This paper presents the extension of vector precoding, a generalization of the nonlinear TomlinsonHarashima precoding, with a PAPR (peak-to-average power ratio) reduction technique for the downlink of OFDM systems. The proposed algorithm exploits alternative transmit sequences arising from vector precoding to reduce the peak power in the time-domain baseband transmit signal. The operation is co...

orthogonal frequency division multiplexing (ofdm) has become a promising method for many wireless communication applications. however, one main drawback of ofdm systems is the high peak-to-average power ratio (papr). selected mapping (slm) is a well-known technique to decrease the problem of high papr in ofdm systems. in this method, transmitter is obliged to send some bits named side informati...

In this submission, we report a maximum 638-W fiberized chirped-pulse-amplification (CPA) laser system with bulk reflection grating compressor. The is able to emit 338-W compressed pulses of 624 fs centered at 1 µm, corresponding pulse energy 1.3 µJ repetition rate 258 MHz. output beam quality factor M <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink...

Multi and single carrier waveforms are utilized in cellular systems for high-speed data transmission. In The Fifth Generation (5G) system, several waveform techniques based on multi proposed. However, the Peak to Average Power Ratio (PAPR) is seen as one of significant concerns advanced it degrades efficiency framework. proposed article documents study, progress, implementation PAPR reduction a...