1380 results about "Channel parameter" patented technology

A parameter transformer generates level parameters, indicating an energy relation between a first and a second audio channel of a multi-channel audio signal associated to a multi-channel loudspeaker configuration. The level parameter are generated based on object parameters for a plurality of audio objects associated to a down-mix channel, which is generated using object audio signals associated to the audio objects. The object parameters have an energy parameter indicating an energy of the object audio signal. To derive the coherence and the level parameters, a parameter generator is used, which combines the energy parameter and object rendering parameters, which depend on a desired rendering configuration.

A communication device and method are provided for communicating with a receiving device over a channel within a mobile ad-hoc network. The receiving device includes a clear-to-send (CTS) packet generating portion that can generate and a CTS packet based on a parameter of the channel and that can transmit the CTS packet over the channel. The communication device includes a transmitter portion, a receiver portion and a management portion. The transmitter portion can transmit information into the channel. The receiver portion can receive information from the channel. The management portion includes a request-to-send (RTS) packet generating portion, a CTS packet receiving portion, a threshold database, a comparator and an RES packet generating portion. The management portion is in communication with the transmitter portion and the receiver portion. The RTS packet generating portion can generate a RTS packet and can provide the RTS packet to the transmitter portion. The transmitter portion can transmit the RTS packet to the receiving device by way of the channel. The receiver portion can receive the CTS packet from the receiving device by way of the channel and can provide the CTS packet to the CTS packet receiving portion. The threshold database can store a threshold value for the parameter of the channel and can provide the threshold value to the comparator. The CTS packet receiving portion can provide channel parameter information, to the comparator, based on the CTS packet. The comparator can compare the threshold value and the channel parameter information and can generate an instruction signal based on the comparison. The RES packet generating portion can generate an RES packet based on the instruction signal and can provide the RES packet to the transmitter portion.

A method of supplying channel information in a wireless communication system comprises a mobile terminal normally providing a basic channel report to the wireless communication system; the mobile terminal receiving at least one common feedback criterion broadcast to a plurality of mobile terminals; the mobile terminal determining if the mobile terminal satisfies a condition based on the at least one common feedback criterion; and the mobile terminal selectively providing an enhanced channel report to the wireless communication system based on the determining. The basic channel report may comprise information related to a first set of channel parameters, and the enhanced channel report may provide greater detail on the first set of channel parameters and / or relate to a second set of channel parameters. A method of a base station adaptively controlling channel information reporting by broadcast transmitting at least one common feedback criterion is also presented.

Systems and methods that provide channel-adaptive antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.

In a communication system, and in particular a wireless Orthogonal Frequency Division Multiplexing (OFDM) communication system, the present invention provides systems for estimating parameters of a channel across which a signal is transmitted. The present invention may be used in a Multi-Input, Multi-Output (MIMO) system in which the data is transmitted from any number of transmitting antennas and received by any number of receiving antennas. The number of transmitting and receiving antennas does not necessarily have to be the same. Circuitry is provided for calculating parameters indicative of the characteristics of the communication channel. Estimates of channel parameters may include channel estimates and noise variance estimates.

A method is provided for automatically improving throughput of an active channel in a communication system comprising: receiving input from one or more modules that identify and characterize impairments in the active channel; monitoring the input to track changes in the impairments; and changing channel parameters to improve throughput on the channel based on the changes in the impairments. Other systems and methods are disclosed.

A method of transmitting information over a feed back channel of a communication system that has multiple antenna systems is provided. Long term channel condition information is obtained from received measured and / or calculated channel parameter values. The obtained long term channel condition information is arranged in a particular manner and transmitted over a defined time period during which the long term channel condition information varies relatively slowly. Because the long term information remains relatively constant for one or more defined time periods, the amount of bandwidth needed to communicate this value is small because it need only be communicated occasionally. Thus only a small bandwidth needs to be allocated for transmitting this long term information.

A method and system for blind channel estimation comprises acquiring two mixtures of at least one at least weakly W-disjoint orthogonal source signal, calculating point-by-point ratios of a transform of a time-window of each of said mixture signals, determining channel parameter estimates from said ratios, constructing a histogram of said channel parameter estimates, repeating the calculating, determining and constructing steps for successive time windows of the mixture signals, and selecting as estimates of said channel parameters those estimates associated with identified peaks on said histogram.

A MIMO method based on distributed transmission sources for transmitting a downlink data stream between M transmitting antennas and a mobile terminal having P receiving antennas, M and P>1, channels from at least two transmitting antennas to one of receiving antennas have different multipath distributions, said method comprises transmitting corresponding M substreams to the mobile terminal by using the same spreading code; estimating the multipath channel matrix; and processing the signal according to the multipath channel matrix to restore the downlink data stream, the estimating including measuring the total number of actual multipath received components having different delays in the transmitted signals; constructing the multipath channel matrix by taking the number as the multipath number, so that if the signal transmitted by one of the transmitting antennas to the receiving antenna has no multipath component corresponding to one of the delays, the channel parameter corresponding to the transmitting antenna, the receiving antenna and the delay is set as 0, the transmitting comprises adjusting the gain of said M sub-data streams based on the average signal quality measurement of uplink signals from the mobile terminal to said M transmitting antennas, so that average path losses of respective downlink channels are substantially equal.

The method comprises: setting up a program recommendation list comprising the program name parameter, channel parameter, play time parameter and loving grade parameter. Said program name parameter is used for saving the program name; the channel parameter is used for saving the play channel corresponding to the relevant program; the play time parameter is used for saving the play time of relevant program; the loving grade parameter is used for saving the loving grade of user for the relevant program; starting up the program recommendation to search the program whose play time matches the current moment program; recommending the matched program to users according to a sequence of loving grade.

A method of selectively providing MIMO transmission / reception in a WLAN system includes using a TSPEC reservation and signaling mechanism to instantiate and tear down, dynamically, multi-channel operation in a WLAN; providing an inference algorithm to determine the minimum number of channels required to establish a TSPEC using a MIMO WLAN system; providing specific channel parameters as parameters to be negotiated in the TSPEC; providing frame exchange sequences to be used in Enhanced Distributed Coordinated Access contention based access and to be used in polled access; and providing a mechanism wherein an access point makes a decision as to whether to admit MIMO functionality on a given link, wherein a “link” is a set of communications between two specific WLAN stations.

A method and apparatus for establishing a radio bearer of a point-to-multipoint multimedia service by utilizing a reference configuration of radio bearer parameters for quickly establising a radio bearer when a mobile terminal moves between cells. By configuring radio bearer parameters for a specific point-to-multipoint service by utilizing a reference configuration such that the same, or equal value, protocol and channel parameters are set for each cell, different cells in a communication system in which a specific point-to-point service is provided are able to configure the radio protocol entities, channels, and radio bearer at the same time by utilizing the same parameter values, thereby minimizing delay in establishing a radio bearer and minimizing data loss occurring during handover, conserving network resources, and enhancing reception performance via soft combining.

A method of estimating a signal-to-noise ratio by considering user mobility, a method of adjusting feedback information transmission, an adaptive modulation and coding method using the same, and a transceiver thereof are disclosed. The present invention includes measuring a first channel parameter and a second channel parameter using first and second symbols sequentially received, respectively, estimating a channel quality considering a time delay between measurements of the first and second channel parameters using the first and second channel parameters, and transmitting information for the estimated channel quality if a variation of the first and second channel parameters is equal to or greater than a prescribed threshold. Accordingly, the present invention reduces performance degradation and feedback overhead caused by a time delay in channel quality estimation.

The present invention relates to a method for improved and efficient usage of radio network resources with regard to the transmission properties of applied communication channel types and total network load by means of using early indications on the uplink or downlink of requests to establish new communication connection or adjust parameter settings of already existing connections regading the expectable amount of additional traffic due to such a connection. Early indications are, e.g., information on protocol type, the kind of requested communication service, the profile of the user equipment that has sent the request, or traffic history. In response to such indications the inventive method can forward, e.g., an uplink request and at the same time initiate a channel type switching providing appropriate channel parameter settings or adjustments. In case of congestion control it is another possibility to delay or even suppress uplink requests.

The invention relates to a synchronization and channel response estimation method which is applicable to an OFDM system, the technical proposal is as follows: a maximum likelihood criterion ML-based cost function for the symbol timing synchronization, the carrier frequency synchronization and the channel parameter joint estimation is proposed by using an OFDM system model under a frequency selective fading channel and against the requirements on the accuracy of the transmission of high-quality information of the next generation of wireless communication system and the existing OFDM wireless communication system. A system architecture and a strategy of joint estimation symbols of timing offset Theta, carrier frequency offset Epsilon and channel impulse response h are derived from the cost function. The method comprises the following steps of carrying out the coarse synchronization and the channel response estimation and carrying out the fine synchronization and the calculation of a channel estimated value. The method can realize the balance between the calculation precision and the calculation complexity, increase or reduce the times of the iteration of the fine synchronization according to an actual system, reduce the interference during the wireless transmission, further improve the reliability of the system and improve the availability of the system.

A technique for providing an announcement in a communications network includes setting up a first level communication session in a first network element of the network. A determination is then made that an announcement is to be played to the first network element. An identity of a second network element which is to play the announcement on the first communication session is then sent and after a second level communication session is set up, the second level communication channel parameters are modified in accordance with the transmitted identity. The second network element then plays the announcement to the first network element. The transmitted identity may include an IP address or a port number or a TA. The communication session may include a PDP context. The first network element may include a Mobile Station.

A method of dynamically allocating RF communication channels to a wireless communication device (102). A plurality of dynamic spectrum allocation (DSA) channels (222, 224) can be identified. The DSA channels can be channels that are available to a non-incumbent user to be used for RF communications. Based on at least one required channel parameter, a DSA channel can be selected as a first channel to allocate to the wireless communication device. At least a second channel can be selected to allocate to the wireless communication device based on a spectral relationship between the first channel and the second channel to ensure that the first and second channels are separated by at least a minimum required frequency separation (216).

The invention provides a multi-channel SDK (software development kit) access system for mobile terminal software. The system comprises a central control board, a universal SDK, a CP (computer program) interface module, a third-party SDK, a channel interface module, a channel parameter configuring and file packaging module and a file management module. The universal SDK is used for storing an SDK universal to multiple different channels. The CP interface module provides a system access interface for at least one CP and is used for file downloading or uploading or configuring of the CPs. The third-party SDK is used for storing respective SDKs provided by different channel providers. The channel interface module provides a system access interface to at least one channel providers and is used for acquiring SDKs of different channels and uploading files generated by the channel parameter configuring and file packaging module to each channel. The channel parameter configuring and file packaging module is used for receiving configuration provided by the CPs, and configuring and packaging programs, developed on the basis of the universal SDK, uploaded by the CPs according to the CP configuration and the third-party SDK so as to enable the programs to access to different channels.

A method for assigning channels in a wireless network includes receiving from each of a plurality of a first type of wireless components a total average data rate. Each total average data rate is based on an average data rate for each of a first plurality of a second type of wireless components coupled to the respective first type of wireless component. The method also includes determining at least one channel parameter for a first wireless component of the plurality of the first type of wireless components based on a ratio of the total average data rate associated with the respective first wireless component to the total average data rate associated with the plurality of the first type of wireless components. The method further includes allocating a channel to the first wireless component based on the determined at least one channel parameter.

The invention discloses a signal acquisition system and a signal acquisition method for a satellite navigation receiver so as to realize compatible processing of a plurality of GNSS satellite signals. The system comprises a channel parameter control list, a data storage, a digital down-conversion and down-sampling module, and a related energy accumulation and signal acquisition module, wherein the channel parameter control list stores control parameters and state parameters of a plurality of logical channels; the data storage stores intermediate-frequency sample data of satellite signals received by the receiver according to the control parameters; the digital down-conversion and down-sampling module performs digital down-conversion and down-sampling operation on the intermediate-frequency sample data according to the control parameters and the state parameters to acquire satellite sample data with zero intermediate frequency and low sample rate; and the related energy accumulation and signal acquisition module completes satellite signal despread, related energy accumulation, and signal acquisition and output according to the control parameters and the state parameters.

Apparatus and methods are disclosed for improving wireless and other network communications, e.g., through improving resource utilization, which may comprise the steps of accumulating channel modeling information relating to channel performance; calculating a channel parameter threshold based on the accumulated channel modeling information, whereby the channel parameter, as measured, being above the threshold indicates the channel is a good channel; adjusting traffic over a selected good channel to improve performance of the network or a network resource. The network resource may comprises battery life for devices operating on the network, data rate for devices operating on the network, constituting or reconstituting ad hoc networks comprising nodes separated by multiple hops, continuity of connectivity within a single communication link over the network, etc. The apparatus and method of operating the apparatus may also comprise dynamically performing the adjusting step resulting from repeating the calculating step over time.

A method is provided for automatically improving throughput of an active channel in a communication system comprising: receiving input from one or more modules that identify and characterize impairments in the active channel; monitoring the input to track changes in the impairments; and changing channel parameters to improve throughput on the channel based on the changes in the impairments. Other systems and methods are disclosed.

As a result of transmitting a low-density parity-check (LDPC) codeword (b) having a number (N) of codeword bits consisting of K information bits and N parity bits, for the received An LDPC decoder for decoding a codeword (Y), comprising: a memory for receiving codeword bits of a noisy codeword (Y), storing the codeword bits from the received noisy codeword (Y) and from The a priori estimate (Qv) of the predetermined value of the predetermined parameter of the communication channel; the generalized check node processing unit, iteratively calculates the messages on the edge of the bipartite graph according to the serial scheduling, and in each iteration, the check for the bipartite graph Node (C), all adjacent variable nodes (V) connected to the check node (C), calculate the input message (Qvc) from the adjacent variable node (V) to the check node (C) and from Output message (RCV) from a check node (C) to a neighboring variable node (V).

An optical network monitor and a method for monitoring the optical signals of an optical network including a spectrograph that includes a detector array, a processor and outputs. The network monitor receives an optical input signal which includes individual channels. The optical signal is transmitted onto the spectrograph which disperses the optical signal into the individual channels. The individual channels are directed onto the detector array so that the channels are spaced across the detector array. The detector array detects the channels in parallel and transmits to the processor channel parameter data which is processes the parameter data through internal algorithms to produce the outputs.

The invention provides a calculation unloading and resource allocation method and device based on deep reinforcement learning, and the method comprises the steps: calculating the total calculation resources of an MEC server based on the calculation task parameters of UE, the performance parameters of the UE, the channel parameters between the UE and an AP, and the mobile edge, and constructing anoptimization problem model; and determining the optimal solution of the optimization problem model based on deep reinforcement learning, determining the unloading decision of the UE, and respectivelyallocating the percentage of the computing resources and the percentage of the spectrum resources to the UE. According to the calculation unloading and resource allocation method and device based on deep reinforcement learning provided by the invention, the actual calculation unloading and resource allocation characteristics in the time-varying MEC system are considered, the time delay threshold of the task and the limited resource capacity constraint of the system are based on deep reinforcement learning, the DNN is used for effectively approximating a value function in reinforcement learningso as to determine a joint optimal scheme of calculation unloading and resource allocation, and the energy consumption of the UE is further reduced.

A method for iterative estimation of a set of unknown channel parameters in a beamforming network including determining a first order estimate of offsets at measurement nodes and an estimate of the confidence in the initial estimate of the measurement nodes' offsets, and iterating, until a desired estimation accuracy is obtained, determining an improved estimate of a parameter set, and the confidence in the estimates, using the prior estimate of the offsets at the measurement nodes and determining an improved estimate of the offsets at the measurement nodes and the associated confidence values using the prior estimate of the parameter set and the corresponding confidence values.

A channel type switching method for MBMS P-t-P channel and P-t-M channel comprises following steps when UE moves to a cell in DRNC and Iur interface exists: DRNC decides to perform switching between common channel and dedicated channel; DRNC notifies SRNC of MBMS channel type and common channel parameters. This invention solves the problem of MBMS channel switching process when UTE moves to a cell in DRNC and UE is receiving MBMS service under the situation that SRNC doesn't re-position while and MBMS channel type or parameter changes; it also solves the problem of MBMS channel type switching process caused by other users' movements or new services' joining in while UE doesn't move, connects with SRNC via DRNC and has on-going MBMS service.

The invention discloses a high dynamic satellite channel simulator, belonging to the field of satellite communications. The satellite channel simulator comprises a channel parameter generation unit, a channel simulation unit and a radio frequency unit. The whole system has the following working principle: a computer operates satellite channel simulation software, a satellite channel model, a communication frequency point, orbit parameters, terminal parameters and environmental parameters are configured, and a simulation program is started after configuration is completed. In the operating process of the simulation program, generated channel parameters are transmitted to the satellite channel simulation unit via the Ethernet network, the simulation unit loads the satellite channel parameters to a signal sent by a satellite communication device, the realization of channel simulation is completed, and finally, the radio frequency unit modulates the signal to radio frequency. The invention has the main goal of accurately and timely simulating a satellite channel under laboratory conditions, and a channel simulator with controlled cost and strong operability is provided for the development of the satellite communication device.

The present invention relates to link adaptation in wireless communication, and in particular though not exclusively to wireless local area networks (WLAN). The present invention provides a link adaptation system for communication systems using multiple but separate transmission parameter options. This equates to a “double list” approach compared with the known “single list” approach. The data can be transmitted according to two or more series of predetermined transmission modes, each mode series having a common base transmission parameter such as its space time coding, and one or more rate transmission parameters such as modulation or channel coding rate. Examples of different space time coding include a more robust Alamouti ST code and a spatial multiplexing code such as BLAST. The base and rate transmission parameters can be changed independent of each other thus providing a “2D” adaptation path network of up-rating and down-rating paths. This arrangement provides great flexibility because no explicit, reliable or continuous estimation of certain channel parameters is needed (e.g. on SNR, interference, channel correlation, factors that can vary with time and is difficult to reliably estimate).