Abstract: In the area of Joint Random Subcarrier Selection and Channel-Based Artificial Signal Design Aided PLS, a method for providing physical layer security (PLS) depending on the randomness of wireless channel is proposed. Specifically, a channel-based joint random subcarrier selection and artificial signal design are introduced to protect the communication in the presence of a passive eavesdropper which can be even stronger than the legitimate receiver. Our analysis assumes a window-based subcarrier selection method in which the strongest subcarriers in each window are selected. Chosen subcarriers are considered for secret sequence extraction. The generated channel dependent secret sequence is used for both random subcarrier selection and artificial signal design. We evaluate the efficiency of the proposed method through some representative metrics, such as secret sequence disagreement rate (SSDR), throughput and bit error rate (BER), in both perfect and imperfect channel estimation cases.

Abstract: Disclosed is a method for a secure communication method having a secret key generation technique. The novelty of the proposed method stems from enhancing physical layer security (PHY) by using channel-adaptive keys, after manipulating a channel by introducing an artificial component into the channel. An adaptively designed artificial component is cascaded with the legitimate user’s channel. In an orthogonal frequency division multiplexing (OFDM) system, subcarriers corresponding to a channel gain higher than a threshold value are selected to extract the keys. Since the number of the selected subcarriers is adaptive, the length of the generated key sequences is changing adaptively as well. Thus, the channel reciprocity property in a time division duplexing (TDD) system is utilized.

Abstract: The present disclosure relates to a method for blind identification of channel tap numbers in wireless communication by using deep neural networks (DNN). In the proposed method, it is possible to train a DNN using only the transmitted and received signals of a wireless system in order to obtain the number of channel taps. We propose a robust and efficient sparse representation technique for the identification of wireless channels. We estimate the number of channel taps which is considered as one of the sparse features of the hannel The blind estimation performed in the proposed system, enhances the spectral efficiency of the used wireless communication system since the employed DNN does not require to transmit extra signals for identifying the channel taps. In our identification method, physical insights are not available or used.

Abstract: The method of the invention is related to utilizing the convergence patterns of sparse coding for detecting a primary user emulation/signal jamming attack in a cognitive radio setting. The method basically comprises a training stage and a testing stage. Through the method, the hypothesis which shows that there is no primary user but only noise (H0), the hypothesis which shows that there is a legitimate primary user present with a right to use the spectrum and the secondary user should not use the spectrum (H1), and the hypothesis which shows that there is a primary user emulator/signal jammer in the environment (H2) can be distinguished.

Abstract: Disclosed is a secure and adaptive waveforms multiplexing system in advanced-level wireless communication systems (such as 5G and beyond systems).

Abstract: A system and method utilizing a novel dynamic sidelobe multiplexing (DSM) is proposed for the applications in beamspace multiple-input multiple-output (MIMO) systems. The DSM technique pre-codes the transmitted data over transmitter beams in order to open up a new path to the receiver.

Abstract: A method based on orthogonal frequency division multiplexing (OFDM) called OFDM-subcarrier gap and index modulation (OFDM-SGIM) is proposed in which the gaps between the active subcarriers are exploited to transmit extra bits alongside the conventional QAM symbols. Thereafter, the index modulation is combined with the new proposed OFDM-based scheme to guarantee a fixed subblock size.

Abstract: Three-dimensional (3D) printing is implemented to introduce randomness into systems and devices that are being manufactured. 3D printed physically unclonable wireless systems (PUWS) provide flexibility in system package complexity, number of physically unclonable function (PUF) based security measures/types, and customization of the PUF parameters. Using flexibility and economics of 3D printing, PUWS can combine multiple PUF measures in a 3D package for cryptographic secret keys and introduce PUFs at the physical layer of the communication system. A 3D printed wireless system packaging concept is described herein where 3D printing parameters are randomized to 1) generate new physically unclonable functions (at the physical layer), 2) generate new physically unclonable functions within the system package (rather than at integrated circuit (IC) level), and 3) combine multiple physically unclonable functions (such as optical and electrical/VIA based ones) within single device structure.

Abstract: A single carrier transmission that minimizes spectral efficiency loss and reduces out of band emission by using adaptive filtering in a block where different filter parameters are used for different symbols within a block.

Abstract: System and method for determining a position of an antenna array for optimal wireless communication. The system includes a spatially adaptive and beam-steering antenna array configured to control a wireless communications path between a first element and a second element based on a determination of wireless channel gain.

Abstract: Disclosed are various strategies on general system optimization and selection of user parameters related to waveforms during the usage of multiple waveforms and/or multiple numerology structures in fifth generation (5G) and beyond next generation cellular communication systems.

Abstract: A single carrier transmission that minimizes spectral efficiency loss and reduces out of band emission by using adaptive filtering in a block where different filter parameters are used for different symbols within a block.

Abstract: Disclosed is a method which aims to minimize the effects of inter-numerology interference between users that a base station in 5G and beyond cellular communications systems serves with multiple numerology structures by determining the users at the numerology edges optimally.

Abstract: System and method for determining a position of an antenna array for optimal wireless communication. The system includes a spatially adaptive and beam-steering antenna array configured to control a wireless communications path between a first element and a second element based on a determination of wireless channel gain.

Abstract: A system and method for providing confidentiality against eavesdropping and authentication against impersonation attacks for advanced wireless communication systems are disclosed. The method exploits ARQ as a MAC layer mechanism and artificial noise as a physical layer mechanism with maximal ratio combining to achieve secrecy. An artificial noise, not requiring class space in the channel, is designed and added to the data package based on the QoS requirements and channel condition between legitimate parties. Basically, a special AN, which does not require null-space in the channel, is designed based on the QoS requirements and the channel condition between the legitimate parties and injected to the data packet. If the same packet is requested by the legitimate receiver (Bob), an AN cancelling signal is designed and added to the next packet. Then, an AN-free packet is obtained by using MRC process at Bob, while deteriorating the eavesdropper's performance.

Abstract: According to the necessities of users under a service of one base station, the disclosed method decides how many instantaneous numerology structures should be used mostly and selects the most suitable numerologies from the existing numerology set.

Abstract: According to the necessities of users under a service of one base station, the disclosed method decides how many instantaneous numerology structures should be used mostly and selects the most suitable numerologies from the existing numerology set.

Abstract: A system and method for providing confidentiality against eavesdropping and authentication against impersonation attacks for advanced wireless communication systems are disclosed. The method exploits ARQ as a MAC layer mechanism and artificial noise as a physical layer mechanism with maximal ratio combining to achieve secrecy. An artificial noise, not requiring class space in the channel, is designed and added to the data package based on the QoS requirements and channel condition between legitimate parties. Basically, a special AN, which does not require null-space in the channel, is designed based on the QoS requirements and the channel condition between the legitimate parties and injected to the data packet. If the same packet is requested by the legitimate receiver (Bob), an AN cancelling signal is designed and added to the next packet.

Abstract: A system and method for frame structure compliant adaptive extensionless windowing that maximizes fair proportional network capacity in the download. Gains are provided by emulating the multipath multiple access channel to the base station to calculate almost-optimum transmitter windowing durations prior to transmission and using the variance of received symbols using different window durations to allow the user equipment nodes to estimate optimal receiver windowing durations without calculations requiring further knowledge about the network.

Abstract: A system and method for reducing the OFDM out-of-band emissions (OOBE) and Inter-Numerology Interference (INI) in a mixed-numerology OFDM-based system by utilizing a transmitter windowing operation that smooths the inherent rectangular pulse shape of the OFDM signals. The technique retains the main design of the OFDM receivers and provides backward compatibility for the existing OFDM-based systems. The guard band and the multi-window parameters that control the guard duration are jointly optimized regarding the numerology, the use case and the power offset between the users. To fully exploit and further increase the potential of adaptive guards, an interference-based scheduling algorithm is proposed as well.