Journal ArticleDOI
On the Use of Hexagonal Constellation for Peak-to-Average Power Ratio Reduction of an ODFM Signal
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TLDR
The proposed use of hexagonal constellation for PAPR reduction of an OFDM signal will be applied to eliminate data rate loss due to the side information in partial transmit sequence (PTS) technique and selected mapping (SLM) technique.Abstract:
One of the main drawbacks of orthogonal frequency division multiplexing (OFDM) is the high peak-to-average power ratio (PAPR) of the OFDM signal. In this paper, we propose the use of hexagonal constellation for PAPR reduction of an OFDM signal. Because hexagonal constellation is the densest packing of regularly spaced points in two dimensions, we can have more signal points in a given area with hexagonal constellation than with quadrature amplitude modulation (QAM) constellation. We can exploit these extra degrees of freedom provided by the hexagonal constellation for PAPR reduction of an OFDM signal. We will apply the proposed technique to eliminate data rate loss due to the side information in partial transmit sequence (PTS) technique and selected mapping (SLM) technique.read more
Citations
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Journal ArticleDOI
Peak-To-Average Power Ratio Reduction in OFDM Systems: A Survey And Taxonomy
Yasir Rahmatallah,Seshadri Mohan +1 more
TL;DR: The survey describes the most commonly encountered impediment of OFDM systems, the PAPR problem and consequent impact on power amplifiers leading to nonlinear distortion, and provides insights into the transmitted power constraint by showing the possibility of satisfying the constraint without added complexity by the use of companding transforms with suitably chosen companding parameters.
Journal ArticleDOI
Symbol Error Probability of Hexagonal QAM
TL;DR: Simulation results show that the proposed approximation for the SEP of hexagonal QAM in additive white Gaussian noise is very accurate for all the best-known QAM constellations constructed from the hexagonal lattice, including triangular QAM, for both high and low signal-to-noise ratio.
Journal ArticleDOI
Joint Channel Estimation and PTS to Reduce Peak-to-Average-Power Radio in OFDM Systems Without Side Information
TL;DR: Simulations show that the proposed scheme with the novel pilot arrangement could offer good performances of bit error rate and PAPR reduction.
Journal ArticleDOI
A Survey on Higher-Order QAM Constellations: Technical Challenges, Recent Advances, and Future Trends
TL;DR: In this article, power and bandwidth efficient modulation schemes for the next generation communication systems in details are surveyed and detailed study of star QAM, XQAM, and HQAM is presented.
Journal ArticleDOI
A multilevel coded modulation approach for hexagonal signal constellation
Makoto Tanahashi,Hideki Ochiai +1 more
TL;DR: It is shown that this system outperforms the standard square 16-QAM with the same rate when PAR is constrained, and focuses on an 18-ary HSM with the information rate of 3 bit/symbol as a specific example.
References
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Journal ArticleDOI
An overview of peak-to-average power ratio reduction techniques for multicarrier transmission
Seung Hee Han,Jae Hong Lee +1 more
TL;DR: Some of the important PAPR reduction techniques for multicarrier transmission including amplitude clipping and filtering, coding, partial transmit sequence, selected mapping, interleaving, tone reservation, tone injection, and active constellation extension are described.
Journal ArticleDOI
Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping
TL;DR: A method for the reduction of peak-to-average transmit power ratio of multicarrier modulation systems, called selected mapping, is presented, which is appropriate for a wide range of applications.
Journal ArticleDOI
OFDM with reduced peak-to-average power ratio by optimum combination of partial transmit sequences
Stefan Müller,Johannes B. Huber +1 more
TL;DR: In this paper, the authors proposed a very effective and flexible peak power reduction scheme for orthogonal frequency division multiplexing (OFDM) with almost vanishing redundancy, which works with arbitrary numbers of subcarriers and unconstrained signal sets.
Book
OFDM for Wireless Communications Systems
TL;DR: A Practical OFDM System: Fixed Broadband Wireless Access (FBWA) and an Overview of Frequency Selective Radio Channel.
Journal ArticleDOI
Computation of the continuous-time PAR of an OFDM signal with BPSK subcarriers
TL;DR: It is shown that the instantaneous envelope power function can be transformed into a linear sum of Chebyshev polynomials and the roots of the derivative of EPF can be obtained by solving a polynomial.
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