PAPR Reduction of OFDM Signals Using Genetic Algorithm PTS Technique

Kim, Sung‐Soo; Myoung-Je, Kim; Gulliver, T. Aaron

doi:10.1093/ietcom/e91-b.4.1194

Cited by 22 publications

(41 citation statements)

References 7 publications

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“…With a similar computational load, the PAPR statistic of the MRVGA_EI PTS with G = 20 is compared with that of other suboptimal PTS methods. Figure 4 shows the PAPR CCDFs of various suboptimal PTS schemes, including the proposed MRVGA -EI, the exhaustive search, the iterative flipping (IF) [4], the gradient descent (GD) [5], the simulated annealing (SA) [6], the BGA [7], and the artificial bee colony (ABC) [11], for N = 64 subcarriers, in which the GD is with parameters r = 3 and I = 2 and both the SA and the BGA are with the same parameters in [6] and [7], respectively. Furthermore, the number of enumerations is 4,000 in the SA while the population is 200 and the number of the generations is 20 in both of the BGA and the ABC to ensure having a similar computational load.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…To reduce the computational complexity for searching rotation phases in PTS, various suboptimal methods that achieve significant reduction in complexity were presented in [4][5][6][7][8][9][10][11]. Owing to an intensive improvement of circuit design for genetic algorithms (GAs) in recent years [12,13], PTS based on GAs not only has moderate PAPR reduction performance but also shows potential for practical implementation among these methods.…”

Section: Introductionmentioning

confidence: 99%

“…With the trend of GA hardware becoming more popular and low-priced, the PTS based on GA may provide a practical and economical approach toward solving the difficulty of high PAPR in OFDM systems. Previous studies have demonstrated that the BGA PTS achieves a moderate PAPR reduction in discrete domains [7][8][9]. However, rotation phases involved in this phase-searching problem are real-valued radians.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

PAPR reduction of OFDM signals using PTS: a real-valued genetic approach

Lain

Yang

2011

J Wireless Com Network

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The partial transmit sequences (PTS) scheme achieves an excellent peak-to-average power ratio (PAPR) reduction performance of orthogonal frequency division multiplexing (OFDM) signals at the cost of exhaustively searching all possible rotation phase combinations, resulting in high computational complexity. Several researchers have proposed using binary-coded genetic algorithms (BGA) PTS to reduce both the PAPR and computational load. To improve the PAPR statistics of OFDM signals further while still reducing the computational complexity, this paper proposes a new PTS using the real-valued genetic algorithm (RVGA). By defining a cost function based on the amount of PAPR, PTS can be formulated as an optimization problem over a multidimensional real space and solved by implementing the RVGA method. The simulation results show that the performance of the proposed RVGA PTS, along with an extinction and immigration strategy, provides approximately the same PAPR statistic as the exhaustive PTS scheme, while maintaining a low computational load.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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PAPR reduction of OFDM signals using PTS: a real-valued genetic approach

Lain

Yang

2011

J Wireless Com Network

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“…Then, all the IFFT output signals s (i) , 1 ≤ i ≤ K, can be expressed by (4) and (10), as shown in Figure 1.…”

Section: Conversion With T Kmentioning

confidence: 99%

“…Deterministic schemes, such as clipping [3], deliberately clip the peak amplitude of the OFDM signal to some desired maximum level. Probabilistic schemes, such as partial transmit sequences (PTS) [4,5] and SLM [6][7][8][9][10][11][12], statistically improve the characteristics of the PAPR distribution of the OFDM signals without signal distortion.…”

Section: Introductionmentioning

confidence: 99%

A Novel SLM Scheme for PAPR Reduction in OFDM Systems

Shi

Wang

2011

Journal of Computer Networks and Communications

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Orthogonal frequency-division multiplexing (OFDM) is an attractive transmission technique for high-bit-rate communication systems. One major drawback of OFDM is the high peak-to-average power ratio (PAPR) of the transmitter's output signal. A novel selected mapping (SLM) scheme is proposed, which employs matrix transformation, cyclically shifting, and linear combining algorithm to generate new candidates. The novel scheme requires only one IFFT and gets more candidate transmission signals throughout the entire process. The complexity analysis and simulation results show that this algorithm can dramatically reduce computational complexity comparing with the conventional SLM scheme as in

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A partial transmit sequence technique with error correction capability and low computation

Liang

Chu

Lin

et al. 2013

Int J Communication

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SUMMARYOrthogonal frequency division multiplexing (OFDM) is a popular transmission technique in wireless communication. Although already widely addressed in many studies, OFDM still has flaws, one of which is the occurrence of high peak-to-average power ratio (PAPR) in the transmission signal. The partial transmit sequence (PTS) technique is one method adopted to reduce high PAPR in OFDM systems. However, as PTS utilizes phase factors to generate multiple candidate signals, large amounts of calculation and time are required to search the candidate signal with the minimal PAPR, which will then be adopted as the final transmission signal. This paper proposes a novel PAPR reduction method, which can be applied in OFDM systems with M-ary phase-shift keying modulation. It not only requires less computation but also possesses error correction capabilities. More precisely, the proposed method is to divide a block-coded modulation code into the direct sum of a correcting subcode for encoding information bits and a scrambling subcode for generating phase factors. Our proposed method is a suboptimal technique with low computation, because it uses a genetic algorithm with a partheno-crossover operator as the transmitted signal selection mechanism. Simulation results show our proposed method has better PAPR performance than the GA-PTS scheme. Based on the simulation results in Figures 5 and 6, it is evident that our proposed method can be employed in any OFDM system by using M-PSK modulation.

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PAPR Reduction of OFDM Signals Using Genetic Algorithm PTS Technique

Cited by 22 publications

References 7 publications

PAPR reduction of OFDM signals using PTS: a real-valued genetic approach

PAPR reduction of OFDM signals using PTS: a real-valued genetic approach

A Novel SLM Scheme for PAPR Reduction in OFDM Systems

A partial transmit sequence technique with error correction capability and low computation

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