On the performance of joint channel estimation and PAPR reduction scheme

In this paper, we address the performance of joint Peak-to-Average Power Ratio (PAPR) reduction and channel estimation schemes. The target of this work is multifold. First, we propose a novel PAPR reduction scheme for Orthogonal Frequency Division Multiplexing (OFDM) systems: instead of using dedicated pilots for PAPR reduction as with Tone Reservation (TR) method existing in the literature, we propose to use the reserved channel estimation pilots. In this way, we avoid the use of reserved tones and we improve the spectral efficiency. Second, in order to allow their recovery at the receiver, we investigate a multiplicative law to be applied on the transmitted pilots. This law will permit a blind detection at the receiver and avoid sending side information. Third, using the new DVB-T2 standard parameters, the performance of the proposed technique is analyzed and compared with other techniques. We show that the proposed technique is efficient in terms of PAPR reduction value and of spectral efficiency while the channel estimation performance is maintained.