Patent
Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system
TLDR
In this article, one or more sets of terminals are formed for possible data transmission, with each set including a unique combination of one-or more terminals and corresponding to a hypothesis to be evaluated.Abstract:
Techniques to schedule downlink data transmission to a number of terminals in a wireless communication system. In one method, one or more sets of terminals are formed for possible data transmission, with each set including a unique combination of one or more terminals and corresponding to a hypothesis to be evaluated. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to specific assignments of a number of transmit antennas to the one or more terminals in the hypothesis. The performance of each sub-hypothesis is then evaluated, and one of the evaluated sub-hypotheses is selected based on their performance. The terminal(s) in the selected sub-hypothesis are then scheduled for data transmission, and data is thereafter coded, modulated, and transmitted to each scheduled terminal from one or more transmit antennas assigned to the terminal.read more
Citations
More filters
Patent
MIMO WLAN system
TL;DR: In this article, a multiple-access MIMO WLAN system that employs MIMI, OFDM, and TDD was proposed, which employs a channel structure with a number of configurable transport channels, supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities.
Patent
Resource allocation for MIMO-OFDM communication systems
TL;DR: In this paper, a scheduler forms one or more sets of terminals for possible (downlink or uplink) data transmission for each of a number of frequency bands, with each sub-hypotheses corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis (for the downlink) or (2) a specific order for processing the uplink data transmissions from the terminals(s).
Patent
System and method for distributed input-distributed output wireless communications
TL;DR: In this article, a method is described for transmitting a training signal from each antenna of a base station to each of a plurality of client devices, each of the client devices analyzing each training signal to generate channel characterization data, and transmitting the characterization data back to the base station.
Patent
Multiple-input multiple-output radio transceiver
TL;DR: In this paper, a MIMO radio transceiver is proposed to support processing of multiple signals for simultaneous transmission via corresponding ones of a plurality of antennas and to support receive processing of the multiple signals detected by corresponding ones.
Patent
MIMO system with multiple spatial multiplexing modes
TL;DR: In this article, a MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility, which may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a multi-user non-steered mode that transmissions from multiple antennas to multiple receivers without spatial processing at a transmitter, and (3) a multiuser steered and non-stacked mode that simultaneously transmits data streams from multiple receivers to multiple users.
References
More filters
Patent
Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
TL;DR: A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell-site using code division multiple access spread spectrum communication signals is described in this paper.
Patent
Method and apparatus for high-rate packet data transmission
Roberto Padovani,Bender Paul E,Peter J. Black,Matthew S. Grob,Hinderling Jurg K,Nagabhushana T. Sindhushayana,Wheatley Charles E +6 more
TL;DR: In this article, the data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packet, which results in retransmission of the received in error.
Journal ArticleDOI
Antenna selection for spatial multiplexing systems with linear receivers
TL;DR: A criterion for selecting the optimal antenna subset when linear, coherent receivers are used over a slowly varying channel and use of the post-processing SNRs of the multiplexed streams whereby the antenna subset that induces the largest minimum SNR is chosen.
Patent
Multiple-access multiple-input multiple-output (MIMO) communication system
TL;DR: In this article, the authors provide techniques to achieve better utilization of the available resources and robust performance for the downlink and uplink in a multiple-access MIMO system.
Patent
Method and apparatus for optimization of wireless multipoint electromagnetic communication networks
TL;DR: In this paper, the authors exploit the substantive reciprocity of internode channel responses through dynamic, adaptive modification of receive and transmit weights, enabling locally enabled global optimization of a multipoint, wireless electromagnetic communications network of communication nodes.