International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
www.irjet.net
ANALYSIS AND REDUCTION OF TIMING JITTER USING HYBRID OFDM DFMA PONS Jemimah Sharon1, Muthumani2 1Post Graduate Student, Government College of Engineering, Tirunelveli 2Professor, Dept. of Electronic and Communication Engineering, Government College of Engineering, Tirunelveli
----------------------------------------------------------------------***---------------------------------------------------------------------capacity as well as modulation scheme. The current Abstract -The popular instrumentation technique known
research work focuses on reducing information loss, lowering the Peak to Average Power Ratio (PAPR) in both carriage and detailed reporting, keeping the Bit Error Rate (BER) within the threshold, and analysing the Signal to Noise Ratio (SNR) in Multiple Input Multiple Output OFDM signals [1].
as ORTHOGONAL frequency-division multiplexing (OFDM) has been widely used in wireless broadband systems to prevent frequency-selective fading in wireless channels. Hybrid OFDM-DFMA PONs (orthogonal frequency division multiplexing—digital filter multiple access passive optical networks) hold out hope for seamless and low-cost optical and mobile network convergence in 5G and beyond. This PON has a higher signal transmission capacity and spectral efficiency than hybrid OFDM-DFMA PONs. This project presents using hybrid OFDM-DFMA PONS to analyse and reduce timing jitter. The vibration process employs a Quadrature Amplitude Modulation (QAM) modulator. The Inverse Fast Fourier Transform (IFFT) technique is used in this project. The Inverse Fast Fourier Transform is used to convert a signal from the spectral domain to the time domain (IFFT). To obtain the channel signal, identical code cyclic shifted prefix (ICCSP) signals are used in the parallel to serial conversion procedure. Since this project demonstrated its effectiveness and reduced noise errors, it is being used for further advancement. MATLAB software is used to carry out this project.
The multi-carrier modulation (MCM) technique orthogonal frequency division multiplexing (OFDM) has been shown to be very effective for communication over channels with frequency selective fading. It is extremely difficult to handle frequency selective fading in conventional communication receivers because the receiver design becomes extremely complex. Precisely where you are now. Instead of addressing the issue of resonance stringent fading as a whole, OFDM addresses it by converting the entire frequency selective fading channel into a number of narrow spectral flat modulation scheme. By using simple equalisation schemes, flat fading makes it easier for the beneficiary to combat connection tracking and Inter Symbol Interference (ISI). The majority of proprietary communication and broadcasting technology, including IEEE 802.11 wireless local Area Networks (WLANs), Zig Bee, Ultra Wide Band (UWB), and others, is based on spread spectrum regulation. These WLANs offer data rates ranging from 1 to 11 Mbps via frequency hopping and direct sequence. Despite these relatively high data rates, there is an increasing demand for higher data rates for wireless broadband Local Area Networks (LANs) and Metropolitan Area Networks (MANs) (MANs) [2]. Spread spectrum systems were unable to meet the even higher data rates required by multimedia applications due to inefficient bandwidth utilization. Furthermore, multimedia applications that operate outdoors or in industrial environments necessitate a wireless network that can operate more effectively in "RF hostile" surroundings.
Key Words: IFFT- Inverse Fast Fourier Transform, ICCSP- identical code cyclic shifted prefix.
1. INTRODUCTION Orthogonal Frequency Division Multiplexing (OFDM) is widely used in digital wireless telephone networks due to important characteristics like excellent data rate signal transmission with high bandwidth capability and its stability with respect to the multi path delay that occurs in digital networks. In both wired and wireless communication systems, an imaginative strategy is heavily used. The most difficult tasks in Wireless Communication Systems (WCS) are maintaining a larger number of Sub Carriers (SCs) and providing satisfied Quality of Service (QoS) requirements in relation to Bit Error Rate (BER) in frequency spectrum. By merging the antenna arrays at the receiver and transmitter in time variant along with frequency selective channels, an Orthogonal Frequency Multiplexing Division (OFDM) scheme maximizes system
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High spectral efficiency and a sizable increase in demand for high data rate multimedia based services are the two main prerequisites for the continued technological advancement in wireless communications in the future. For the improvement of the data rate and
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