Patent
Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel
TLDR
In this paper, a multiple-stream, multiple-antenna receiver measures a composite channel between a multipleantenna transmitter and a multiple antenna receiver to produce a composite frequency measurement, where each antenna array weight set is associated with one of multiple data streams.Abstract:
The present invention makes it possible to increase a data rate between a transmitter and receiver using a multiple-input, multiple-output radio frequency channel. A multiple-stream, multiple-antenna receiver measures a composite channel between a multiple-antenna transmitter and a multiple-antenna receiver to produce a composite channel measurement. The receiver selects a plurality of antenna array weight sets for use in the multiple-antenna transmitter in response to the composite channel measurement, where each antenna array weight set is associated with one of multiple data streams. Information describing the plurality of antenna array weight sets for use in the multiple-antenna transmitter are then transmitted.read more
Citations
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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
Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion
TL;DR: In this paper, the authors proposed a pre-weighting scheme to match the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme.
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.
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Intelligent backhaul radio and antenna system
TL;DR: In this paper, a backhaul radio has an advanced antenna system for use in PTP or PMP topologies, which provides a significant diversity benefit, including increased transmitter to receiver isolation, adaptive polarization and MIMO transmission equalization.
Patent
Pilots for mimo communication systems
TL;DR: In this article, the various types of pilot include beacon pilot, MIMO pilot, carrier pilot, steered reference or steered pilot, and steered reference may be used for channel estimation.
References
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Journal ArticleDOI
Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas
TL;DR: This paper addresses digital communication in a Rayleigh fading environment when the channel characteristic is unknown at the transmitter but is known (tracked) at the receiver with the aim of leveraging the already highly developed 1-D codec technology.
Patent
Devices for transmitter path weights and methods therefor
TL;DR: In this article, a reference signal is transmitted through at least one of the antennas of an antenna array of a transmitting communication device, and the receiving communication device determines a weight to be associated with the antennas, and transmits weight information to the transmitting device.
Patent
Method and radio system for digital signal transmission
Ari Hottinen,Risto Wichman +1 more
TL;DR: In this article, the authors present a radio system for transmitting a digital signal that consists of the following steps: (1) the transmitter transmits at least a part of the signal via at least two different transmit antenna paths; (2) the receiver receives the signal; (3) the transmit power of the signals to be transmitted via the different transmission antenna paths with respect to one another by means of changeable weighting coefficients determined for each transmit antenna path; (4)
Patent
Method and system for transmitting and demodulating a communications signal using an adaptive antenna array in a wireless communication system
TL;DR: In this article, a transceiver for transmitting a communication signal from an antenna array in a wireless communications system, a different element pilot is transmitted from a plurality of antenna elements in the antenna array, and transmitter control data based upon measured characteristics of the element pilots as measured at a subscriber unit is received at the transceiver.
Patent
Diversity transmission means with phase adjustment depending upon a feedback signal supplied to the transmitter by the receiver
TL;DR: In this article, the first and second downlink transmission signals are derived from the same basic downlink signal which is to be transmitted to the receiver, and the receiver generates a feedback signal based on the received signals without processing those received signals separately from one another.