A system and a method for estimating a transmission channel of a communication link. A transmitter can transmit a first transmission signal and a receiver can receive the first transmission signal through the transmission channel. The first transmission signal includes data elements and pilots, each of the pilots being located at specified locations within a time-frequency domain of the first transmission signal. The receiver can determine a level of interference for each of the pilots, the level of interference being indicative of an extent of distortion on a respective pilot caused by a second transmission signal interfering with the first transmission signal. The receiver can further determine an interference-mitigated pilot for each pilot based on the determined level of interference determined for each respective pilot. The receiver can use the determined interference-mitigated pilots to estimate the transmission channel of the first transmission signal.

Disclosed are a channel estimation method and system, a device, and a storage medium. The method includes: acquiring a channel type and a channel expression under a multi-user environment first, and then according to the channel type, determining a training sequence set, training sequences in the training sequence set being zero circular convolution sequences; and according to the channel type, the channel expression and the training sequence set, determining an output sequence.

Aspects presented herein may enable a transmitting device, such as a base station, to compress tone reservation signaling for PAPR reduction, such that the transmitting device may indicate to a receiving device the location of reserved tones and data tones of a transmission with a small payload. In one aspect, a base station estimates an UL channel based on one or more SRSs from a UE, the estimated UL channel corresponding to a DL channel. The base station selects a plurality of TR locations associated with at least one of the DL channel or the UL channel. The base station transmits, to the UE, an indication of the plurality of TR locations associated with at least one of the DL channel or the UL channel.

The present disclosure provides a channel measurement method and apparatus, an electronic device and a computer-readable storage medium. The method includes: separately determining, by each first device, a first mask sequence, and transforming the first mask sequence to obtain a second mask sequence, and processing a first measurement sequence with the second mask sequence to obtain a second measurement sequence, where the first mask sequence corresponds to the first device; and carrying, by the first device, the second measurement sequence in a channel measurement frame, and sending the channel measurement frame to at least one second device for channel measurement.

A system includes an ADC configured to generate a superposition signal by the ADC being configured to under-sample an input signal at a sampling frequency in which the input signal that is input to the analog to digital converter has a bandwidth and the sampling frequency is less than a Nyquist rate for the bandwidth of the input signal. The system includes a digital signal processor (DSP) configured to digitally process the superposition signal to separate the superposition signal into a plurality of bitstreams, where each of the plurality of bitstreams corresponds to information in a different one of a plurality of separable, distinct frequency bands within the input signal. The information in the superposition signal for at least one of the said plurality of bitstreams is present in the input signal at frequencies greater than the sampling frequency, and the DSP is configured to output said plurality of bitstreams.

The present disclosure relates to a mobile terminal, a base station and respective operation methods. The mobile terminal comprises circuitry, which in operation assumes that a base station is configured to use one of a plurality of transmission beams, receives a downlink control channel candidate and a corresponding demodulation reference signal using one of a plurality of reception beams corresponding to the assumed one of the plurality of transmission beams, performs channel estimation based on the received demodulation reference signal, and, depending on the quality, demodulates the downlink control channel candidate using the channel estimation. The channel estimation is performed using a demodulation reference signal sequence which is generated observing an association which is associating the generated sequence with the assumed one of the plurality of transmission beams such that at least two of the plurality of transmission beams are associated with different demodulation reference signal sequences.

Embodiments herein disclose a method for selecting a pilot pattern for an optimal channel estimation in a wireless network by a UE. The method includes: receiving a specified pilot pattern from a base station (BS); determining at least one channel parameter from the received specified pilot pattern, wherein the at least one channel parameter comprises a delay, a Doppler, a Demodulation Reference Signal (DMRS), a sounding reference signal (SRS), and a signal to noise ratio (SNR); estimating a minimum number of pilots required using the at least one determined channel parameter; and determining an optimal pilot pattern using a channel coefficient and the estimated minimum number of pilots, wherein the optimal pilot pattern is used for the optimal channel estimation.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station and/or a user equipment may determine a time domain resource pattern for a set of demodulation reference signals (DMRSs), wherein the set of DMRSs is included in a Type-B physical downlink shared channel (PDSCH). A base station may transmit, and the user equipment may receive, the set of DMRSs using a set of resources determined based at least in part on the time domain resource pattern. Numerous other aspects are provided.

Provided are a downlink channel state information estimation method and apparatus, a device, and a storage medium. The downlink channel state information estimation method includes sending a downlink radio frame carrying channel sounding information; receiving an uplink radio frame carrying a first downlink channel state information data set; acquiring an uplink channel state information data set; and determining a second downlink channel state information data set.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a status of a repetition procedure associated with a radio resource control (RRC) connection request message of a four-step random access channel (RACH) procedure. The UE may invoke an activity state of an RRC connection setup message monitoring procedure based at least in part on the status of the repetition procedure. Numerous other aspects are described.