OFDM PAPR Reduction Using Selected Mapping Without Side Information

Khoo, Boon Kien; Goff, S.Y. Le; Tsimenidis, Charalampos C.; Sharif, B.S.

doi:10.1109/icc.2007.716

Cited by 14 publications

(10 citation statements)

References 11 publications

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“…Based on the principles of SLM algorithm, it is apparent that the ability of PAPR reduction using SLM is affected by the route number M and subcarrier number N. Therefore, simulation with different values of M and N will be conducted, and the results exhibits some desired properties of signals representing the same information [6][7][8][9]. …”

Section: Selective Mapping Technique Simulation Resultsmentioning

confidence: 99%

“…Another difficulty for PTS is the side information that can distinguish different mappings must be transmitted, which can take up to D bits. There have been several proposed PTS side information schemes [15]. But there is still a sub-optimal Element to PTS where more mappings than necessary are being tried per PAPR reduction, which leads to more side information than necessary being transmitted per PAPR reduction.…”

Section: Various Papr Reduction Techniques 41 Partial Transmit Sequencementioning

confidence: 99%

“…Even if the phase values are discredited to 0 and 180, phase combinations to be searched to find the optimum. Moreover, [15] shows that taking the peak amplitude of the N-point IFFT output will not give the true peak, and hence over sampling is necessary. Our key modification is as following.…”

Section: Various Papr Reduction Techniques 41 Partial Transmit Sequencementioning

confidence: 99%

“…Let {Zn} be the magnitudes of complex samples. Assuming that the average power of complex pass band OFDM signal is equal to one, the { } are the normalized Rayleigh random variables with its own average power, which has the probability density function [4][5][6][7][8] as shown below: (8) Where | | , Note that the maximum of is equivalent to the crest factor (CF) defined in Equation (8). Let denote the crest factor.…”

Section: |mentioning

confidence: 99%

“…The sub block partitioning strategy, such as partial transmits sequence (PTS) [14][15][16][17][18], divides frequency domain signals into several sub blocks. On the other hand, the entire block strategy, such as selected mapping (SLM), [8][9][10] consider the entire block for generating multiple candidates.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Performance Improvement of MIMO-OFDM Wireless Systems using PAPR Reduction Techniques

MabroukAbdelhamid¹,

Abdel-Rahman²,

Farrag³

2012

IJCA

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High Peak to Average Power Ratio (PAPR) for MIMO-OFDM system is still a demanding area and difficult issue. The radio transmitter stations for covering and getting enough transmitted power in their desired area has to use High Power Amplifier (HPA). On the other hand, in order the HPA to have the most output power efficiency must be designed to work close to the saturation region, therefore due to the high PAPR of input signals, a factor which is called memory-less nonlinear distortion will affect the communication channels. We know the MIMO-OFDM receiver's efficiency is sensitive to the HPA. If the high power amplifier doesn't work in linear region, it can cause the out-of-band power to be kept under the specified limits. This condition can cause inefficient amplification and expensive transmitters, thus it is necessary to investigate PAPR reduction techniques for MIMO-OFDM system. By now, for reducing PAPR, numerous techniques have been recommended. In this paper the performance and the efficiency of two types of them will be discussed and simulated and then we will propose our suggested method for a conventional OFDM system.

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Section: Selective Mapping Technique Simulation Resultsmentioning

confidence: 99%

Section: Various Papr Reduction Techniques 41 Partial Transmit Sequencementioning

confidence: 99%

Section: Various Papr Reduction Techniques 41 Partial Transmit Sequencementioning

confidence: 99%