The present application discloses a channel estimation method and apparatus, a device, and a readable storage medium. The channel estimation method includes: receiving, by a communication device, a pilot signal and a data signal; determining, by the communication device, a linear feature according to the pilot signal; determining, by the communication device, a nonlinear feature according to the data signal; and performing, by the communication device, channel estimation according to the linear feature and the nonlinear feature.

A method for a user equipment (UE) to receive physical downlink control channels (PDCCHs) is provided. The UE receives configuration information for a first control resource set that includes a number of symbols in a time domain and a number of resource blocks (RBs) in a frequency domain, configuration information indicating a first number of N.sub.bundle,1 frequency-contiguous RB s, and a PDCCH in the first control resource set in a number of frequency distributed blocks of N.sub.bundle,1 RBs. The UE assumes that a demodulation reference signal associated with the reception of the PDCCH has a same precoding over the N.sub.bundle,1 RBs. A method for constructing a search space to reduce a number of channel estimations that the UE performs for decoding PDCCHs, relative to conventional search spaces, is also provided.

A communication system that minimizes the transmission of pilot symbols while ensuring real-time channel tracking and symbol detection. The system employs a multiple-input multiple-output (MIMO) transmitter-receiver pair where there are many more receive antennas than transmit antennas. Communication occurs over a wide band RF channel via orthogonal frequency division multiplexing (OFDM) that employs a large number of sub-carriers.

The present disclosure relates to a communication technique for converging IoT technology with 5G communication systems for supporting higher data transmission rates than 4G systems and to a system therefor. The present disclosure can be applied to intelligent services (e.g. smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security- and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. The method for data decoding by a terminal in a wireless communication system according to the present disclosure comprises the steps of: receiving subframes on the basis of a configuration; obtaining at least one channel phase value on the basis of available subframes, which are configured to transmit identical downlink data, among the received subframes; correcting the other channel phase value(s) with any one of said at least one obtained channel phase value as a reference value; and decoding the downlink data by means of the reference value and the corrected channel phase value(s).

A method for a user equipment (UE) to receive physical downlink control channels (PDCCHs) is provided. The UE receives configuration information for a first control resource set that includes a number of symbols in a time domain and a number of resource blocks (RBs) in a frequency domain, configuration information indicating a first number of N.sub.bundle,1 frequency-contiguous RBs, and a PDCCH in the first control resource set in a number of frequency distributed blocks of N.sub.bundle,1 RBs. The UE assumes that a demodulation reference signal associated with the reception of the PDCCH has a same precoding over the N.sub.bundle,1 RBs. A method for constructing a search space to reduce a number of channel estimations that the UE performs for decoding PDCCHs, relative to conventional search spaces, is also provided.

A communication system that minimizes the transmission of pilot symbols while ensuring real-time channel tracking and symbol detection. The system employs a multiple-input multiple-output (MTMO) transmitter-receiver pair where there are many more receive antennas than transmit antennas. Communication occurs over a wide band RF channel via orthogonal frequency division multiplexing (OFDM) that employs a large number of sub-carriers.

What is disclosed is a method for wireless communication comprising receiving a wireless communication via a receiver of the mobile communication device, deriving a demodulation reference signal from a first plurality of symbols of the wireless communication; creating a channel estimation matrix using the demodulation reference signal; inverting the channel estimation matrix to obtain a channel pseudo-inverse matrix; deriving a tracking reference signal from a second plurality of symbols of the wireless communication; calculating a phase shift for one or more additional symbols based on the tracking reference signal; determining a corrected channel pseudo-inverse matrix for the one or more additional symbols by adjusting the channel pseudo-inverse matrix according to the calculated phase shift; and controlling the receiver to accomplish data detection using the corrected channel pseudo-inverse matrix on one or more orthogonal frequency division multiplexing subcarriers.

Devices and methods for decoding a symbol transmitted over a millimeter wave (mmWave) channel. Receiving a test symbol transmitted over the mmWave channel. Estimating channel state information (CSI) of the mmWave channel using a block sparse signal recovery on the test symbol, according to a multi-dimensional spreading model with statistics on multi-dimensional paths. The multi-dimensional spreading model with statistics on multi-dimensional paths include an angle of departure (AoD), angle of arrival (AoA), and a path spread for the AoD and a path spread for the AoA, propagating in the mmWave channel. Receiving a symbol over the mmWave channel, and decoding the symbol using the CSI, wherein steps of the method are performed by a processor of a receiver.

A reference signal processing method, user equipment, and a base station are provided. First indication information sent by a base station is received by a user equipment UE. The first indication information is used to indicate a quantity M of time segments included in a target OFDM symbol, where MN, and N is a quantity of subcarrier spacings between neighboring subcarriers in frequency domain in a first subcarrier set used to carry a reference signal in the target OFDM symbol, and M and N are positive integers. The M is determined by the UE. and sending, by the UE, A time segment signal of the reference signal is sent by the UE to the base station, or a time segment signal of the reference signal that is sent by the base station is received the UE. The embodiments of the application improve time frequency resource utilization for beam training.

A user terminal receives a downstream link data signal, a demodulation reference signal for demodulating the downstream link data signal, and a downstream link signal including a downstream link control signal; calculates a channel estimation value using the demodulation reference signal; demodulates the downstream link data signal using the channel estimation value; and demodulates the downstream link control signal using the channel estimation value calculated from the demodulation reference signal mapped to a symbol before a symbol to which the downstream link control signal is mapped in a sub-frame.