A signal detection method for a MIMO-OFDM wireless communication system includes obtaining a channel matrix of each subcarrier through channel estimation for each MIMO-OFDM data packet in a plurality of MIMO-OFDM data packets; receiving a reception vector of each subcarrier; performing channel matrix preprocessing for the channel matrix of each subcarrier to generate a global dynamic K-value table, in which the global dynamic K-value table includes a global dynamic K-value corresponding to each search layer of each subcarrier; performing MIMO detection for each OFDM symbol in the MIMO-OFDM data packet, in which the MIMO detection includes performing the following steps for each subcarrier of a current OFDM symbol: reading channel matrix preprocessing results and reception vector of the current subcarrier; transforming the reception vector of the current subcarrier into an LR search domain; and performing K-best search for the current subcarrier to obtain an LR domain candidate transmission vector of the current subcarrier, in which a K-value applied to each search layer of the current subcarrier during the K-best search is a global dynamic K-value in the global dynamic K-value table corresponding to the search layer.

An apparatus, method and computer program is described comprising: obtaining time domain samples of a received radio frequency signal of a mobile communication system, wherein the radio frequency signal comprises a Physical Random Access Channel; determining an estimated power distribution for the time domain samples; determining a filtering threshold value at which a time domain sample is deemed to be due to interference, based on a defined probability level of the estimated power distribution; defining a filtering mask based on the time domain samples and the filtering threshold; and applying the filtering mask to the time domain samples to generate a filtered signal samples, wherein the filtering mask is configured to attenuate time domain samples that are above the filtering threshold.

A radio transmission device includes: a known signal generating unit that generates a first known signal and a second known signal mapped in such a manner that subcarriers for transmitting a first signal not being 0 do not overlap with each other in symbols of one time band; an IDFT unit that converts the first known signal and the second known signal from a frequency domain signal into a time domain signal; a GI inserting unit that inserts a guard interval into the first known signal and the second known signal converted into time domain signals; a transmission antenna that transmits the first known signal in which the guard interval is inserted; and a transmission antenna that transmits the second known signal in which the guard interval is inserted.

A transmission method of a physical signal, a terminal, and a base station are provided. The transmission method may include receiving first configuration information, determining a measurement time-frequency resource for a residual self-interference measurement based on the first configuration information, performing the residual self-interference measurement on the measurement time-frequency resource to obtain a measurement result, transmitting feedback information determined according to the measurement result, receiving second configuration information determined according to the feedback information and determining a duplex mode of a terminal based on the second configuration information. According to the present disclosure, interference during a signal transmission procedure may be reduced.

Disclosed are methods for avoiding, detecting, and mitigating message faults. Due to the expected large increase in electromagnetic background energy in in dense 5G and 6G networks, message faults are likely to dramatically increase, along with their costs. To avoid intermittent interference, a user device can monitor the noise level and request that the base station store incoming messages while the noise level is too high. Likewise, if a user device receives a faulted message while the noise level is high, the user device can delay the retransmission until the noise subsides. If the user device has received two faulted messages (a likely scenario in crowded urban/industrial/sporting environments), the user device can merge the two versions while selecting the message elements with the best quality (based on modulation, SNR, stability, and other criteria) and may thereby obtain a corrected message version, without resorting to a third transmission of the message.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform online spur detection and mitigation scheme. The UE may identify spurs during operation, in real time, and apply cancelation and noise equalization to address identified spurs. The UE may apply a high pass filter to reference signals. During a symbol, the UE may apply the high pass filter by estimating the channel on one or more neighbor tones (e.g., tones of higher frequency and tones of lower frequency that also carry reference symbols). Because the UE may assume that a channel will generally be smooth, and that noise may vary slowly or steadily across frequency resources, the UE may compare the channel noise of a particular tone to an average or normalized channel noise of the one or more neighbor tones.

A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving, via an antenna, a signal generated by a communication device, detecting passive intermodulation interference in the signal, the interference generated by one or more transmitters unassociated with the communication device, and the interference determined from signal characteristics associated with a signaling protocol used by the one or more transmitters. Other embodiments are disclosed.

To appropriately select a beam used in communication in an environment in which massive-MIMO beamforming is performed, there is provided a base station including: a communication unit configured to form multiple beams and perform communication with a terminal apparatus; and a control unit configured to transmit, to the terminal apparatus, first identification information of a group that is used in communication with the terminal apparatus among the first identification information allocated to groups each of which includes multiple beams to be formed.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate after a 4th generation (4G) communication system such as long-term evolution (LTE). A method of operating a base station according to various embodiments of the present disclosure may include: receiving channel information from at least one terminal, obtaining channel interference information based on the channel information, obtaining a precoder based on the channel interference information, and transmitting a transmit signal to the at least one terminal based on the precoder, the channel interference information may include timing alignment error (TAE) interference and multi-user interference, and the TAE interference may be determined based on a number of first radio access technology (RAT) symbols and a number of second RAT symbols allocated to the transmit signal.

Methods, systems, and devices for wireless communications are described. In some systems, a base station may configure multiple types of resources at a user equipment (UE) for interference management processing at the UE in examples in which the base station employs a non-linear precoding technique. The multiple types of resources configured by the base station may include a first resource type configured for measuring channel gain at the UE, a second resource type configured for measuring non-linear interference at the UE arising from lower-layer data streams, and a third resource type configured for measuring linear interference at the UE arising from higher-layer data streams. The base station may transmit one or more reference signals to the UE over each of the multiple resource types and the UE may determine both a non-linear interference measurement and a linear interference measurement based on receiving the reference signals.