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7 articles for “Orthogonal sequences”
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Design of Phase Coded Sequences for MIMO Radar Systems
Abstract: MIMO radar technology is emerging trend in the radar systems and researchers are interested to explore this technology. Phased array radars show single waveform radiated in one direction where has MIMO antennas can radiate in different directions and locate multiple targets with better resolution. To design waveform for MIMO radar, every transmitted waveform must orthogonal all corresponding waveform. Many binary orthogonal sequences, i.e., orthogonal with respect to frequency or phase …
Published in Current Trends in Signal Processing · Vol. 12, Issue 3, 2022 · pp. 28–35 Read article
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Orthogonal Thirty-Two Phase Sequence Sets Design
Abstract: In using orthogonal signals, a multi-input, multi-output (MIMO) radar system and a spread spectrum communication system can improve operating efficiency. The usage of polyphase coded signals as pulse compression sequences sets is a superior alternative. The Modified Genetic Algorithm (MGA) is utilized as a global optimization strategy to create thirty-two phase sequence sets in this work. Design orthogonal thirty-two phase sequence sets with an impulse-like Autocorrelation Function (ACF) and a …
Published in Current Trends in Signal Processing · Vol. 12, Issue 2, 2022 · pp. 33–39 Read article
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Investigations on PAPR Reduction using PTS Technique for OFDM Communication Systems
Abstract: AbstractOrthogonal Frequency Division Multiplexing (OFDM) is a spectral efficient technique for high data rate communication systems. It also provides robustness to multipath frequency selective fading but suffers from high peak-to-average power ratio (PAPR) and causes high power amplifiers to operate in the nonlinear region. In this paper partial transmit sequence (PTS) as PAPR reduction technique has been investigated. Mathematical modelling and Matlab simulation have been carried out to analyse its …
Published in Journal of Communication Engineering & Systems · Vol. 5, Issue 3, 2015 · pp. 19–26 Read article
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Numerical Modelling and Simulation of Improved Partial Transmit Sequence for PAPR Reduction in OFDM Communication System
Abstract: Channel capacity and peak average to power ratio are essential elements in offering dependable communication through wireless medium in this competing wireless communication system. The rating of an amplifier in an OFDM system, as well as prospective future candidates of 5G systems such as FBMC and UFMC, is affected by a high peak to average power ratio. The demand for channel capacity fluctuates due to the growing number of wireless …
Published in Recent Trends in Electronics Communication Systems · Vol. 8, Issue 3, 2021 · pp. 33–39 Read article
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A Review on Parametric Optimization of WEDM Technique for OHNS Steel
Abstract: In this study, the Wire Electrical Discharge Machining (WEDM) process for OHNS (Oil Hardened Non-Shrinking) steel, a high-performance material frequently used in the production of dies, punches, and precision tooling components, is optimized parametrically and validated experimentally. A continuously moving wire electrode and a sequence of electrical discharges are used in WEDM, a non-traditional machining method, to erode material and produce intricate and precise profiles, particularly in materials that are …
Published in Trends in Mechanical Engineering & Technology · Vol. 15, Issue 2, 2025 · pp. 29–35 Read article
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Mitigation of Peak to Average Power Ratio in Orthogonal Frequency Division Multiplexing through SOP-PTS
Abstract: Orthogonal Frequency Division Multiplexing (OFDM) is a popular multicarrier modulation technology extensively employed in 4G wireless communication systems to transmit data over a dispersive channel. To address the Peak-to-Average Power Ratio (PAPR) issue in OFDM, a technique called Partial Transmit Sequence (PTS) is commonly utilized. The PTS method involves dividing the data block into non-overlapping sub-blocks and then combining them using phase factors to mitigate PAPR. However, the conventional PTS …
Published in International Journal of Radio Frequency Innovations · Vol. 1, Issue 1, 2023 · pp. 32–39 Read article
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Block SLM Scheme for Efficient PAPR Reduction in OFDM Systems
Abstract: AbstractOrthogonal frequency division multiplexing (OFDM) is an attractive technique due to its high-speed data transmission and robustness for time-selective channels. However, the major drawback of OFDM system is high peak-to-average power ratio (PAPR). In this paper, two PAPR reduction schemes have been introduced; one is conventional selected mapping (SLM) scheme and a new proposed block selected mapping (BSLM) scheme to obtain PAPR reduction performance in OFDM system. In the proposed …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 3, 2013 · pp. 10–16 Read article