OFDM with Double Quadrature Signed Index Shift Keying
نویسندگان
چکیده
Spectral, and energy-efficient, communication is essential for the current future wireless generations. Therefore a novel OFDM with double quadrature signed index shift keying (OFDM-DQSISK) proposed. Double levels of (ISK) system proposed to enhance spectral efficiency modulation (OFDM-IM) system. In DQSISK level one, variable α its jα are exploited differentiate between indices active in-phase quadrature-phase subcarriers, respectively. While versions, i.e., -α -jα, in two distinguish subcarrier indices. both levels, all possible combinations, including case inactive DQSISK. Hence, improved as it linearly increases grouping size. Also, value optimized over structure using Grey Wolf Optimizer (GWO) minimize scheme’s peak average power ratio (PAPR). Furthermore, replaced standard M-ary Plus amplitude (PAM) introduce higher SE version The simulation results illustrate superiority, attains low PAPR compared up-to-date OFDM-IM schemes.
منابع مشابه
Quadrature Phase Shift Keying and Offset Quadrature Phase Shift Keying BER Performance Comparison
Modulation plays an important role in transmission of signals from transmitter to receiver in all communication systems and the performance of digital modulation systems is of the most important key factors to achieve the best results of the communication process . This paper presents a comparative study of some performance parameters or performance metrics of a digital communication system wit...
متن کاملM-ary amplitude shift keying OFDM system
Coherent M-ary ASK is proposed to be used in OFDM systems. The frequency separation between subcarriers is only 1/2T instead of 1/T. With a slightly wider bandwidth, an M -ary ASK-OFDM can achieve the same BER of M-ary QAM-OFDM and a better BER than that of MPSK-OFDM. The M -ary ASK-OFDM has the same Peak-To-Average-Power Ratio (PAPR) as that of the M-ary QAM-OFDM. The MASKOFDM can be implement...
متن کاملCarrier Synchronization of Offset Quadrature Phase-Shift Keying
This article contains analyses of the performance of various carrier synchronization loops for offset quadrature phase-shift-keying (OQPSK) modulation, all motivated in one form or another by the maximum a posteriori (MAP) estimation of carrier phase. When they are implemented as either high or low signal-to-noise ratio (SNR) approximations to the generic implementation suggested by the MAP est...
متن کاملA Novel Sample Based Quadrature Phase Shift Keying Demodulator
This paper presents a new practical QPSK receiver that uses digitized samples of incoming QPSK analog signal to determine the phase of the QPSK symbol. The proposed technique is more robust to phase noise and consumes up to 89.6% less power for signal detection in demodulation operation. On the contrary, the conventional QPSK demodulation process where it uses coherent detection technique requi...
متن کاملAmplitude Shift Keying & Frequency Shift Keying
Aim: To generate and demodulate an amplitude shift keyed (ASK) signal and a binary FSK signal. Amplitude shift keying-ASK-in the context of digital communications is a modulation process, which imparts to a sinusoid two or more discrete amplitude levels. These are related to the number of levels adopted by the digital message. For a binary message sequence there are two levels, one of which is ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Access
سال: 2023
ISSN: ['2169-3536']
DOI: https://doi.org/10.1109/access.2023.3304991