Abstract
High Peak to Average Power Ratio (PAPR) is a critical issue in multicarrier communication systems using Orthogonal Frequency Division Multiplexing (OFDM), as in the Second Generation Terrestrial Digital Video Broadcasting (DVB-T2) system. This problem can result in large performance degradation due to the nonlinearity of the High Power Amplifier (HPA) or in its low power efficiency. In this paper, we evaluate the performance of different Tone Reservation-based techniques for PAPR reduction in DVB-T2 context. Also, we propose an iterative TR-based technique called “One Kernel One Peak” (OKOP). Simulation results and performance comparison of these techniques in terms of gain in PAPR reduction, mean power variation, and complexity will be given. Finally, we describe the implementation of a PAPR reduction algorithm in the DVB-T2 modulator.
Highlights
The performance of high data rate systems is significantly limited by the multipath interference that occurs in the radio channel environment
We evaluate the performance of different Tone Reservation-based techniques for Peak to Average Power Ratio (PAPR) reduction in Digital Video Broadcasting (DVB)-T2 context
It should be noted that the power of the correction carriers should not exceed the power spectrum mask specified for DVB-T2 by more than 10 dB
Summary
The performance of high data rate systems is significantly limited by the multipath interference that occurs in the radio channel environment. OFDM signals are characterized by very high Peak-to-Average Power Ratio (PAPR) levels. The simplest solution to this problem is to operate the HPA in the linear region by allowing a large enough amplifier back-off This approach degrades the power efficiency of the system and often leads to unacceptable cost-efficiency conditions in the overall system. The performance of this method depends on the mapping level It is not relevant for DVB-T2 system with QAM modulation up to 256 states and in the case of rotated constellation. Proposals for PAPR reduction in the case of DVB-T2 system will be restrained to methods issued from the TR concept.
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