US 10,873,370 B2 · Method and system for enabling explicit channel state information (CSI) feedback in multiple-input-multiple-output (MIMO)

Abstract

Embodiments of the present disclosure discloses a method for enabling CSI feedback in Multiple Input Multiple Output (MIMO) wireless communication system comprising at least one user equipment (UE) and at least one base station (BS). The UE receives a plurality of downlink (DL) channel state information CSI from the BS and generate an explicit CSI from the received DL CSI. The UE determines a range of frequency domain values and channel state values from the received DL CSI. Upon determination, the UE performs IDFT to determine time domain channel impulse response matrices for the range of frequency domain values and perform CSI quantization. In another embodiment, the processor performs CSI quantization on either full range or a partial range of the time domain channel impulse response matrices to obtain optimized time domain channel explicit CSI and transmit the generated explicit CSI as a feedback to the one or more BS.

Claims26

Dependent claims

A method for enabling channel state information (CSI) feedback in Multiple Input Multiple Output (MIMO) wireless communication system, the method comprising:

receiving, by a user equipment (UE), a plurality of downlink (DL) reference signals from one or more base stations (BSs), wherein DL CSI is obtained from the DL reference signals;
generating, by the UE, an explicit CSI from the DL CSI, wherein generating the explicit CSI comprises performing CSI quantization on individual DL CSI matrices using at least one or more of a codebook and a set of precoder matrices;
and
transmitting, by the UE, the generated explicit CSI as a feedback to the one or more BSs, wherein the CSI feedback is transmitted to the one or more BSs corresponding to one or more frequency indices.

1 more element

A user equipment (UE) for enabling channel state information (CSI) feedback in Multiple Input Multiple Output (MIMO) wireless communication system, the UE comprising:

a processor;
a memory communicatively coupled to the processor;
and
at least one transceiver coupled to the processor and the memory, comprising at least one receiver and at least one transmitter;
wherein the processor is configured to:
receive, via the at least one receiver, one or more downlink (DL) reference signals from one or more base stations (BS) coupled with the UE, wherein DL CSI is obtained from the DL reference signals;
generate an explicit CSI from the received DL CSI by performing CSI quantization on individual DL CSI matrices using at least one or more of a codebook and a set of precoder matrices;
and
transmit, via the at least one transmitter, the generated explicit CSI as a feedback to the one or more BSs corresponding to one or more frequency indices.

6 more elements

Dependencies are inferred from the claim text.

Method and system for enabling explicit channel state information (CSI) feedback in multiple-input-multiple-output (MIMO)

Life of this patent

Method and system for enabling explicit channel state information (CSI) feedback in multiple-input-multiple-output (MIMO)

Life of this patent

Abstract

Claims26