[PDF] Top 20 Improving the Performance of OFDM and Reduce PAPR Using Trigonometric Transform

... the transform (Li) is concatenated with the first half of samples of the in-quadrature component after the transform (Lq) to form the new in- phase ...the transform (Hi) is concatenated with the ... See full document

... to reduce the signal to quantization noise ratio, which in general increased asthe amplitude of the signal ...beenproposed using the hyperbolic tangent function ...can reduce the magnitude of the ... See full document

... an OFDM signal has a large Peak-to- Average Power Ratio (PAPR), which can result in significant distortion when passed through a nonlinear device, such as a transmitter power ...the PAPR in ... See full document

... of OFDM is the high Peak-to-Average Power (PAPR) which results in the Bit Error Rate (BER) performance ...the PAPR problem. In this paper, PAPR reduction in OFDM systems is based ... See full document

... for PAPR reduction of OFDM signals have been ...DCT transform. The scheme 1 is composed of DCT matrix transform followed by conven- tional SLM, while DCT transform is used before con- ... See full document

... frequency-domain OFDM symbols and T is the symbol duration. To reduce the PAPR we proposed algorithm is Non-Linear Companding transform (NCT) technique is used ...to transform the given ... See full document

... SLM- OFDM approach is investigated in terms of PAPR reduction, Power Spectral Density (PSD) and Bit-Error Rate (BER) ...general OFDM as well as improving the BER performance over SLM ... See full document

... Today OFDM used in many wireless standards such as terrestrial digital video broadcasting (DVB-T), digital audio broadcasting (DAB-T), and adopted in wireless local area networks (WLANs) (IEEE ...of OFDM is ... See full document

... to reduce the effects of transients, Recent applications of commanding have been developing in the fields of analog and digital signal ...proposed using commanding in analog signal processors ... See full document

... The OFDM technique has several advantages such as elimination of inter symbol interference (ISI) and inter carrier interference (ICI), efficient use of spectrum, dividing wide band channel in to narrow band ... See full document

... such transform should be designed judiciously such that the clipped signal is as little as possible For this reason, how to reallocate the statistics of OFDM signal as well as the power more reasonably to ... See full document

... In OFDM, the subcarriers are added constructively to form large ...on PAPR reduction such as Clipping, Coding, Selective Mapping (SLM), Interleaving, Nonlinear Companding Transform, Hadamard ... See full document

... effectively reduce the peak-to- average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) technology and is implemented to solve the PAPR problem in orthogonal frequency ... See full document

... error performance results. Orthogonal frequency division multiplexing (OFDM) technique is a promising technique in this regard as it offers high data rate and reliable communications over various fading ... See full document

... combines OFDM and phase modulation to achieve: (i) constant envelope signal which allows HPA to operate near saturation level and thus maximizing power efficiency, and (ii) robust performance over multipath ... See full document

... (PA) PAPR reduction technique in O-OFDM using multiple ...required PAPR reduction. By using the PA approaches, additionally PAPR reduction may be attained with the amalgamation ... See full document

... original OFDM system. The idea to use the hadamard transform is to reduce the autocorrelation of the input sequence to reduce the peak to average power problem and it requires no side ... See full document

... the PAPR of the oversampled discrete-time signal offers an accurate approximation of the PAPR of the continuous-time OFDM signal if the oversampling factor is at least ...The performance of a ... See full document

... ________________________________________________________________________________________________________ Abstract— There is the demand of speed over 100Mbps downlink and 50Mbps uplink to mobile users, data beyond ... See full document

... Of the handful of methods to reduce PAPR, tone reser- vation is particularly robust and canonical. This is because the only information that the receiver requires is the location of the information set. The ... See full document