection at the receiver without prior knowledge of any side information.
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