A signal receiving apparatus includes a phase recovery look, a phase estimation circuit, a phase noise detection circuit, and a bandwidth setting circuit. The phase recovery loop performs a phase recovery process on an input signal according to a bandwidth setting. The phase estimation circuit generates an estimated phase associated with the input signal. The phase noise detection circuit determines a phase noise amount according to the estimated phase. The bandwidth setting circuit calculates an average and a variance of the phase noise amounts, and adjusts the bandwidth setting of the phase recovery loop according to the average and the variance.

A method for limiting impulse noise in a radio signal, in particular in the FM band, that is multiplexed and intended to be received by an FM receiver that is for example located on-board a vehicle. The method includes detecting impulse noise by way of a calculation of a score IND, for a sequence of successive samples of the demodulated radio signal FM MPX, while taking into the account, on the one hand, a capacity to detect a drop in the modulus of the ratio I/Q, which is dependent in particular on data derived from a sensor level, and, on the other hand, a capacity to detect high-frequency noise, which in particular depends on data derived from a sensor modulation.

Provided are a method and apparatus for estimating and correcting the phase error in 5G or pre-5G communication systems providing much higher data rates compared to existing 4G communication systems including LTE systems. The existing phase error estimation scheme using a cyclic prefix in the time domain may fail to prevent performance degradation due to inter-carrier interference. In the present invention, it is possible to enhance reception performance of the receiver by estimating and correcting the phase error multiple times within a symbol using a time domain signal and by reducing the influence of inter-carrier interference.

A system and a method are disclosed for performing data-aided channel tracking for a subcarrier, including obtaining a reference channel estimate (CE) at a first time instance using a reference signal; determining, based on the obtained reference CE and based on received data symbols, a data-aided CE at a second time instance that is subsequent to the first time instance; and sequentially determining one or more additional data-aided CEs, for one or more time instances subsequent to the second time instance, based on a data-aided CE obtained at a previous time instance and based on the received data symbols.

Provided is an operation method of a user equipment performing narrowband Internet of Things-based communication, the operation method including determining a delayed distance based on at least one of a channel characteristic and a channel estimation technique-related coefficient, estimating, based on a time axis, a channel of a target subframe using reference signals of subframes from a start subframe prior to the target subframe to an end subframe corresponding to a determined delayed distance after the target subframe, and decoding the target subframe based on the estimated channel.

A device for mitigating a first group delay of a lowpass filter configured to lowpass filter a first channel coefficient of a set of channel coefficients with respect to time, includes a prediction filter configured to filter a data sequence derived from a lowpass filtered first channel coefficient to generate a prediction value of the lowpass filtered first channel coefficient; and an adjustment circuitry configured to adjust the prediction filter to generate the prediction value having a second group delay that is less than the first group delay.

An objective of the application is to provide a method and apparatus for obtaining downlink data in a massive MIMO system. Specifically, the base station transmits a downlink control signaling indicating downlink channel estimation information to a user equipment, wherein the downlink control signaling comprises corresponding effective channel mean value information; performs zero-forcing precoding to a to-be-transmitted signal on each subcarrier of a transmission sub-band; transmits the zero-forcing precoded signal to the user equipment. Compared with the prior art, the base station in the present application can perform zero-forcing precoding to signals on each subcarrier and transmitting a DL control signaling indicating downlink channel estimation information to a user equipment, such that the user equipment can perform demodulation based on an effective channel mean value information in the DL control signaling but does not rely on the DL reference signal, thereby achieving reduction of precoding granularity and signaling overheads, system performance also be enhanced greatly.

The present invention relates to a reception apparatus. The reception apparatus includes a plurality of reception antennas; and a signal processing unit configured to use reception characteristic of the plurality of reception antennas, wherein the signal processing unit comprises a channel estimation unit configured to respectively estimate a channel response matrix of each signal received via the plurality of reception antennas, and a coding unit configured to define a coding matrix based on an inverse matrix of the estimated channel response matrix, and to obtain a final output signal corresponding to each reception antenna by applying the coding matrix to each received signal.

To provide a phase noise optimization device and a phase noise optimization method which are capable of automatically measuring optimum phase noise according to an offset frequency. There is included a phase noise data generation unit 28 that generates at least two types of phase noise data corresponding to at least two low-pass filters (LPFs) 15a and 15b selected by a filter selection unit 16 in at least one measurement frequency range, set in advance, out of a plurality of measurement frequency ranges, a comparison unit 29 that compares at least two types of phase noise data, and a phase noise optimization unit 30 that generates optimized phase noise data based on a comparison result of the comparison unit 29.

Provided are a method and apparatus for estimating and correcting the phase error in 5G or pre-5G communication systems providing much higher data rates compared to existing 4G communication systems including LTE systems. The existing phase error estimation scheme using a cyclic prefix in the time domain may fail to prevent performance degradation due to inter-carrier interference. In the present invention, it is possible to enhance reception performance of the receiver by estimating and correcting the phase error multiple times within a symbol using a time domain signal and by reducing the influence of inter-carrier interference.