Invention Grant
- Patent Title: Multiple-input multiple-output system performance using advanced receivers for 5G or other next generation networks
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Application No.: US16865931Application Date: 2020-05-04
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Publication No.: US11356161B2Publication Date: 2022-06-07
- Inventor: SaiRamesh Nammi , Arunabha Ghosh
- Applicant: AT&T Intellectual Property I, L.P.
- Applicant Address: US GA Atlanta
- Assignee: AT&T Intellectual Property I, L.P.
- Current Assignee: AT&T Intellectual Property I, L.P.
- Current Assignee Address: US GA Atlanta
- Agency: Amin, Turocy & Watson, LLP
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04B7/08 ; H04L1/00 ; H04B17/336 ; H04L1/20

Abstract:
Fast calculation of channel state information using demodulation reference signals (DM-RS) is provided herein. The channel state information can be calculated by estimating the signal to noise ratio of a communication link based on the DM-RS, and then estimating the channel quality indicator based on the SINR. The advanced receivers can use list-based detection methods which the estimated SINR can improve the performance thereof. Channel state information is traditionally calculated based on the channel state reference signals (CS-RS). Demodulation reference signals, which are used for channel estimation for a data channel, are transmitted at different times than CS-RS however, and so some portions of the channel state information including layer indicator (LI) and channel quality indicator (CQI) can be calculated based on the demodulation reference signals, allowing a network to adapt more quickly to changing channel conditions, without having to transmit a CS-RS.
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