OFDM PAPR reduction for image transmission using improved tone reservation

Abstract

High peak to average power ration (PAPR) in orthogonal frequency division multiplexing (OFDM) is an important problem, which increase the cost and complexity of high power amplifiers. One of the techniques used to reduce the PAPR in OFDM system is the tone reservation method (TR). In our work we propose a modified tone reservation method to decrease the PAPR with low complexity compared with the conventional TR method by process the high and low amplitudes at the same time. An image of size 128×128 is used as a source of data that transmitted using OFDM system. The proposed method decrease the PAPR by 2dB compared with conventional method with keeping the performance unchanged. The performance of the proposed method is tested with several numbers of subcarriers; we found that the PAPR is reduced as the number of subcarriers decreased.

Robust Deep Learning Models for OFDM-Based Image Communication Systems in Intelligent Transportation Systems (ITS) for Smart Cities

“…where 𝐶 is the channel capacity in bits per second, 𝐵 is the bandwidth of the channel in Hertz, 𝑆 is the signal power, and 𝑁 is the noise power. Using Equation (18) to express Shannon bound as bandwidth efficiency, 𝜂 = 𝐶 𝐵 , it can be expressed as:…”

Performance Analysis of Massive MIMO-OFDM System Incorporated with Various Transforms for Image Communication in 5G Systems

“…For instance, the BER assessment of OFDM based image transmission system after using the companding technique for PAPR reduction has been elaborated in [39,40]. Similarly, [41] evaluated the effect tone reservation (TR) technique for PAPR reduction on the BER assessment of OFDMbased image transmission systems. The effect of reducing the PAPR by using discrete cosine transform (DCT) and DFT precoding techniques on the BER assessment of MC-CDMA-based image transmission system was studied in [42].…”

Optimization of system’s parameters for wavelength conversion of E-band signals

“…In previous generations like 4G, orthogonal frequency division multiplexing (OFDM) has been used to achieve higher data rates [8]. On the other hand, it is suffering from a high peak-to-average power ratio (PAPR), so the authors in [9] proposed a new method including modified tone reservation to mitigate PAPR value with low complexity of implementation compared with classical tone reservation (TR) method. Moreover, Abid et al [10] proposed another technique to reduce PAPR which uses discrete cosine transform (DCT), low-density parity-check code (LDPC), and μ-law companding.…”