Results 21 to 30 of about 49,895 (236)
A Survey on Physical Layer Performance of MIMO-WiMAX [PDF]
E3S Web of ConferencesThe IEEE 802.16 WiMAX standard for BWA (Broadband Wireless Access) was designed to offer end users high transmission data rates across wider regions.Wireless communication requires MIMO systems because they enable data to be sent and received through ...
Naveena A., Divya Udataneni
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Performance Evaluation of Dual Tree Complex Wavelet Packet Modulation (Dt-Cwpm) System Over Multipath Rayleigh Fading Channel [PDF]
Engineering and Technology Journal, 2013 The effectiveness of Dual Tree Complex Wavelet Packet Modulation (DT-CWPM) with DQPSK modulation is investigated for communication over flat and frequency selective Rayleigh fading channel. The simulation results show that the performance of the proposed
Hikmat N. Abdullah +2 more
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A Proposed Channel Estimation Based on Enhanced Sub-carrier Index Modulation and Packet-Discrete Wavelet Transform to Minimize Bit Error Rate [PDF]
Engineering and Technology Journal, 2021 For Orthogonal Frequency Division Multiplexing (OFDM) and other communication systems, many estimating approaches have been developed to estimate the channel state information and lower the Bit Error Rate (BER).
Ansam Jabbar
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A new technique for OFDM: OFDM-index modulation
2013 21st Signal Processing and Communications Applications Conference (SIU), 2013 In this study, a novel scheme called orthogonal frequency division multiplexing with index modulation (OFDM-IM) is proposed for frequency selective channels. In this scheme, the information is conveyed not only by only M-ary signal constellations as in classical OFDM, but also by the indices of the active subcarriers, which are determined according to ...
Basar, Ertuğrul +3 more
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JISA (Jurnal Informatika dan Sains), 2020 In order to enhance the user experience of virtual reality (VR) devices, VR multi-user environments and wireless connections must support as the latest generation of VRdevices.
harry dhika, dicky kurnia putra
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Comparison of FFT-Based and DCT-Based Channel Estimation and ECC for OFDM System [PDF]
Engineering and Technology Journal, 2015 Orthogonal Frequency Division Multiplexing (OFDM) has become a popular modulation method for high data rate wireless communications. In this paper, two schemes are proposed.
Awatif Ali Jafaar
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Use of Chaotic Oscillations for Precoding and Synchronization in OFDM
Advances in Electrical and Electronic Engineering, 2022 This paper proposes a novel linear precoding method for Orthogonal Frequency Division Multiplexing (OFDM) based on the employment of the chaotic waveforms generated by the fourth-order chaotic oscillator and orthonormalized by the Gram-Schmidt process ...
Arturs Aboltins +3 more
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Homodyne OFDM using simple optical carrier recovery [PDF]
, 2014 We demonstrate a novel optical injection locking approach to carrier recovery in RF-pilot aided OFDM. Any need for optical pre-filtering is eliminated and only very narrow guard bands are required.
Wu, D.S. +7 more
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Generalized Regression Neural Network Based Channel Identification and Compensation Using Scattered Pilot [PDF]
Radioengineering, 2021 In the high-speed mobile environment, channel state information (CSI) estimated at the beginning of the packet is quite different at the last part because the actual channel state changes with time.
H. He +4 more
doaj
Wavelet-OFDM vs. OFDM: Performance comparison
2016 23rd International Conference on Telecommunications (ICT), 2016 Wavelet-OFDM based on the discrete wavelet transform, has received a considerable attention in the scientific community, because of certain promising characteristics. In this paper, we compare the performance of Wavelet-OFDM based on Meyer wavelet, and OFDM in terms of peak-to-average power ratio (PAPR), bit error rate (BER) for different channels and ...
Marwa Chafii +2 more
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