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.

Disclosed is a method for wireless communication. The method comprises receiving, from a network node, a reference signal (RS) of a first type. An input signal of a second type is determined based on the reference signal. Signals of the second type are associated with training a first machine learning (ML) model applied by a UE to estimate a parameter used in wireless communications by the UE. The input signal of the second type is applied to the first ML model to estimate the parameter used in wireless communications by the UE.

A method and system include a symbol processing block to generate log likelihood ratios (LLRs) associated with one or more data symbols. The method and system include a channel estimation (CE) module to receive the LLRs from the symbol processing block, and to process iterative CE (ItCE) for new radio (NR) based at least on reference signals and the LLRs. The CE module can process the ItCE with a granularity of one or more resource blocks (RBs) based at least on pilot resource elements (REs) and virtual pilot REs obtained from the LLRs. The CE module can process the ItCE based at least on a frequency domain orthogonal cover codes (FD-OCC) structure of the reference signals. The reference signals can be demodulation reference signals (DMRS) configured in 5G NR. The CE module can process the ItCE by updating a CE result by adding a quantity that represents a contribution obtained from virtual pilot REs.

Disclosed herein is a method of performing quantum channel estimation. The method is performed by a first device of a transmission device, and may include a first quantum state transmission step of transmitting a first quantum state including an N-qubit sequence to a second device of a reception device through a quantum channel, a second quantum state information reception step of receiving information about a second quantum state () received by the second device through the quantum channel from the second device, and a quantum channel estimation step of estimating the quantum channel based on the received information about the second quantum state ().

A device and method for performing channel estimation, including in a first iteration of channel estimation, determining a channel estimate based on at least a first pilot symbol of a reference signal received at the device; and in each respective iteration of one or more ensuing iterations determining a reference channel estimate based on at least one subsequent pilot symbol of the reference signal; decoding a data signal received at the device based on the reference channel estimate; determining a data channel estimate based on at least one data symbol from the decoded data signal; and calculating a channel estimate for the respective iteration based on the reference channel estimate, the data channel estimate, and a channel estimate from a previous iteration.

Systems, devices, and techniques relating to multi-symbol channel estimation are described. A described technique includes receiving a signal comprising first and second training symbols, and one or more data symbols; determining first and second channel estimates for subcarriers respectively based on the first and second training symbols; determining a dynamic timing advance estimate based on the first training symbol to adjust a sampling time for a remaining portion of the signal; determining one or more phase differences between the first and second training symbols for the subcarriers respectively based on angular versions of the first and second channel estimates; rotating the first channel estimates based on the dynamic timing advance estimate and the one or more phase differences; producing combined channel estimates based on the second channel estimates and the rotated first channel estimates; and processing the one or more data symbols based on the combined channel estimates.

The present invention relates to a method and apparatus for channel estimation between a transmitter and a receiver in a wireless communications system. In one arrangement, the method comprises: receiving at the receiver a first sequence of bits representing a first sequence of coded symbols transmitted over the communications channel; decoding the first sequence of coded symbols using maximum-likelihood based decoding including: generating traceback outcomes by tracing backwards the first sequence of bits through a maximum-likelihood based traceback path, the traceback outcomes including a first portion associated with a first traceback depth and a second portion associated with a second traceback depth that is deeper than the first traceback depth; generating a channel estimate of the communications channel based on the first portion of the traceback outcomes; and generating an estimate of at least some information bits coded in the first sequence of coded symbols based on the second portion of the traceback outcomes.

Methods and systems are described for jointly processing multiple sectors in a wireless communication network. In one aspect, a first antenna serving a first sector is associated with a second antenna serving a second sector for joint processing. First and second antenna data is received. A plurality of wireless users associated with at least one of the first or second antenna data to model for channel estimation is determined, including an interfering wireless user connected via a third antenna serving a third sector not currently being jointly processed with the first or second antenna data. Channel estimates are determined for the plurality of wireless users. The first and second antenna data is jointly processed. Interference from the wireless user connected via a third antenna is suppressed based on a determined corresponding channel estimate for the wireless user and other received information for the wireless user.

Systems and methods for detecting and estimating parameters for a phase-modulated signal in a continuous manner with near-optimal performance. The methods generate these estimates using streaming (or on-the-fly) calculations and so are suitable for hardware-based implementation. These estimates can be used as part of standard pulse descriptor words for radar and other pulsed or continuous signals that are reported by an electronic warfare receiver to a processing and display system. Also, the methods can be computed using sub-sampling methods in order to reduce overall computations.

The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method for selecting a radio frequency beam by a receiving apparatus in a wireless communication system supporting a beamforming scheme includes determining a number of reference signal intervals in which a reference signal is transmitted based on a number of transmitting apparatuses, estimating full channel information by repetitively performing a partial channel estimating based on the number of reference signal intervals, and selecting a reception RF beam and a transmission RF beam for each of the transmitting apparatuses based on the full channel information.