39 results about "Channel adaptation" patented technology

Systems, devices and methods for updating link adaptations in multi-carrier modulated signals between an access point (AP) and a wireless local area network (WLAN) station (STA) include (are configured for) periodically transmitting a channel sounding signal from the AP. The STA receives each unsolicited channel sounding signal and evaluates the current channel conditions between the AP and STA. The AP adjusts a rate of transmission of the channel sounding signals in accordance with the channel coherence time so that the channel estimates performed by the STA will be valid within the time varying characteristics of the channel. Depending on the length of the coherence time for network environment, the channel sounding signals may be AP beacons, low overhead signal fragments with no payload, or a combination of both.

The traffic indication and channel adaptation apparatus for a subscriber station in a sleep mode according to the present invention includes: a channel resource allocator for generating resource allocation information allocating an uplink channel resource to the subscriber station; a traffic indication and channel adaptation controller for generating a traffic indication message transmitted with the resource allocation information to the subscriber station, and providing a downlink data having a transmission level determined by applying an AMC level according to a CQI report message transmitted from the subscriber station; a transmitter for transmitting the uplink resource allocation information, the traffic indication message, and the downlink data to the subscriber station; and a receiver from receiving a CQI codeword or a CQI report message.

A system for Digital Subscriber Line (DSL) data communications, and therefore the transceiver that contains the transmitter and the receiver implementing such system, based on Single Carrier Modulation (SCM). The invention includes an efficient vectoring structure that provides novel solution for crosstalk (505 and 506) elimination in SCM systems, which allows the cooperative operation at the transmitter (511) side as well as at the receiver (512) side.

The present invention also includes a preamble insertion in a specific location of the transmission path, which makes possible the synchronization, direct channel response (503 and 504) estimation, crosstalk channel responses estimation and noise (507 and 508) estimation in agile manner, to make a continuous tracking of the changes of the channel (503 to 506) and the noise environment (505 to 508). It allows operation with low noise margin.

For approaching the capacity of the channel the present invention also defines the blocks that compose the forward error correction and their corresponding location to operate near to the channel capacity limit.

A method, apparatus and system relate to detecting an interfering device in a wireless network such as a wireless local area network (WLAN). In wireless networks using orthogonal frequency division multiplexing (OFDM) and adaptive bit loading (ABL), adaptive modulation information should be somewhat symmetric in uplink and downlink directions. By comparing modulation adaptations in the uplink and downlink directions of a communication channel between at least two terminals, identified differences can indicate the presence of a potential interferer in the wireless network. A location of the potential interferer can be estimated if a location of one or more network terminals experiencing interference is known or can be determined. An exemplary implementation for a device of the invention may be as an Access Point (AP) in the WLAN.

Wired and wireless communication networks can be subject to noise and interference resulting data corruption. In a communication system comprising a first network device and a second network device, the first and the second network devices can be configured for optimizing the data rate of the communication system. On receiving a multi-band signal at the first network device from the second network device during a channel adaptation mode, the multi-band signal can be split into a plurality of independent frequency band signals. A performance measurement of a first of the plurality of frequency band signals corresponding to a lowest frequency band signal can be calculated. Communication parameters can be determined for each of the plurality of frequency band signals based on the performance measurement of the first of the plurality of frequency band signals. The communication parameters can be provided from the first network device to the second network device.

The invention discloses a cooperative communication multi-resolution self-adapting wave beam forming method which solves the codebook mismatching phenomenon and the problem of low backward channel frequency spectrum utilization ratio in the prior art. The method comprises the following concrete steps of: (1) building a plurality of codebooks of different resolutions according to performance requirements of a system, and storing at a transmitting end and a receiving end; (2) estimating an equivalent channel matrix from the transmitting end to the receiving end, and carrying out singular value decomposition (SVD); (3) searching an optimal wave beam forming matrix from the codebook set according to the performance requirements of the system, and feeding back index numbers to the transmittingend; and (4) finding out an optimal wave beam forming matrix from a local codebook set according to the received index numbers by the transmitting end, thus forming a wave beam. The cooperative communication multi-resolution self-adapting wave beam forming method has the advantages of stronger self adaptivity and smaller average feedback data amount on different channel scenes, realizes the channel adaptation as highest as possible, and improves the frequency spectrum utilization ratio of the backward channel of a cooperative communication system.

The invention discloses a communication method and system for a multi-client-channel fused service platform. The system for the multi-client-channel fused service platform comprises a client side, a channel adaptation module and a unified session module; the channel adaptation module is connectedly integrated with the unified session module through a REST interface; multiple signal receiving endsare arranged in the channel adaptation module; the signal receiving ends are used for obtaining and marking a service request of the client side; the client side is used for sending the service request; various ports of the client side and the signal receiving ends of the channel adaptation module separately correspond to each other, and are matched; the unified session module comprises a requesttransceiving module and a session module; the unified session module transmits a signal to a presence management system through the request transceiving module; and, after system verification, the presence management system can communicate with a client. According to the communication method and system for the multi-client-channel fused service platform disclosed by the invention, multiple-channelcalls can be carried out; a communication channel between the client and the platform can be greatly increased; session and communication limitation can be reduced; and thus, the overall session efficiency can be increased.

The invention provides a applet channel adaptation method and device and an electronic device, and the method comprises the steps: responding to a channel selection operation for a user interaction interface, and determining a target channel to be adapted to a target applet at present based on the channel selection operation; wherein a plurality of channels to be selected are provided on the userinteraction interface; obtaining a universal interface adaptation code, and a target adapter and a target configuration file corresponding to the target channel from the channel basic configuration directory; based on the logic code of the target applet, the target adapter, the target configuration file, the basic resource of the target applet and the universal interface adaptation code, executinga preset packaging process, and generating a channel operation package body of a target channel corresponding to the target applet; wherein the channel operation package body comprises a logic code of the target applet, a target adapter and a universal interface adaptation code. According to the method and the apparatus, the channel operation package body of the applet for each channel can be quickly generated, so that the efficiency of adapting the applet to multiple channels is improved.

The invention requests for protecting a large-scale MIMO system energy efficiency optimization method based on wireless energy transmission under hardware damage. The invention builds a large-scale MIMO system energy efficiency optimization method based on wireless energy transmission under a hardware damage condition; an admissible control mechanism is introduced while the QoS requirement of a user is ensured; an original non-linear fractional programming problem is simplified via equivalent conversion and variable replacement and finally converted into a convex optimization problem, and computation is performed by using a block coordinate descent method. The method provided by the invention has the advantages of low computation complexity and strong channel adaptation, and meanwhile ensures QoS constraint of the sensor node, so as to be particularly applicable to the large-scale MIMO system based on wireless energy transmission under the hardware condition.

The invention discloses a multi-input and multi-output channel adaptation method and a multi-input and multi-output channel adaptation device. The method comprises that: a base station receives and stores rank indicator (RI) report layers and channel quality indicator (CQI) report of a channel represented by an RI reported by user equipment (UE), wherein RIreport is the number of the RIreport layers; the base station performs adaptive processing on the RIreport to obtain RIadaptive layers used by a current transmission time interval (TTI) of the UE, wherein RIadaptive is the number of the RIadaptive layers; and the base station compares the RIadaptive and the RIreport, computes the spectral efficiency SpecEffa of the RIadaptive layers according to a comparison result and the CQIreport, determines layers corresponding to the RIadaptive layers on codewords according to correspondence between the numbers and the codewords to obtain the spectral efficiency SpecEffa of each layer on the codewords, takes mean values of the spectral efficiency SpecEffa of all the layers on the same codewords as the spectral efficiency on the codewords, and determines modulation and coding schemes (MCS) on the codewords according to the spectral efficiency on the codewords and mapping relationships between the spectral efficiency and the MCSs. In the method and the device, the MCSs of the adapted codewords are determined by the RIreport of the channel represented by the RI reported by the UE and the CQIreport, so the capacity of a multi-input and multi-output (MIMO) channel can be more fully utilized.

The present invention relates to channel adaptation for multicarrier arrangement. Implementations related to updating channel adaptation parameters are described. In one implementation, an R2T frame, such as an acknowledgment (ACK) frame, is modified to carry a partial bit allocation table (BAT). The R2T frame may be received by a transceiver apparatus and the partial BAT carried in the header or extended header(s) of R2T frame may be used to update a BAT stored in the transceiver. In another implementation, a message frame is modified to carry a partial BAT. The message frame may be received by a transceiver apparatus and the partial BAT used to update a BAT stored in the transceiver. A unique identification number generated by the receiving transceiver apparatus may be used to synchronize BATs stored in two communicating transceivers without necessity of exchanging additional control messages.

A receiver (100) relates generally to channel adaptation. In this receiver (100), a first signal processing block (101) is coupled to a communications channel (20). The first signal processing block (101) includes: an AGC block (102) and a CTLE block (103) for receiving a modulated signal (21) for providing an analog signal (104); an ADC (105) for converting the analog signal (104) to digital samples (106); and an FFE block (112) for equalizing the digital samples (106) to provide equalized samples (114). A second signal processing block (111) includes: a DFE block (113) for receiving the equalized samples (114) for providing re-equalized samples (116); and a slicer (123) coupled to the DFE block (113) for slicing the re-equalized samples (116). A receiver adaptation block (150) is coupledto the first signal processing block (101) and the second signal processing block (111). The receiver adaptation block (150) is configured for providing an AGC adaptation, a CTLE adaptation, and a slicer adaptation to the communications channel (20).

The invention provides a software package generation method and device, a storage medium and an electronic device, and the method is applied to the association display of historical data, and comprises the steps: obtaining a source Android application package APK file of an online game and the configuration information of a plurality of target publishing channels; decompiling the source APK file to obtain an intermediate file; and generating a plurality of first target APK files according to the intermediate file and the plurality of pieces of configuration information, each first target APK file corresponding to one target release channel. Through the method and the device, the technical problem of low efficiency of generating the multi-channel APK file in related technologies is solved,the development efficiency of the APK file is improved, and the channel adaptation rate of the APK file is improved.

The invention discloses an integrated machine for fixing and cooling for tea, belonging to the technical field of tea processing equipment and used to solve the problems of large space occupation, long cooling time and uneven cooling of a cooling device for tea after greening. Including a concentration box, the upper end of the concentration box is provided with a feeding port, the lower end of the concentration box is provided with a discharge port, the upper section of the concentration box is provided with a fixing cylinder, the fixing cylinder is connected with a rotating shaft, the rotating shaft is connected with a driving device, and the inner wall of the fixing cylinder is provided with a The spiral rib that drives the tea leaves to move in the barrel, the end of the barrel away from the feed port is provided with a connecting channel; a cooling pipe is arranged below the barrel, and the cooling pipe is also sleeved with a spiral ring groove, and the connecting channel and the spiral chute are mutually connected. The lower end of the spiral chute is adapted to the discharge port, the upper end of the cooling pipe is connected with a water storage tank, the lower end of the cooling pipe is connected with a water pump, and the water pump and the water storage tank are connected to each other through the connecting pipe.

The embodiment of the invention discloses a CAN (Controller Area Network) channel adaptation method, device and system and an automobile. The method comprises the following steps: receiving messages which conform to the same communication protocol from N CAN channels, wherein N is a natural number being greater than or equal to 2; judging information corresponding to the CAN channels satisfies a preset condition or not respectively; setting corresponding identifiers for the CAN channels in response to the fact that the information corresponding to the CAN channels satisfies the preset condition; and sending response messages to the CAN channels according to the corresponding identifiers set for the CAN channels. Through adoption of the CAN channel adaptation method, device and system and the automobile, the problem of over-high communication load rate of a CAN bus can be solved.