Pulse shaping methods for inter carrier interference reduction in OFDM system

Wirastuti, Ni Made Ary Esta Dewi; Anggitiadewi, Ni Putu Lintang; Pramaita, Nyoman

doi:10.12928/telkomnika.v18i5.13840

Cited by 8 publications

(11 citation statements)

References 19 publications

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“…Research on interference can be done by looking at the performance of the device through the BER meter, eye pattern, and constellation diagram. Wirastuti et al [4], reduction of inter-carrier interference (ICI) is done by simulating the circuit formed by the orthogonal frequency-division multiplexing (OFDM) pulse shaping system. The result of the simulation in terms of BER vs. Eb/No suggested that rectangular (REC) improved sinc-power (ISP) pulse shaping and ISP pulse shaping are more efficient in minimizing intercarrier interference (ICI) no-implemented pulse forming relative to the OFDM system.…”

Section:  Issn: 1693-6930mentioning

confidence: 99%

“…It is possible that there is interference from one device to another. For example, wireless fidelity (Wi-Fi) and bluetooth systems can be interferer with a wireless sensor network system, and vice versa [2]- [4]. The problem is how to maintain the presentation of the DQPSK system that gets interference attacks by constructing a better system configuration.…”

Section: Introductionmentioning

confidence: 99%

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Robust interference cancellation for differential quadrature phase-shift keying modulation with band limiting and adaptive filter

et al. 2021

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Differential quadrature phase-shift keying (DQPSK) modulation techniques and their variants are widely applied in digital communication, such as for high-speed optical fiber, bluetooth, or satellite communication. In its implementation, DQPSK cannot be separated from the potential harmful interference. In this research, a system model has been made for observation and analysis of the interference cancellation process. Discrete finite-duration impulse response (FIR) filters for band limiting and adaptive filter are the key components of the supporting block for this system model. Robust Simulink results have shown a significant increase in system performance in the existence of these key components. The indication has been shown by the best bit error rate (BER) of 3.3e-05. Constellation and eye pattern diagrams have supported the BER.

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Section:  Issn: 1693-6930mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Robust interference cancellation for differential quadrature phase-shift keying modulation with band limiting and adaptive filter

et al. 2021

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“…So, in general, OFDM performance is better because pulse formation can reduce the power of the side lobes of subcarriers and potentially cause ICI. Therefore, by using pulse formation, the side lobe subcarrier will not interfere with other subcarriers [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Remote Pressure Water Valve Control System Based on PLC

Widhiada¹,

Widiyarta²,

Antara³

et al. 2021

Int. J. Adv. Sci. Eng. Inf. Technol.

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Currently, valve operations use manual processes to safeguard water pressure and distribution to the Regional Water Company. Conventional systems are still used upon operations in opening and closing the valve. This method requires operators to rotate the valve by hand to maintain the distribution and water pressure's stability to the Regional Water Company. It would be more efficient if operators can maintain the distribution and water pressure stability without going to the location where the valve is located. A PLC and Android-based distribution valve remote control system design is planned to be produced from this research. Control commands are done via HMI display on Android to the PLC via PC and server to control the gearbox motor located on the valve. The pressure analysis shows that there are differences before the control system is installed. The pressure tends to be under 4 bar and is less stable. However, after the control system is installed, it tends to be more stable, between 4 bar and 4.5 bar. The data flow results show a difference in the flow before the control system is installed. The distributed flow tends to be below the number 180 l / s and is less stable. After installing the control system, the flow is more stable and increased from originally at an average of 144.4 l/s to 171.2 l/s, a difference of 26.8 l/s.

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“…This technology is remarkably interesting because it can still maintain its performance in poor channel conditions [2], [3]. So, OFDM has been widely used commercially and is still in research development, namely: Digital Video Broadcasting-Terrestrial (DVB-T) [4], Wireless Local Area Network (WLAN) [5], Broadband Wireless Access (BWA) especially IEEE 802.16d WiMAX [6], [7], IEEE 802.20 mobile Broadband Wireless Access (BWA) and Mobile Multimedia Access Communication (MMAC) [8]- [10] as well as 4 th Generation (4G) cellular standards such as Long Term Evolution (LTE) [11]- [14].…”

Section: Introductionmentioning

confidence: 99%

G-OFDM Variants Evaluation for Transmitter and Receiver Implementation

Wirastuti¹,

Noras²

2021

International Journal on Advanced Science, Engineering and Information Technology

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Orthogonal Frequency Division Multiplexing (OFDM) is chosen as a multiplexing technique and broadly used in today's radiocommunication environments to overcome spectrum insufficiency. In current OFDM applications, the IDFT/DFT algorithms are used for modulation and demodulation, efficiently implemented using the IFFT/FTT. The IFFT and FFT are some of the main components of OFDM systems, requiring intensive computation, especially for a high number of sub-channels. Reducing the computational burden of the IFFT/FFT would offer an advantage in reducing the total OFDM system complexity. In this proposed system, the idea of implementing the very fast Fourier transform (VFFT) in OFDM (later, it is called G-OFDM) is based on a trade-off between performance and complexity. The implementation complexity of G-OFDM is lower than OFDM. However, there is a performance cost. G-OFDM has been studied both analytically and in simulation over the AWGN channel. In particular, performance is marred by the non-uniformity of SNR among sub-carriers. In this study, it was proposed two G-OFDM variants called G1-OFDM and G2-OFDM. G1-OFM is the least complex among all G-OFDM scenarios but gives the worst performance, while G2-OFDM gives the best performance but is the most complex. The results show that the performance of G-OFDM and its variants can be improved through the application of different values of n-quantization levels. In other words, using n-quantization levels, we can decrease the processing loss of the G system.

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Pulse shaping methods for inter carrier interference reduction in OFDM system

Cited by 8 publications

References 19 publications

Robust interference cancellation for differential quadrature phase-shift keying modulation with band limiting and adaptive filter

Robust interference cancellation for differential quadrature phase-shift keying modulation with band limiting and adaptive filter

Remote Pressure Water Valve Control System Based on PLC

G-OFDM Variants Evaluation for Transmitter and Receiver Implementation

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