128results about "Frequency diversity" patented technology

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 Nbundle,1 frequency-contiguous RB s, and a PDCCH in the first control resource set in a number of frequency distributed blocks of Nbundle,1 RBs. The UE assumes that a demodulation reference signal associated with the reception of the PDCCH has a same precoding over the Nbundle,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 beamformer device is provided for WiFi communication schemes such as IEEE 802.11ax and 802.11be. The beamformer device is configured to: transmit a request to a beamformee device, the request comprising a set of sounding tone indices, the set of sounding tone indices indicating tones for which a report of beamforming information is requested from the beamformee device, wherein the tones are defined according to a first WiFi scheme, wherein the set of sounding tone indices is based on a first tone plan defined by the first WiFi scheme for a partial channel bandwidth and on a second tone plan defined by a second WiFi scheme for a full channel bandwidth. A corresponding beamformee device is further provided.

The invention discloses a microwave communication system, which comprises a first device and a second device, and is characterized in that the first device comprises a plurality of antennas, and the second device comprises a plurality of antennas; the first device is used for transmitting carrier signals of at least two frequency points through at least two antennas in the plurality of antennas, and each antenna in the at least two antennas corresponds to the carrier signal of at least one frequency point; the second device is used for receiving the carrier signals of the at least two frequency points through at least two antennas in the multiple antennas, and each antenna in the at least two antennas receives the carrier signals of the at least two frequency points. According to the scheme of the invention, the transmitting end does not need to transmit all carrier signals through one antenna, so that the carrier signals can be transmitted without power rollback or with relatively small power rollback, the combination loss when the microwave communication system transmits the carrier signals is reduced, and the gain of the microwave communication system is improved.

Secure LoRa communication device with frequency hopping The invention relates to a device combining the use of the LoRa communication protocol with frequency range hopping techniques. The device thus constituted allows to benefit from the advantages of both approaches. A large post with low power consumption and low detectability thanks to LoRa and resilience to jamming and interception thanks to frequency evasion.

The embodiment of the present application provides a backscattering method and device, the method comprising: a network device sends an excitation signal to a tag device, the excitation signal comprises a first sub-excitation signal and a second sub-excitation signal, the second sub-excitation signal occupies the same time as the first sub-excitation signal, and the phase of some symbols in the second sub-excitation signal is different from that of some symbols in the first sub-excitation signal; the network device receives an uplink signal, the uplink signal is an uplink reflection signal sent by the tag device after being transmitted through a channel, wherein the uplink reflection signal comprises a first sub-uplink reflection signal and a second sub-uplink reflection signal, the first sub-uplink reflection signal is obtained by multiplying the tag information by the first sub-excitation signal, and the second sub-uplink reflection signal is obtained by multiplying the tag information by the second sub-excitation signal; the network device performs diversity reception on the uplink signal in response to the received uplink signal. The present application can effectively improve the success rate of signal reception.

According to an embodiment, there is provided a wireless communication system that transmits data from a transmission device to a reception device by using a plurality of frequency channels, in which the transmission device includes a transfer control unit that performs transfer control to transfer a part of traffic of one or more frequency channels in which a BER reaches a predetermined value to one or more other frequency channels in which a BER does not reach the predetermined value, and a reduction control unit that performs, for traffic remaining after the transfer control unit transfers a part of traffic of the frequency channels in which a BER reaches the predetermined value, reduction control to reduce at least one of a multi-level number of multi-level modulation or a coding rate.

In order to maintain performance during wireless communication, a transmitting electronic device may concurrently and independently communicate redundant information to a receiving electronic device. In particular, information associated with a data stream may be communicated to the receiving electronic device using one or more channels by two radios using one or more wireless local area network communication protocols. The packets transmitted by the radios may preferentially include the same information. Moreover, the transmitting electronic device may attempt to maintain the redundant communication if a performance metric associated with the one or more channels degrades. For example, the transmitting electronic device may transfer communication to a different channel or may compress the information in the packets in the one or more channels if the throughput drops below a threshold value. Furthermore, the concurrent communication may allow the transmitting electronic device determine link quality without disrupting the communication of the information.

A wireless communication system configured for providing wireless communication is adapted to provide a first radio channel in a radio propagation channel and in a first frequency interval and to provide a second radio channel in the radio propagation channel and in a second frequency interval differing from the first frequency interval. The wireless communication system is to obtain first radio channel information indicating a behaviour of the first radio channel and to manage beamforming for the second radio channel based on the first radio channel information.

The present disclosure relates to techniques for beamforming, particularly for WiFi communication schemes such as IEEE 802.11ax and 802.11be. In particular, the present disclosure relates to a beamformer device (110) configured to transmit a request to a beamformee device (120), the request including a set of sounding tone indices indicating tones for which a beamforming information report (121) is requested from the beamformee device (120), the tones being defined by a first WiFi scheme, where the set of sounding tone indices is based on a first tone plan (400) defined for a partial channel bandwidth by the first WiFi scheme and a second tone plan (200) defined for the full channel bandwidth by a second WiFi scheme. The present disclosure further relates to a corresponding beamformee device.

The present disclosure provides a method and related devices for optimizing the coverage of high-orbit high-throughput satellites based on machine learning, which are characterized by including: obtaining demand information of users for satellite communication; performing clustering processing on the demand information to obtain a number of boundary points, and determining the coverage range of satellite beams according to the number of boundary points; determining a spatial topology graph of the adjacency relationship between satellite beams in the coverage range based on the spatial topology relationship between satellite beams in the coverage range; performing coloring processing on the satellite beams in the spatial topology graph through an overlay analysis method to obtain colored satellite beams; and performing frequency allocation on the colored satellite beams.

Aspects described herein relate to receiving, over downlink resources allocated in one or more symbols used for full-duplex communications, a first set of resource blocks having a first reference signal configuration that is different in at least one of uniformity or density, in frequency, of resource elements indicated for receiving a reference signal than a second reference signal configuration. At least a first number of resource elements in the first set of resource blocks can be calculated based on the first reference signal configuration, which can facilitate determination of transport block size for decoding downlink communications. Another aspect relates to transmitting according to the first reference signal configuration and / or second reference signal configuration.

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

Methods and techniques are described for increasing the reliability of data transmission at a high error performance in wireless transmission. In particular, a group of bits representing the data is split into symbol bits and carrier index bits and one or more component-interleaved symbols are generated. The one or more component-interleaved symbols correspond to complex symbols that are obtained by sequentially forming real and imaginary components of intermediate symbols out of said symbol bits; and interleaving said real and / or imaginary components among the intermediate symbols. A carrier index and a power value is determined for each of the one or more component-interleaved symbols based on the carrier index bits, and each of the one or more component-interleaved symbols is transmitted on a respective carrier given by the determined carrier index and with the determined power value.

The application provides a frequency diversity and polarization diversity transmission system based on diversity antennas, comprising a diversity antenna subsystem, a radio frequency feeding network and a baseband processing unit, the diversity antenna subsystem comprises a first diversity antenna, a second diversity antenna and a metal floor, the first diversity antenna and the second diversity antenna are both at least dual-frequency antennas and are placed in space orthogonally, the radio frequency feeding network comprises a signal phase shifter, an equivalent phase shifter, a power divider and a signal amplifying device, and can realize frequency diversity and twice polarization diversity. The frequency diversity and polarization diversity transmission system based on diversity antennas provided by the application realizes the collaborative innovation of a radio frequency front end and a baseband processing unit, and constructs a complete radio frequency baseband architecture which can simultaneously and actively realize the collaborative processing of polarization diversity and frequency diversity.

This disclosure provides a beam information indication method and an apparatus. The terminal device obtains reference domain information of a plurality of beams and a first offset corresponding to each moment, to update beam domain information, where the first offset indicates an offset of domain information of the plurality of beams relative to the reference domain information of the plurality of beams. In technical solutions provided in this disclosure, domain information of the plurality of beams can be updated with low signaling overheads. The technical solutions may be applied to a satellite communication system, to implement interference management of satellite beams.

To divide an image into blocks, group the blocks into some subsets, and associate signs the blocks in the subsets with digital information to encode the blocks by using an entropy encoding module.SOLUTION: An encoding method includes initializing a state variable of an encoding module for a first block of an image, and generating a data sub-stream representing at least one of subsets of encoded blocks. When the current block is the first block in the subset, a symbol generation probability of the first block is determined on the basis of the symbol generation probability of encoded and decoded predetermined blocks in at least one another subset. When the current block is the last encoded block in the subset, while the block in the subset is encoded, entire digital information related to a symbol is written in the sub-stream representing the subset, and the initialized sub-step is implemented.SELECTED DRAWING: Figure 2B

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may communicate on a primary carrier using a first antenna port. The UE may communicate on a secondary carrier using a second antenna port. The UE may determine whether to switch the secondary carrier from the second antenna port to the first antenna port based on a channel condition associated with the second antenna port. The UE may switch the secondary carrier from the second antenna port to the first antenna port based on a decision to switch the secondary carrier from the second antenna port to the first antenna port. Numerous other aspects are provided.

This application discloses a signal sending method, a signal receiving method, and a communication apparatus. The method includes: A first device sends a first signal to a second device on a first frequency domain unit, and sends a second signal on a second frequency domain unit. The first frequency domain unit includes a first frequency, and the second frequency unit includes a second frequency. An absolute value of a difference between the first frequency and the second frequency is related to one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is a bandwidth occupied by the first frequency domain unit in frequency domain. The second bandwidth is a bandwidth occupied by the second frequency domain unit in frequency domain. The third bandwidth is a bandwidth occupied by a third frequency domain unit in frequency domain. The third frequency domain unit is used by the first device to send a third signal to a third device. The first signal, the second signal, and the third signal are in one operating band. According to the method, interference can be suppressed without increasing complexity of a radio frequency filter.

A transmitting device (10) performing orthogonal frequency division multiplexing communication includes a subcarrier mapping unit (113) that replicates a subcarrier signal sequence and maps the replicated subcarrier signal sequences at equal subcarrier intervals, and a transmission phase rotation unit (114) that divides each subcarrier signal sequence mapped at the subcarrier intervals into two or more subsets and imparts phase rotation resulting in different time timing to each subset.

To divide an image into blocks, group the blocks into some subsets, and associate signs the blocks in the subsets with digital information to encode the blocks by using an entropy encoding module.SOLUTION: An encoding method includes initializing a state variable of an encoding module for a first block of an image, and generating a data sub-stream representing at least one of subsets of encoded blocks. When the current block is the first block in the subset, a symbol generation probability of the first block is determined on the basis of the symbol generation probability of encoded and decoded predetermined blocks in at least one another subset. When the current block is the last encoded block in the subset, while the block in the subset is encoded, entire digital information related to a symbol is written in the sub-stream representing the subset, and the initialized sub-step is implemented.SELECTED DRAWING: Figure 2B

The present application discloses a beam training method, apparatus, terminal equipment and network equipment, and belongs to the field of communication technology. The beam training method of the present application includes: measuring at least two reference signals for beam training forwarded by an auxiliary device in at least two forwarding modes to obtain measurement information, wherein the measurement information is used to indicate the optimal forwarding mode of the auxiliary device, and the forwarding mode of the auxiliary device is determined by the beam direction of the auxiliary device forwarding signal and the beam phase of the forwarding signal; and reporting the measurement information to the network device. The embodiment of the present application enables the network device to determine the optimal beam direction and optimal beam phase of the auxiliary device forwarding signal, and then can reduce the impact of frequency selective fading caused by the multipath environment based on the optimal beam direction and beam phase.

An antenna array of frequency-independent phase shifters may be configured to provide band-specific beamforming over a plurality of operating bands by determining, based on a first frequency allocation on a first operating band with first angular directions, at least a second frequency allocation on a second operation band with a second angular directions, so that a first set of predefined requirements comprising at least beamforming requirements on frequency allocations and angular directions are met on all operating bands, determining beamforming weights, and configuring the antenna array to apply the beamforming weights.

Certain aspects of the present disclosure provide techniques and architectures for the use of multi-antenna technologies that may enable wireless communication systems to exploit the spatial domain and support spatial multiplexing, beamforming, and transmit diversity across wide frequency ranges and / or multiple bands to communicate with multiple users.

An apparatus for transmitting a broadcast signal according to one embodiment of the present invention comprises: a first RF BICM unit for generating at least one first RF core layer BICM signal and at least one first RF enhanced layer BICM signal; a second RF BICM unit for generating at least one second RF core layer BICM signal; a layered division modulation unit for generating at least one layered division multiplexed signal by performing layered division multiplexing corresponding to at least a part of the at least one first RF core layer BICM signal and at least a part of the at least one first RF enhanced layer BICM signal; and a transmission signal generation unit for generating at least one first RF transmission signal corresponding to the at least one layered division multiplexed signal and at least one second RF transmission signal generated on the basis of at least a part of the at least one second RF core layer BICM signal.

Disclosed is a controller device (4) for Digitally Controllable Scatterer, DCS, assisted transmit diversity. The controller device (4) comprises a processor (41), configured to: determine (803) an encoding function (C) for encoding one or more information symbols (X, X i ) to encoded symbols (χ i , χ j,i ); and determine (804) a frequency mapping (F) for mapping the encoded symbols (χ i , χ j,i ) to frequency resources (f i ) being based on an allocated frequency (f dcs ) of a DCS (24). The controller device (4) further comprises a control communication interface (42), configured to: transmit (805) the encoding function (C) to a transmitter device (1); transmit (807) the frequency mapping (F) to the transmitter device (1) and the receiver device (3); and transmit (808) the allocated frequency (f dcs ) of the DCS (24) to a DCS device (2). This provides new space frequency coding via joint design of the DCS configuration phasors, the transmitter encoding function and the receiver processing, enabling the receiver device (3) to perform diversity combining of the received signal in order to estimate the information symbol without any CSI knowledge requirements at the DCS device (2) and transmitter device (1) and without transmitting data knowledge at the DCS.

A method for coding includes; segmenting an image into blocks; grouping blocks into a number of subsets; coding, using an entropy coding module, each subset, by associating digital information with symbols of each block of a subset, including, for the first block of the image, initializing state variables of the coding module; and generating a data sub-stream representative of at least one of the coded subsets of blocks. Where a current block is the first block to be coded of a subset, symbol occurrence probabilities for the first current block are determined based on those for a coded and decoded predetermined block of at least one other subset. Where the current block is the last coded block of the subset: writing, in the sub-stream representative of the subset, the entire the digital information associated with the symbols during coding of the blocks of the subset, and implementing the initializing sub-step.

This application discloses a signal sending method, a signal receiving method, and a communication apparatus. The method includes: A first device sends a first signal to a second device on a first frequency domain unit, and sends a second signal on a second frequency domain unit. The first frequency domain unit includes a first frequency, and the second frequency unit includes a second frequency. An absolute value of a difference between the first frequency and the second frequency is related to one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is a bandwidth occupied by the first frequency domain unit in frequency domain. The second bandwidth is a bandwidth occupied by the second frequency domain unit in frequency domain. The third bandwidth is a bandwidth occupied by a third frequency domain unit in frequency domain. The third frequency domain unit is used by the first device to send a third signal to a third device. The first signal, the second signal, and the third signal are in one operating band. According to the method, interference can be suppressed without increasing complexity of a radio frequency filter.

A communication apparatus includes: storing means for storing information indicating a first base set including a first base sequence to an N-th base sequence; shifting means for generating a first shift sequence to an N-th shift sequence by determining a shift amount based on transmission data, and cyclic shifting an n-th base sequence (n being an integer from 1 to N) by the shift amount; holding means for holding timing information indicating transmission timings of sequences; and transmitting means for transmitting each shift sequence according to the timing information, wherein the first base sequence to the N-th base sequence satisfy a first condition of: a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is not 0 when a shift amount is 0, and a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is 0 when a shift amount is different from 0 used in data transmission.

A base station is disclosed that includes a transmitting and receiving circuit that transmits an RLM reference signal (RLM-RS) to a terminal. In Frequency Range 1 (FR1), when the RLM-RS is a synchronization signal block (SSB) and the terminal does not have a capability of simultaneous transmission or reception of data and an SSB with different numerologies, the transmitting and receiving circuit does not transmit or receive data on symbols of the RLM-RS, the data being with a different subcarrier spacing (SCS) than an SCS of the RLM-RS. In Frequency Range 2 (FR2), if the RLM-RS is a quasi-co-located reference signal with active transmission configuration indicator state (TCI-state), then the transmitting and receiving circuit can transmit or receive data on symbols of the RLM-RS. In other aspects, a radio communication method and a system are also disclosed.

The application discloses a frequency diversity array time domain beam control method based on dynamic frequency offset and belongs to the field of microwave and radio frequency electronic technologies. The method comprises the following steps: obtaining a transmission time window and a target angle corresponding to a target beam pointing direction in the transmission time window; in the duration of the transmission time window, based on the target angle, dynamically determining a frequency offset increment between each array element in the frequency diversity array, wherein the frequency offset increment is in inverse proportional relationship with the value of an equivalent time parameter; based on the frequency offset increment, controlling each array element of the frequency diversity array to transmit a signal of a corresponding frequency, so that the synthesized beam continuously points to the target beam pointing direction in the transmission time window. Through dynamic phase compensation, the application offsets the phase drift caused by time accumulation; meanwhile, while reducing the bandwidth requirement, the application physically eliminates beam distortion by using frequency symmetric distribution.