OFDM PAPR reduction by switching null subcarriers and data-subcarriers
نویسندگان
چکیده
This proposed method reduces the peak-to-average power ratio (PAPR) of multi-carrier transmission, by exploiting null subcarriers, already mandated in most OFDM wireless standards. This new approach requires no channel side information, can be compatible with existing standards, imposes no rate hit, is distortionless, has low computational complexity, and can complement most other PAPR-reduction methods (such as active constellation extension, partial transmit sequences, selective mapping, tone injection, tone reservation).
منابع مشابه
Grouped-Subcarrier Based Null-Data Switching for PAPR Reduction of OFDM with Low Computational Complexity
Being a multicarrier modulation scheme, Orthogonal Frequency Division Multiplexing (OFDM) systems generally produce transmit signals with high Peak to Average Power Ratio or PAPR. Amongst numerous PAPR reduction strategies found in the literature, a relatively new but promising technique is the null and data subcarrier switching method. In this paper, we propose a new approach of null-data subc...
متن کاملJoint Optimal Resource Allocation and PAPR Reduction Algorithm for OFDMA Systems
One of the drawbacks of an orthogonal frequency division multiplexing (OFDM) system is the larger peak to averaged power ratio (PAPR). The PAPR reduction scheme is a complicated problem, especially when a resource allocation is considered jointly. In this paper, a joint algorithm for determining an optimal resource allocation with PAPR awareness is proposed. Firstly, an adaptive tone reservatio...
متن کاملPAPR Reduction Scheme with SOCP for MIMO-OFDM Systems
Combination of multiple-input multiple-output (MIMO) with orthogonal frequency division multiplexing (OFDM) has become a promising candidate for high performance wireless communications. However one major disadvantage of MIMO-OFDM systems lies in a prohibitively large peak-to-average power ratio (PAPR) of the transmitted signal on each antenna. In this paper we extend from SISO to MIMO systems ...
متن کاملAn Improved SLM Technique For PAPR Reduction In OFDM Systems
Orthogonal Frequency Division Multiplexing (OFDM) is widely used as a standard modulation for various high data rate wireless communication systems. It is worked by converting high data rate streams into a number of parallel low data rate streams. OFDM has many advantages over single carrier modulation systems. Some of these advantages are robustness to frequency fading channels, high transmiss...
متن کاملA Comparison of Different Papr Reduction Techniques in Ofdm Using Various Modulations
Orthogonal Frequency Division Multiplexing (OFDM) is one of the Strong candidate for Transmission of high data rate due to Multicarrier Modulation. One of the challenging Issue of OFDM is its high Peak to Average Power Ratio (PAPR or PAR). This Paper discusses different PAPR Reduction techniques in OFDM. The Classical Clipping, Selective Mapping, Tone reservation and Partial Transmit sequence T...
متن کامل