AbstractThe peak-to-average power ratio (PAPR) of an orthogonal frequency division
multiplexing signal is normally very large and is crucial for the analog amplifier in the
transmitter. It is therefore necessary to reduce the PAPR before the signal is transmitted. In
this paper, a PAPR reduction scheme is presented based on the partial transmit sequence
(PTS) method. By allowing each subblock of data to be rotated by an arbitrary angle,
a simple yet efficient phase search algorithm is proposed. With a prespecified number of
iterations, the proposed method gives the best phase vector for a combination of data blocks
to achieve the smallest PAPR value. Our simulation results show that the proposed scheme
provides significant computational savings while yielding a performance similar to that of
the conventional PTS method.
[1]
Heung-Gyoon Ryu,et al.
A new PAPR reduction scheme: SPW (subblock phase weighting)
,
2002,
IEEE Trans. Consumer Electron..
[2]
C. Tellambura,et al.
Reduced complexity PTS and new phase sequences for SLM to reduce PAP of an OFDM signal
,
2000,
VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026).
[3]
Nelson Sollenberger,et al.
Peak-to-average power ratio reduction of an OFDM signal using partial transmit sequences
,
2000,
IEEE Communications Letters.
[4]
Chintha Tellambura,et al.
Improved phase factor computation for the PAR reduction of an OFDM signal using PTS
,
2001,
IEEE Communications Letters.