Peak to average power ratio (PAPR) reduction in OFDM systems

Latif, Asma

doi:10.1109/inmic.2002.1310167

Cited by 7 publications

(4 citation statements)

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“…From Fig (7) and Fig (8), it is shown that the proposed SLM with Clipping And Filtering scheme achieves more PAPR reduction than the conventional SLM or conventional clipping and filtering method. Moreover, this figure also shows that the PAPR of the proposed scheme is slightly lower PAPR than the previous proposed Clipping And Filtering with PTS scheme From the previous two figures, as the iterative clipping and filtering are increased the PAPR CCDF curve decrease and the PAPR CCDF curves are increased when N increase.…”

Section: Simulation Results Of Proposed Slm With Clipping and Filteri...mentioning

confidence: 97%

“…A method named simplified clipping and filtering SCAFBD gives almost the same PAPR reduction as repeated clipping and filtering, but the complexity is significantly reduced. Only 3 FFT's are required for the PAPR reduction equivalent to iterative method using arbitrary K. Finally, we have implemented into this method the block to bound distortion (BD) to ensure higher noise immunity of transmitted signal [3,4,5,6,7]. A block scheme of the SCAFBD method is shown in Fig( 1).…”

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confidence: 99%

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Proposed Combined PTS with Clipping and Filtering Technique for PAPR Reduction in OFDM System

Kareem¹

2012

ETJ

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One of the major drawbacks of OFDM is high Peak-to-Average Power Ratio (PAPR) which can result in poor power efficiency and serious distortion in the transmitter amplifier. In this paper, the advantages of two different approaches to PAPR reduction are exploited in order to reduce the PAPR more significantly. The first approach is based on clipping and filtering which provides a high PAPR reduction at the cost of signal distortion. The second approach (Partial Transmit Sequence PTS or Selected Mapping SLM methods) results in no distortion. The performance of the three proposed combined methods(Clipping And Filtering with PTS scheme, SLM with Clipping And Filtering scheme, and PTS with Clipping And Filtering scheme)are evaluated on the PAPR distribution function and on the Bit Error Rate as a function of Signal to Noise Ratio in Additive White Gaussian Noise Channel. The simulation results show that the proposed PTS with Clipping And Filtering scheme provides more PAPR reduction without degradation in the BER performance as compared to the other two proposed scheme (Clipping And Filtering with PTS scheme and SLM with Clipping And Filtering scheme). The simulation results of PAPR reduction and BER performances are simulated using MATLAB R2009a computer simulation software.

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Section: Simulation Results Of Proposed Slm With Clipping and Filteri...mentioning

confidence: 97%

mentioning

confidence: 99%

Proposed Combined PTS with Clipping and Filtering Technique for PAPR Reduction in OFDM System

Kareem¹

2012

ETJ

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“…The simulation results show that BER performance is improved while PAPR is considerably reduced at the cost of decreased bandwidth efficiency and little detection complexity [11] . Like PTS [12,13] , it works with arbitrary number of subcarriers but needs no side information to be transmitted.…”

Section: Introductionmentioning

confidence: 99%

“…BER of 16QAM/16FSK, N =64 OFDM in rayleigh slow fading channel with normalized Doppler shift, f d T = 0.0064.The coding applied is RS(13,7).…”

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confidence: 99%

Error rate performance of Hybrid QAM-FSK in OFDM systems exhibiting low PAPR

Latif

Gohar

2009

Sci. China Ser. F-Inf. Sci.

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Multicarrier transmission systems like orthogonal frequency division multiplexing (OFDM) support high data rate and generally require no equalization at the receiver, making them simple and efficient. This paper studies the design and performance analysis of a hybrid modulation system derived from multifrequency and MQAM signals, employed in OFDM. This modulation scheme has better bit error rate (BER) performance and exhibits low PAPR. The proposed hybrid modulator reduces PAPR while keeping the OFDM transceiver design simple, as it does not require any side information or a little side information (only one bit) to be sent and is efficient for arbitrary number of subcarriers. The results of the implementations are compared with those of conventional OFDM system. orthogonal frequency division multiplexing (OFDM), hybrid MQAM/LFSK modulator (HQFM), bit error rate (BER), peak to average power ratio (PAPR)

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