Abstract: Some non-limiting embodiments of the present disclosure relate to transmitting and/or receiving of sensing. A waveform of a hyperbolic frequency modulated (HFM) chirp pulse in a frequency range is obtained. A first signal including a plurality of HFM chirp pulses is transmitted. A second signal is received, wherein the second signal is a signal resulting from reflection of the first signal by at least one target. A subsampled first signal is obtained by sampling the first signal at a sampling frequency fS below a Nyquist rate fnyq. A subsampled second signal is obtained by sampling the second signal at the sampling frequency fS. A range of the at least one target and/or a Doppler frequency is determined by processing of the subsampled first signal and the subsampled second signal.

Abstract: Some embodiments in the present disclosure relate to transmitting and/or receiving sensing signals. Based on an estimation of the mobility of a wireless device, a frame format is selected and transmitted. In a first mobility scenario (e.g., a high mobility scenario), a first frame is transmitted that includes a sensing signal having a first waveform. In a second mobility scenario (e.g., a low mobility scenario), a second frame is transmitted that includes a sensing signal having a second waveform.

Abstract: Techniques and methods are described to generate a shared secret key using channel characteristics between a transmitting device and a receiving device. A public key is transmitted to a communication device over a first wireless channel and a second wireless channel that is different from the first wireless channel. From the communication device, a first signal and a second signal both carrying the public key are received over the first wireless channel and the second wireless channel, respectively. Based on the first signal and the public key, a first channel response is calculated and, based on the second signal and the public key, a second channel response is calculated. The secret key is determined based on the first and second channel response. In this way, the generation of a channel-based shared secret key becomes more secure and robust against eavesdropping of illegitimate users, allowing for secure communication.

Abstract: An apparatus and method for a multi-service transmitter of an OFDM base station (BS) in a mixed numerology radio access network, wherein the transmitter uses a common cyclic prefix across all service types to eliminate inter-numerology interference (INI) by using a new Frequency Re-sampler (VR) component in the transmitter that converts streams of those services with smaller FFT sizes into a common larger FFT size in the frequency domain, which in effect increases their number of samples. The VR simply causes a multi-service transmitter to mimic a single-service transmitter thereby reducing the required number of ZF precoders to one and causing much fewer number of precoding operations. The transmitter sends resource configuration regarding the use of common CP for all services to each connected UE.

Abstract: The present disclosure relates to methods and apparatuses for transmitting and/or receiving data. For example a data transmitting includes obtaining first data addressed to a first wireless device and second data addressed to a second wireless device different from the first wireless device; generating a first redundancy version from the first data and a second redundancy version from the second data; obtaining common data as a separable combination of the first redundancy version and the second redundancy version; and obtaining encoded first data by forward error correction code (FEC) encoding of the first data and obtaining encoded second data by FEC encoding of the second data. The transmitter then transmits a signal carrying the encoded first data, the encoded second data, and the common data at the same time on different beams. Correspondingly, a user parses the common and the private data and combines them.

Abstract: The present disclosure relates to channel estimation, at a receiving device of a communication system employing a (re)configurable surface. The channel estimation includes beamforming search to obtain trained reflection coefficients of the configurable surface and an angle of arrival, AoA, of the signals at the receiving device. Then, based on the configurable surface and the obtained AoA at the receiving device, reflection coefficients of the configurable surface are derived for an ideal channel portion between the transmitting device and the configurable surface. According to a relation between the trained reflection coefficients and the estimated reflection coefficients, the estimation of the characteristics of a channel between the transmitting device and the configurable surface is performed. The channel estimation may be employed in user mobility tracking.

Abstract: Methods and techniques are described for increasing the spectral efficiency in wireless transmission and reception. In particular, sequential portions of data are mapped onto respective modulation symbols according to a target modulation, whereby the modulation symbols include a first modulation symbol and a second modulation symbol. First and second combined symbols are generated, which includes obtaining a first and a second linear combination of the first and second modulation symbol, with the first linear combination being different from the second linear combination. The first and second combined symbols are mapped onto a respective first and second carrier and transmitted.

Abstract: Techniques and methods are described to perform physical layer authentication, using a received signal transmitted from a communication device that has been already authenticated previously. To identify a potential attacker, a current value of a plurality of physical layer L1 parameters of the wireless channel is determined, with said L1 parameters describe for a sparse channel. A value of the plurality of L1 parameters that have been stored at the previous authentication are obtained from a storage. Based on the current value and the stored value of the plurality of L1 parameters, the communication device is authenticated. In this way, the physical layer authentication may provide for a robust and reliable authentication of communication devices in sparse communication channels, including static and dynamic wireless environments.

Abstract: Some embodiments in the present disclosure relate to scheduling sensing signals for two or more wireless devices. Requirements of sensing applications of the wireless devices are determined. Existing sensing signals are received and the characteristics of the existing sensing signals may be determined. The wireless devices having similar requirements are grouped. Each group is provided with information about existing sensing signals if the predetermined requirements for the group are fulfilled in a comparison with features of the existing sensing signals.

Abstract: Disclosed is a channel-dependent multi-carrier code division multiple access (MC-CDMA) technique with adaptive spreading codes. Adaptive spreading codes are used for each subcarrier per user which increase the security level of conventional MC-CDMA. Two different map designs are proposed: fixed and adaptive interval maps. These maps are shared among all nodes and gives information about the spreading code sequences for corresponding channel gains.

Abstract: Disclosed is a method for allocating resources for the low power backscatter devices in a sparse environment with a beamspace channel model in a symbiotic radio system. In other words, the method provides an adaptive power allocation mechanism to enhance the power of the beams incident on the backscatter devices for signal detection at the receiver in the beamspace channel model.

Abstract: Disclosed is a method for allocation of the secure pilots for integrated sensing and communication against potential security threats.

Abstract: Disclosed is to an algorithm that will increase the performance of detection processes to be performed in next generation communication systems and a method using this algorithm. The algorithm optimizes the detection performance based on the SINK values of the signals sent and reflected by the wireless communication or detection communication devices in the environment and selects the wireless communication or detection device(s) to be used to detect that object.

Abstract: This invention provides a novel transceiver design to control/compensate for the spatial-wideband effect in wideband massive multiple-input multiple-output (MIMO) systems for both sensing and communication networks. The proposed design aims to divide the ultra-wideband signal into narrow band beams and control them with a simplified exhaustive search-based precoding to align the beam angle to the target direction.

Abstract: A method for designing pilots inserted into orthogonal frequency division multiplexing (OFDM) waveform intended for channel estimation such that the channel can be seen and estimated in both time-frequency and delay-Doppler domains.

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: Disclosed is a method of reducing the Peak-to-Average Power Ratio (PAPR) for signals produced by both systems when radar and communication systems are located on the same hardware. The method has significant potential in improving the performance of the system and reducing hardware costs, especially in autonomous vehicles that use simultaneous radar and communication signals.

Abstract: Disclosed is a method to improve the confidentiality against eavesdropping in wireless communication. The method involves pre-equalizing the channel phase between the legitimate transceivers.

Abstract: Disclosed is a method for resource allocation in the delay-Doppler grid that assigns radio resources to the users in a flexible manner taking into consideration their specific requirements. The method provides a flexible structure for Orthogonal Time Frequency Space (OTFS) waveform in terms of resource allocation/scheduling. This flexibility is imperative for the ever-increasingly diverse user requirements of wireless communication systems in terms of reliability, latency, data rates, mobility, security etc.

Abstract: A method for designing pilots inserted into orthogonal frequency division multiplexing (OFDM) waveform intended for channel estimation such that the channel can be seen and estimated in both time-frequency and delay-Doppler domains. The ability of estimating the sparsest channel impulse response will provide environment mapping and therefore sensing.