
For FullText PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.

A LowComplexity PTS Scheme with the Hybrid Subblock Partition Method for PAPR Reduction in OFDM Systems
ShengJu KU Yuan OUYANG Chiachi HUANG
Publication
IEICE TRANSACTIONS on Communications
Vol.E98B
No.11
pp.23412347 Publication Date: 2015/11/01 Online ISSN: 17451345
DOI: 10.1587/transcom.E98.B.2341 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: orthogonal frequency division multiplexing (OFDM), partial transmit sequences (PTS), peaktoaverage power ratio (PAPR),
Full Text: PDF>>
Summary:
The technique of partial transmit sequences (PTS) is effective in reducing the peaktoaverage power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, the conventional PTS (CPTS) scheme has high computation complexity because it needs several inverse fast Fourier transform (IFFT) units and an optimization process to find the candidate signal with the lowest PAPR. In this paper, we propose a new lowcomplexity PTS scheme for OFDM systems, in which a hybrid subblock partition method (SPM) is used to reduce the complexity that results from the IFFT computations and the optimization process. Also, the PAPR reduction performance of the proposed PTS scheme is further enhanced by multiplying a selected subblock with a predefined phase rotation vector to form a new subblock. The timedomain signal of the new subblock can be obtained simply by performing a circularlyshiftleft operation on the IFFT output of the selected subblock. Computer simulations show that the proposed PTS scheme achieves a PAPR reduction performance close to that of the CPTS scheme with the pseudorandom SPM, but with much lower computation complexity.

