Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems
Abstract
:1. Introduction
2. System Models
3. Proposed SLM PAPR Scheme
3.1. Derived General Form of SLM in the Time Domain
3.2. Proposed Low-Complexity Conversion Vectors
- (1)
- The support Lu of is chosen as a small integer to restrict the length of the equivalent channel;
- (2)
- There are few nonzero elements whose number is denoted as K in to reduce the complexity in generating the candidate signals with Equation (11);
- (3)
- The real and imaginary parts of each nonzero element in are chosen in the set to avoid the complex multiplications in generating the candidate signals (ignoring the constant factor to maintain the power constraint) [10].
3.3. Complexity Analysis
4. Simulation Results
5. Conclusions
Author Contributions
Acknowledgments
Conflicts of Interest
References
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Number of Nonzero Elements | Indices of Nonzero Elements | Values of Nonzero Elements |
---|---|---|
, , and | , and , | |
and | , |
PAPR Schemes | Number of CMs | Number of CAs |
---|---|---|
Conventional SLM method | (UGN/2)log2(GN) | UGNlog2(GN) |
SLM method in [10] | (GN/2)log2(GN) | GNlog2(GN) + (U − 1)(K − 1)GN |
Proposed method | (GN/2)log2(GN) | GNlog2(GN) + (U − 1)(K − 1)GN |
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Xia, Y.; Ji, J. Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems. Information 2018, 9, 220. https://doi.org/10.3390/info9090220
Xia Y, Ji J. Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems. Information. 2018; 9(9):220. https://doi.org/10.3390/info9090220
Chicago/Turabian StyleXia, Yujie, and Jinwei Ji. 2018. "Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems" Information 9, no. 9: 220. https://doi.org/10.3390/info9090220