92results about How to "Improve wireless communication performance" patented technology

Techniques for location-assisted wireless communication use real-time location(s) of wireless transceiver(s) together with stored location-indexed channel information to improve communication over a wireless channel between the transceiver(s). The stored channel information includes channel characteristics (e.g., average power, angle-of-arrival, and time delay of multipath components) that are substantially constant in time but vary gradually as a function of location. Current transceiver location(s) are obtained and used to retrieve stored channel characteristics corresponding to the location(s). The channel information may be used at either or both transceiver(s) to improve reception and/or transmission of signals propagating over the wireless channel. For example, reception may be improved by using path angle information to perform spatially structured reception, or using path delay information to perform temporally structured reception, e.g., to assign fingers to multipath components in a RAKE receiver and/or to track time delays of multipath components.

The present application discloses, inter alia, a system for improving the aggregate throughput of a wireless local area network which includes: at least one access point that is equipped with at least one transceiver configured to simultaneously transmit and receive at multiple frequencies using multiple channels; and the access point being configured to acquire channel conditions of users and to pool sets of users on the channels based on the channel conditions.

System and method for enhancing performance of a wireless communication system, including communicating between an access point and at least one close client over a first RF channel, and communicating between an access point and at least one remote client via a repeater. The communication between the access point and the at least one remote client via the repeater includes communicating between an access point and the repeater over the first RF channel and communicating between the repeater and the at least one remote client over a second RF channel. The communication between the access point and the at least one close client over the first RF channel is substantially contemporaneous with the communication between the repeater and the at least one remote client over the second RF channel.

Provided are a method and apparatus for radio resource allocation. The radio resource allocation method for a base station may include: obtaining at least one of beamforming structure information and frame structure information; generating resource allocation information for a CSI-RS (channel state information reference signal) on the basis of at least one of the beamforming structure information and the frame structure information; and transmitting the resource allocation information. As a result, it is possible to efficiently perform resource allocation.

A system and method for enhancing the performance of a wireless communication system are disclosed. For example, a method for enhancing the performance of a wireless communication system is disclosed, which includes the steps of receiving a signal including a first plurality of sub-bands, calculating a plurality of channel quality values, each channel quality value associated with a respective sub-band of the first plurality of sub-bands, conveying the plurality of channel quality values to a processing unit associated with a transmitter unit that transmitted the signal, determining the highest channel quality value from the conveyed plurality of channel quality values, determining a cyclic delay value associated with the highest channel quality value, and applying the cyclic delay value to a second plurality of sub-bands.

A method is disclosed for determining when a request for a higher transmission rate should be granted to a mobile station that currently has access to a communication system to facilitate the maintenance of a performance target (quality of service level) of the reverse link. The method for determining when a mobile station can have access to a higher transmission rate includes obtaining first and second estimated performance indicators for a reverse link of the base station that a mobile station is currently accessing. A blocking threshold value is established. Access at the requested higher transmission rate is based on a comparison of the first and second indicators relative to the established blocking threshold value. If access is denied at the requested higher rate, access will be granted at the next lower rate which will not degrade the performance of the wireless communication system.

A wireless communication system, and more particularly, a base station apparatus to lend an idle resource to another base station or to borrow an idle resource from another base station is provided. A borrowing base station apparatus includes a transmitter to transmit an idle resource borrowing message to a lending base station, and a receiver to receive, from the lending base station in response to the idle resource borrowing message, an idle resource lending message including information regarding whether to lend an idle resource of the lending base station, such that the transmitter transmits data to a terminal using the idle resource. The borrowing base station may borrow an idle resource from the lending base station to use the borrowed idle resource to perform data transmission.

A method of controlling interference in a wireless communication system is disclosed. A method for controlling interference by a transmitter of a wireless communication system with multiple antennas comprises generating a base codebook subset including at least one precoding matrix selected from a base codebook; transmitting a base codebook subset indication, which represents the at least one precoding matrix included in the base codebook subset, to a receiver; and precoding data using the base codebook subset or the base codebook.

The invention discloses a vehicle-mounted information system with the functions of video shooting, data interaction, projection display and navigation, and the vehicle-mounted information system is realized based on a WIFI (Wireless Fidelity) technology. The vehicle-mounted information system comprises an image capture module and a central control terminal, wherein the image capture module is used for recording images in a traveling process in real time and is connected with the central control terminal through a video signal line; and the central control terminal comprises a display connection module, a processor, an audio module, a decoding/coding module, a storage device, a WIFI module and a head-up display module and is used for being connected with intelligent terminals, such as a smart mobile phone, a tablet personal computer and the like through the WIFI, and executing the transmission, cloud backup and remote control of multimedia data. According to the vehicle-mounted information system with the functions of video shooting, data interaction, projection display and navigation, various functions of the traditional vehicle-mounted equipment are organically integrated, and the functions, such as wireless data transmission, remote real-time control, cloud storage, projection display and the like, are additionally provided.

Provided is a watch-type terminal including: a main body that includes an antenna module which transmits and receives a wireless signal in a predetermined frequency band; a band that extends from the main body and that is formed in such a manner that the main body is removably worn on a wrist; a ground portion that includes first and second metal members that extend to have different lengths; a sensing unit that detects whether or not the main body is worn on the wrist; and a controller that grounds the antenna module to at least one of the first and second metal members, based on whether or not the main body is worn on the wrist.

Each receiving node (120) of a plurality of receiving nodes (120-1, 120-2 and 120-3) in a wireless network converts a superposition of signals received from a plurality of transmitting nodes (10) to produce soft complex signal information. The soft complex signal information associated with the considered plurality of receiving nodes are collected, and jointly detect signal information transmitted from at least a subset of the plurality of transmitting nodes (10) based on the collected soft complex signal information. The collected soft signal information generally retains phase and amplitude information, and the transmitted signals are preferably detected in a joint detection process based on a complex channel representation and collected soft signal information.

A radio access node serves the communication terminal in at least one of a first cell on a carrier of a licensed or unlicensed spectrum, and/or a second cell on a carrier of an unlicensed spectrum. The radio access node determines whether a Listen Before Talk, LBT, process is to be performed or not in the second cell. The radio access node schedules, based on whether the LBT process is to be performed in a subframe on the second cell or not, a control channel and/or a data channel with a start position in the subframe out of at least two start positions. The radio access node transmits control information on the control channel and/or data on the data channel as scheduled to the communication terminal.

Provided is a method for reporting by a terminal in a wireless communication system. The method comprises: receiving positioning-limiting information from a network; and determining whether to allow positioning on the basis of the positioning limiting information. The method additionally comprises, if the positioning is allowed, acquiring location information by means of positioning, and reporting the location information via a network.

Disclosed herein is a multiple-input multiple-output (MIMO) wireless communication apparatus including: a plurality of radio frequency (RF) modules each processing RF signals input; a plurality of local area communication modules processing a local area communication signal input; a plurality of switches; and a control block determining whether there is an idle RF module in the plurality of RF modules at the time of the MIMO mode operation and switching a corresponding switch so that the local area communication module operating in the MIMO mode and a corresponding RF antenna corresponding to the idle RF module are connected to each other. Therefore, the MIMO mode is implemented without adding the local area communication dedicated antenna, thereby making it possible to maximize space utilization and reduce a cost.

Disclosed herein are a signal-multiplexing apparatus and method based on machine learning. The signal-multiplexing method based on machine learning, performed by a signal-multiplexing apparatus based on machine learning, including training a transmitted signal using a machine-learning technique, performing complex mapping to transmit the transmitted signal as multiple signals, receiving the multiple signals and regularizing the multiple signals based on a preset rule corresponding to the machine-learning technique, outputting an estimated value for the transmitted signal by training regularized multiple signals using the machine-learning technique, calculating a difference between the transmitted signal and the estimated value for the transmitted signal, and detecting the transmitted signal from an output value when the difference is less than or equal to a preset value.

The X-ray detector includes a side frame; a cover coupled to an outside of the side frame; a first antenna radiator supplied with a power by being coupled to the side frame; and a second antenna radiator provided in the cover while being spaced apart from the first antenna radiator, and configured to resonate with the first antenna radiator.

Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughput.