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Toplam kayıt 45, listelenen: 11-20
Sparse coding for transform domain-based sparse OFDM channel estimation
(IEEE-Inst Electrical Electronics Engineering Inc, 2019)
In orthogonal frequency division multiplexing (OFDM) systems, frequency domain pilot-aided channel estimation is based on interpolating a down-sampled version of the channel frequency response. This is achieved by transforming ...
Waveform-domain NOMA: The future of multiple access
(Institute of Electrical and Electronics Engineers Inc., 2020)
This paper introduces a novel non-orthogonal multiple access (NOMA) concept named waveform-domain NOMA, which proposes the coexistence of different waveforms in the same resource element (RE). Regarding the demands of each ...
Application-based coexistence of different waveforms on non-orthogonal multiple access
(IEEE-Institute of Electrical and Electronics Engineers Inc., 2021)
In the study, the coexistence of different waveform structures on the same resource element is studied under the theory of non-orthogonal multiple access (NOMA). This study introduces a paradigm-shift on NOMA towards the ...
Floating OFDM-SNM for PAPR and OOBE reduction
(Institute of Electrical and Electronics Engineers Inc., 2021)
The novel orthogonal frequency division multiplexing with subcarrier number modulation (OFDM-SNM) transmission scheme offers high spectral and energy efficiency compared to the conventional OFDM; this is due to the extra ...
OFDM and alternative waveforms
(Institution of Engineering and Technology, 2020)
This chapter aims to provide an in-depth understanding of orthogonal frequency division multiplexing (OFDM) as well as its performance in the presence of a multipath channel and various impairments. Also, major alternative ...
Mixed numerology OFDM and interference issues
(Institution of Engineering and Technology, 2020)
The upcoming generations of wireless communications are characterized by a wide variety of applications. This necessitates a provision of flexible radio access technologies (RATs) capable of adapting to changing user (and ...
Estimation and exploitation of multidimensional sparsity for MIMO-OFDM channel estimation
(Institute of Electrical and Electronics Engineers Inc., 2022)
Obtaining accurate channel state estimates at reasonable training overheads remains a big challenge for the applicability of multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM). Recently, ...
Blind numerology identification for mixed numerologies
(IEEE - Institute of Electrical and Electronics Engineers, Inc, 2021)
5G New Radio (NR) introduces new flexibility that different numerologies can be selected to meet the requirements of a wide variety of services. For this new structure, blind numerology identification can increase system ...
Cyclic Prefix (CP) jamming against eavesdropping relays in OFDM systems
(IEEE-Institute of Electrical and Electronics Engineers Inc., 2022)
Cooperative communication has been widely used to provide spatial diversity benefits for low-end user equipments, especially in ad hoc and wireless sensor networks. However, the lack of strong authentication mechanisms in ...
Secure key exchange and transmission design using artificial noise ınjection in OFDM systems
(Institute of Electrical and Electronics Engineers Inc., 2022)
Orthogonal frequency division multiplexing (OFDM) is such a vital waveform scheme that is utilized in fifth-generation (5G) communication systems as well as the previous one. Since the usage scenarios of 5G are quite wide, ...