Synchronization Signal Design Using Single-Carrier Waveform for Physical- Layer Cell ID Detection

2021 ◽  
Author(s):  
Daisuke Inoue ◽  
Kyogo Ota ◽  
Mamoru Sawahashi ◽  
Satoshi Nagata
Keyword(s):  
Physical Layer ◽  
Signal Design ◽  
Layer Cell ◽  
Single Carrier ◽  
Synchronization Signal

scholarly journals SC-FDE Layer for Sensor Networks in Remote Areas Using NVIS Communications

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1636
Author(s):  
Tomas Gonzalez ◽  
Joaquim Porte ◽  
Jordi Male ◽  
Joan Navarro ◽  
Josep M. Maso ◽  
...  
Keyword(s):  
Sensor Networks ◽  
Low Power ◽  
Large Scale ◽  
Satellite Communications ◽  
Physical Layer ◽  
Attractive Alternative ◽  
Remote Areas ◽  
Single Carrier ◽  
Ubiquitous Sensor Networks ◽  
Definition Of

Despite high costs and lengthy deployments, satellite communications have traditionally been used to provide coverage in remote areas. However, given the fact that there is no radio infrastructure available in these areas, Near Vertical Incidence Skywave (NVIS) technology has positioned itself as an attractive alternative to communicate with low-power nodes in remote areas. This type of communication works in the HF frequency range complying with STANAG and MIL-STD standards, which define a physical layer for scenarios that differ from NVIS and low-power communication. The purpose of this paper was to present the definition of a new communication physical layer based on single-carrier frequency-domain equalization (SC-FDE) based on these standards but adapted to the ionospheric communication channel. This physical layer was compared to an OFDM-based layer from a previous study. The experiments performed show that this new approach achieves better results than OFDM in terms of a higher signal quality with a higher specific BER probability. Finally, this layer was also used in the theoretical design of an NVIS gateway to link sensor network devices spanning large-scale remote areas in a secure manner in the context of ubiquitous sensor networks (USN).

scholarly journals On the Physical Layer Security Characteristics for MIMO-SVD Techniques for SC-FDE Schemes

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4757 ◽  
Author(s):  
João Madeira ◽  
João Guerreiro ◽  
Rui Dinis ◽  
Paulo Montezuma ◽  
Luís Miguel Campos
Keyword(s):  
Physical Layer Security ◽  
Communication Systems ◽  
Physical Layer ◽  
Wireless Communication Systems ◽  
Secure Communications ◽  
Secrecy Rate ◽  
Security Issues ◽  
Single Carrier ◽  
Efficient Option ◽  
Value Decomposition

Multi-Input, Multi-Output (MIMO) techniques are seeing widespread usage in wireless communication systems due to their large capacity gains. On the other hand, security is a concern of any wireless system, which can make schemes that implement physical layer security key in assuring secure communications. In this paper, we study the physical layer security issues of MIMO with Singular Value Decomposition (SVD) schemes, employed along with Single-Carrier with Frequency-Domain Equalization (SC-FDE) techniques. More concretely. the security potential against an unintended eavesdropper is analysed, and it is shown that the higher the distance between the eavesdropper and the transmitter or receiver, the higher the secrecy rate. In addition, in a scenario where there is Line of Sight (LOS) between all users, it is shown that the secrecy rate can be even higher than in the previous scenario. Therefore, MIMO-SVD schemes combined with SC-FDE can be an efficient option for highly secure MIMO communications.

scholarly journals Physical layer simulation results for IEEE 802.15.3c with different channel models

2011 ◽  
Vol 9 ◽  
pp. 173-177 ◽  
Author(s):  
M. Liso Nicolás ◽  
M. Jacob ◽  
T. Kürner
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Channel Model ◽  
Multipath Propagation ◽  
Signal To Noise Ratio ◽  
Physical Layer ◽  
Link Quality ◽  
60 Ghz ◽  
Single Carrier ◽  
Ieee 802.15.3C

Abstract. This paper investigates the performance of the 60 GHz IEEE 802.15.3c physical layer (PHY) specification in terms of bit error rate (BER) against signal to noise ratio. Two PHY modes of the standard have been implemented and simulated, i.e., Single Carrier and High Speed Interface. The first mode uses single carrier (SC) block transmission and the second mode uses orthogonal frequency division multiplexing (OFDM). One of the main issues in the new 60 GHz standards is multipath propagation, which plays an important role in the link quality. Thus, we have tested the PHY with the IEEE standard channel model, ray tracing simulations and real 60 GHz measurements.

scholarly journals A Physical Layer Security Technique for NOMA Systems with MIMO SC-FDE Schemes

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 240
Author(s):  
João Madeira ◽  
João Guerreiro ◽  
Hugo Serra ◽  
Rui Dinis ◽  
Paulo Montezuma ◽  
...  
Keyword(s):  
Physical Layer Security ◽  
Communication Systems ◽  
Multiple Access ◽  
Mimo Systems ◽  
Mimo System ◽  
Physical Layer ◽  
Hardware Complexity ◽  
Secrecy Rate ◽  
Security Issues ◽  
Single Carrier

Current wireless communication systems employ Multi-Input, Multi-Output (MIMO) techniques to increase spectral efficiency, at the cost of higher hardware complexity. Most of these systems continue to employ traditional Orthogonal Multiple Access (OMA) schemes, which are suboptimal when compared to Non-Orthogonal Multiple Access (NOMA) schemes. By combining NOMA with MIMO, it is possible to achieve higher spectral efficiencies. However, security in NOMA-MIMO systems remains a problem. In this paper, we study the physical layer security issues of a power based NOMA-MIMO system with a Singular Value Decomposition (SVD) scheme, employed along with Single Carrier with Frequency Domain Equalization (SC-FDE) techniques. We consider a scenario where there is an unintended eavesdropper attempting to listen to the messages being exchanged. It is shown that the higher the channel estimate correlation between transmitter and receiver, the higher the secrecy rate, particularly for a scenario where there is a Line-Of-Sight (LOS) between all users. Therefore, power based NOMA MIMO-SVD schemes, combined with SC-FDE, can be considered efficient options for highly secure MIMO communications.

scholarly journals Frequency Offset Tolerant Synchronization Signal Design in NB-IoT

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 4077 ◽  
Author(s):  
Jun Zou ◽  
Chen Xu
Keyword(s):  
Communication Systems ◽  
Low Cost ◽  
Frequency Offset ◽  
Wireless Communication Systems ◽  
Signal Design ◽  
Timing Error ◽  
Signal Structure ◽  
Synchronization Signal ◽  
Large Frequency ◽  
Suitable Sequence

Timing detection is the first step and very important in wireless communication systems. Timing detection performance is usually affected by the frequency offset. Therefore, it is a challenge to design the synchronization signal in massive narrowband Internet of Things (NB-IoT) scenarios where the frequency offset is usually large due to the low cost requirement. In this paper, we firstly proposed a new general synchronization signal structure with a couple of sequences which are conjugated to remove the potential timing error that arises from large frequency offset. Then, we analyze the suitable sequence for our proposed synchronization signal structure and discuss a Zadoff–Chu (ZC) sequence with root 1 as an example. Finally, the simulation results demonstrate that our proposed synchronization signal can work well when the frequency offset is large. It means that our proposed synchronization signal design is very suitable for the massive NB-IoT.

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