The present disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communications. A UE receives first information, the first information being used for indicating M DCI blind decoding(s); monitors a first-type radio signal respectively on each of S sub-band(s) in a first time-domain resource; and performs at most M1 DCI blind decoding(s) of the M DCI blind decoding(s) on the S sub-band(s) in the first time-domain resource. Herein, the first-type radio signal detected on the S sub-band(s) is used for determining the M1 DCI blind decoding(s) out of the M DCI blind decoding(s). The above method allows the base station to make dynamic adjustments to the UE's blind decoding on PDCCH resources according to LBT results, ensuring that sufficient PDCCH resources are available and not too many PDSCH resources are preempted, and that excessive blind decodings can be avoided.

The present disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communications. A UE receives first information, the first information being used for indicating M DCI blind decoding(s); monitors a first-type radio signal respectively on each of S sub-band(s) in a first time-domain resource; and performs at most M1 DCI blind decoding(s) of the M DCI blind decoding(s) on the S sub-band(s) in the first time-domain resource. Herein, the first-type radio signal detected on the S sub-band(s) is used for determining the M1 DCI blind decoding(s) out of the M DCI blind decoding(s). The above method allows the base station to make dynamic adjustments to the UE's blind decoding on PDCCH resources according to LBT results, ensuring that sufficient PDCCH resources are available and not too many PDSCH resources are preempted, and that excessive blind decodings can be avoided.

Doppler effects are compensated for in received wireless communication signals. In a receiver a first signal is received, that was transmitted by a transmitter at a first frequency f.sub.1 and that was received at a doppler-shifted first frequency f.sub.1′ and a second signal, that was transmitted by said transmitter at a second frequency f.sub.2 and that was received at a doppler-shifted second frequency f.sub.2′ is also received. A frequency difference f.sub.S between the first frequency f.sub.1 and the second frequency f.sub.2 has a predetermined value. Based on the doppler-shifted first frequency f.sub.1′, the doppler-shifted second frequency f.sub.2′ and the frequency difference f.sub.S, the first frequency f.sub.1 is determined for pre-compensating Doppler effects in the received first signal.

Communication systems and methods in accordance with various embodiments of the invention utilize modulation on zeros. Carrier frequency offsets (CFO) can result in an unknown rotation of all zeros of a received signal's z-transform. Therefore, a binary MOCZ scheme (BMOCZ) can be utilized in which the modulated binary data is encoded using a cycling register code (e.g. CPC or ACPC), enabling receivers to determine cyclic shifts in the BMOCZ symbol resulting from a CFO. Receivers in accordance with several embodiments of the invention include decoders capable of decoding information bits from received discrete-time baseband signals by: estimating a timing offset for the received signal; determining a plurality of zeros of a z-transform of the received symbol; identifying zeros from. the plurality of zeros that encode received bits by correcting fractional rotations resulting from the CFO; and decoding information bits based upon the received bits using a cycling register code.

A device, method, and non-transitory computer readable medium to perform a method of blind equalization implemented by a filter bank multi-carrier with offset quadrature amplitude modulation (FBMC-OQAM) transmission system. A first matrix W is obtained by dividing a second matrix V by a receiver waveform matrix G. The second matrix V is obtained by calculating a total objective function J until the total objective function J is either constant or below a threshold error margin. The calculation of the total objective function J includes iterating calculations with a plurality of combination of a frequency bin p and a time slot q. Weights of the obtained first matrix W are applied to an equalizer. A received signal in the equalizer is processed using the applied weights. The weights of the obtained first matrix W are configured to minimize a total outage probability P.sub.out, TOTAL.

Example embodiments of the invention provide at least a method an apparatus to perform reporting, by the apparatus, information comprises an indication of at least one aggregation level for a performance target of a physical downlink control channel; receiving, from a network node of the communication network, an assignment for a search space set comprising at least one physical downlink control channel candidate; and based on the assignment, performing blind detection of a physical downlink control channel on the at least one assigned physical downlink control channel candidate. Further, to perform at least determining by a network node of a communication network for user equipment of the communication network information comprising at least one aggregation level for a performance target of at least one physical downlink control channel candidate and of an assigned search space set; and communicating towards the user equipment information comprising an assignment for a search space set comprising at least one physical downlink control channel candidate for performing blind detection of a physical downlink control channel on the at least one physical downlink control channel candidate.

Example synchronization signal sending and receiving methods and apparatus are described. In one example method, a terminal device determines a target frequency resource. A frequency domain position of the target frequency resource is determined based on a frequency domain position offset and a frequency interval of synchronization channels. The terminal device receives a synchronization signal by using the target frequency resource.

The present disclosure provides a method and device for multi-antenna transmission in UE and base station. The user equipment receives a first wireless signal at first; then transmits a second wireless signal, and monitors a first signaling in a first sub-time resource pool. Wherein the first wireless signal is transmitted by K antenna port group(s) and the second wireless signal is used to determine the first antenna port group. The first antenna port group is one of the K antenna port group(s). The first sub-time resource pool is reserved to the first antenna port group, or the index of the first antenna port group is used to determine the first sub-time resource pool. One antenna port group includes positive integer number of antenna ports, and the K is a positive integer greater than 1. The disclosure reduces the complexity of blind detection of downlink signaling by the UE.

Example embodiments of the invention provide at least a method an apparatus to perform reporting, by the apparatus, information comprises an indication of at least one aggregation level for a performance target of a physical downlink control channel; receiving, from a network node of the communication network, an assignment for a search space set comprising at least one physical downlink control channel candidate; and based on the assignment, performing blind detection of a physical downlink control channel on the at least one assigned physical downlink control channel candidate. Further, to perform at least determining by a network node of a communication network for user equipment of the communication network information comprising at least one aggregation level for a performance target of at least one physical downlink control channel candidate and of an assigned search space set; and communicating towards the user equipment information comprising an assignment for a search space set comprising at least one physical downlink control channel candidate for performing blind detection of a physical downlink control channel on the at least one physical downlink control channel candidate.

A transmission method is provided for a communication system in which communications using a plurality of communication methods having different transmission parameters are performed at the same frequency (in frequency bands that at least partially overlap with each other). The transmission method includes: generating a first symbol group that includes a control symbol for causing a communication partner apparatus to recognize that communication using a first communication method is to be performed and a second symbol group that includes a data symbol for the first communication method; transmitting the first symbol group at a first transmit power; and transmitting the second symbol group at a second transmit power that is smaller than the first transmit power.