A system and a method are disclosed for NBCE in wireless communication. A method performed by an electronic device includes receiving a narrow band reference signal; estimating frequency domain correlation matrices using the narrow band reference signal; and performing narrow band channel estimation on the narrow band reference signal, using the estimated frequency domain correlation matrices.

Certain aspects of the present disclosure are directed towards a method for wireless communications at a first device. The method generally includes: transmitting training signals using a subset of beam weights; receiving feedback signaling based on the training signals; and transmitting a communication signal with digital pre-distortion (DPD) using DPD coefficients determined based on the feedback signaling.

An apparatus including means for sending a request message to one or more network nodes. The request message includes a request for channel information related to one or more communication links of one or more second user devices. The apparatus includes means for, based on the channel information, determining a first signalling configuration related to a positioning link of a first user device. The apparatus includes means for sending the first signalling configuration to the first user device.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products directed to data augmentation of radio frequency (RF) data for improved RF fingerprinting are provided. Among the methods is method that may include any of obtaining one or more samples by sampling a radio frequency (RF) signal received at a receiver from a transmitter; determining one or more channel characteristics of a channel between the receiver and the transmitter; and performing RF fingerprinting based at least in part on (i) inputting the samples and the channel characteristics as inputs to a neural network formed using a trained neural network model, and (ii) obtaining a predicted value output from the neural network.

A method for determining a channel impulse response (CIR) estimation in ultra-wideband (UWB) communication using a supercomplementary zero-sum correlation (SZC) sequence block is provided. The method includes, obtaining, from a memory, a basic sequence of N chips and having perfect periodic autocorrelation function (PACF), N being an odd number. The method also includes performing, by a shifting logic, a circular shift of the chips in the basic sequence by a shift number to obtain a shifted sequence, the shift number being a positive number less than N. The method also includes computing, by an inverting logic, an inversion parameter of the shifted sequence. The method also includes computing, by the inverting logic, a output sequence based on the shifted sequence and the inversion parameter; and receiving, by an antenna, a transmitted sequence. The method further includes performing, by a correlator circuit, cross-correlation between the output sequence and the received sequence.

Power grid surveillance via topology detection system using power line communications (PLC) is provided by observing, at first and second times, first and second signals, respectively, sent via PLC between a plurality of nodes in an electrical grid; generating first and second lists for a given node of the plurality of nodes of channel impulses responses (CIRs) for the given node to communicate with other nodes in the plurality of nodes respectively based on the first and second signals as observed; identifying from the first list and the second list a certain node with a highest variation in CIR between the first time and the second time; sending a first token for the given node from the given node to the certain node via PLC; and in response receiving a second token from the certain node at the given node, generating a topology change alert.

Aspects of this disclosure relate to reference signal channel estimation. A wireless communication channel between two nodes can be estimated based on a received reference signal, such as a Sounding Reference Signal. Techniques are disclosed to improve performance of reference signal channel estimation and make channel estimates more robust in the presence of one or more of a variety of impairments. Frequency domain processing and/or time domain processing can be performed to reduce distortion in channel estimates.

Embodiments of the present disclosure provide a method for suppressing channel replica caused by carrier frequency offset (CFO). The method includes: generating, by an analog-to-digital converter (ADC), a plurality of samples after receiving a sequence of chips by an antenna; accumulating, by an accumulator, the plurality of samples to generate an initial channel impulse response (CIR); comparing the CFO with a threshold value; in response to the CFO being greater than the threshold value, applying a filtering operation on the initial CIR estimate, the filtering operation configured to reduce an intensity of a sidelobe in the initial CIR estimate while maintaining an intensity of a main lobe in the initial CIR estimate; and generating a final estimated CIR based on the filtered initial CIR estimate.

A receiver including a plurality of wave receivers that receive signals arriving from a predetermined direction, a plurality of detection units that is connected to at least some of the plurality of wave receivers and detect arrival times of signals received by a connected wave receivers, and a plurality of adjustment units that adjust a deviation between arrival times of the plurality of wave receivers based on arrival times or arrival directions of the plurality of detected signals.

In some aspects, there is provided a method. The method may include estimating, based on a first signal-phase in a plurality of signal-phases associated with an input signal, a first channel impulse response; estimating, based on a second signal-phase in the plurality of signal-phases, a second channel impulse response; selecting, based on at least one characteristic of the estimated first channel impulse response and the estimated second channel impulse response, a signal-phase from the plurality of signal-phases; equalizing, based on the selected signal phase, the input signal to produce an equalized signal; and outputting, to a symbol detector, the equalized signal. Related systems, methods, and articles of manufacture are also disclosed.