Wireless repeater with fir based channel equalizer
AssigneeRF DSP Inc.
InventorsJunyang Shen, Ping Liang, Dengkui Zhu, Boyu Li
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Abstract
This invention presents a repeater enhanced MU-MIMO wireless communication system comprising a BS, a plural of repeaters, and a plural of UEs, where a repeater estimates the channel between itself and its upper communication node in the system, a repeater computes equalization coefficients based on the estimation of the channel coefficients, and a repeater applies the equalization coefficients to reduce the channel delay spread or increase the coherence bandwidth of the channel between communication nodes containing the BS, the UEs, or the repeaters.
Claims19
A MIMO wireless communication system comprising one or more BS, one or more repeaters, and one or more UEs, wherein a repeater estimates the channel between itself and its upper communication node in the system, computes an equalization filter or equalization coefficients based on the estimation of the channel, and applies the equalization filter to improve the condition of the communication channel containing the one or more repeaters.
The system in claimed 1 wherein improving the condition of the communication channel comprises increasing the coherence bandwidth of the communication channel.
The system in claimed 1 wherein improving the condition of the communication channel comprises reducing the delay spread of the communication channel.
The system in claimed 1 further comprising that a plural of repeaters are placed in the coverage of a BS so that they forms a network that may contain more than one layer of communication nodes, wherein each repeater receives signals from its upper nodes that is either a BS or one or more repeaters and transmits signals to the lower nodes that is either one or more repeaters or one or more UEs in the downlink transmission.
The system claimed in 1 further comprising that the equalization of the channel between two neighboring nodes is implemented by either the upper node or the lower node, which is predefined by the system or informed through control information.
A repeater for using in a MIMO wireless communication system comprising a module for estimating the channel between itself and its upper communication node in the system, a module for computing an equalization filter based on the estimation of the channel, and a module for applying the equalization filter to improve the condition of the communication channel containing the repeater, wherein the MIMO wireless communication system comprises one or more BS, one or more repeaters, and one or more UEs.
The repeater in claimed 17 wherein improving the condition of the communication channel comprises increasing the coherence bandwidth of the communication channel.
The repeater in claimed 17 wherein improving the condition of the communication channel comprises reducing the delay spread of the communication channel.
Dependencies are inferred from the claim text.