A Review- Proposed Bidirectional Relaying for Improved Channel Estimation Error and Co-Channel Interference

Wireless Communication has gained a lot of interest as future generation requires higher data rates and more suitable transmission with adequate quality of service. Wireless communication suffers from various problems like Co-Channel Interference (CCI) and Channel Estimation Error (CEE). Cooperative communication is an efficient technique to deal with these types of problems by offering significant multiplexing and diversity gains without increasing power and bandwidth. Our proposed two way relaying helps to improve the overall system performance in wireless networks. Cooperative communications also deals with the various problems like fading and shadowing. It is further investigated that proposed two way relaying is spectrally efficient technique which provides a way to surmount half duplexing loss in one way relay channel

UNIVERSAL FILTER MULTICARRIER MODULATION SYSTEM WITH VARIED PARAMETERS & IMPACT ON PAPR

One of the main objectives of multicarrier modulation is to provide multiple accesses for wireless communication systems with higher data rates while having minimum out of band radiation, high spectral efficiency and less complexity. Orthogonal frequency division multiplexing (OFDM), Universal filter multicarrier (UFMC), Filter bank multicarrier (FBMC) and Generalized frequency division multiplexing (GFDM) modulation techniques have been developed to support fourth generation and beyond 4G wireless systems. Demand of high data rate in fourth generation wireless communication systems has been fulfilled by OFDM techniques but it suffers from the limitation of less spectral efficiency and high PAPR (Peak to average power ratio). Thus to support next generation wireless systems other waveform models are getting attention. Among the techniques available, UFMC seems to be attractive due to high spectral efficiency and less complexity. It has not explored much so in this paper, performance of UFMC have been evaluated with different design factors such as number of sub bands, FFT (Fast Fourier Transform) size, filter characteristics and modulation under the light of PAPR

Wavelet Transform-Spectrum Sensing

Spectrum sensing is a vital cognitive radio function that protects licensed users from dangerous interference and finds accessible spectrum for better spectrum use. In practice, however, multipath fading, shadowing, and receiver uncertainty frequently degrade detection performance. Communication performance and continuity in cognitive radio networks are heavily dependent on how well the spectrum sensing function is implemented. The significance of selecting the right wavelet system is discussed

AN IMPROVED PAPR REDUCTION TECHNIQUE FOR UNIVERSAL FILTER MULTI-CARRIER MODULATION

Universal Filter Multi-Carrier (UFMC) modulation is a potential candidate for next generation wireless communication due to its advantages like better sub carrier separation and less complexity. Higher peak to average power ratio (PAPR) affects the performance of UFMC and suitable PAPR reduction technique is required to mitigate the same. In this work, an improved PAPR reduction technique (CFC-UFMC) has been proposed for UFMC system. Performance of proposed technique is compared with existing Selective Mapping (SLM), Clipping, Companding and Clipping & Filtering methods as applied on UFMC. Simulation results show that proposed technique provides better PAPR reduction with variation in design parameters namely FFT Size, Filter Length and Bits per sub carrier as compared with other techniques. Various PAPR reduction techniques have also been compared on the basis of bit error rate

Robust and Lightweight Key Exchange (LKE) Protocol for Industry 4.0

Industry 4.0 has brought solutions for faster data accessibility, fault identification, performance analysis, and control of machines remotely by managers. Though beneficial but dangerous as the IoT (Internet of Things) nodes communicate over the unsecured wireless medium. The communication over unsecured wireless channel opened enormous ways for the illegitimate nodes to access the information and take control over the industrial machines despite being physically away. These threats can be overpowered with secure sessions; however, the exchange of keys to establish a secure session over a vulnerable channel becomes a challenge. Our approach (LKE) intend to solve this problem. LKE provides a lightweight key exchange platform to the legitimate IoT nodes and prohibit the unauthorized abuses. LKE uses lightweight Elliptic Curve Qu-Vanstone (ECQV) based implicit certificates for trust-building and generating keys among entities. All the messages exchanged are secured to prevent unauthorized access to information and preventing against forgery, replay, modification, impersonation and man-in-the-middle attacks, etc. The proposed scheme is tested on the AVISPA tool and results indicate its trustworthiness and strong resistivity against potential attacks. LKE has less computation and communication complexities due to the utilization of limited cryptographic operations which make it superior in comparison to other state-of-the-work.European Commissio

Robust and lightweight key exchange (LKE) protocol for industry 4.0

Abstract Industry 4.0 has brought solutions for faster data accessibility, fault identification, performance analysis, and control of machines remotely by managers. Though beneficial but dangerous as the IoT (Internet of Things) nodes communicate over the unsecured wireless medium. The communication over unsecured wireless channel opened enormous ways for the illegitimate nodes to access the information and take control over the industrial machines despite being physically away. These threats can be overpowered with secure sessions; however, the exchange of keys to establish a secure session over a vulnerable channel becomes a challenge. Our approach (LKE) intend to solve this problem. LKE provides a lightweight key exchange platform to the legitimate IoT nodes and prohibit the unauthorized abuses. LKE uses lightweight Elliptic Curve Qu-Vanstone (ECQV) based implicit certificates for trust-building and generating keys among entities. All the messages exchanged are secured to prevent unauthorized access to information and preventing against forgery, replay, modification, impersonation and man-in-the-middle attacks, etc. The proposed scheme is tested on the AVISPA tool and results indicate its trustworthiness and strong resistivity against potential attacks. LKE has less computation and communication complexities due to the utilization of limited cryptographic operations which make it superior in comparison to other state-of-the-work