Invention Grant
- Patent Title: Phase tracking reference signal (PTRS) for random access
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Application No.: US17654715Application Date: 2022-03-14
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Publication No.: US12232178B2Publication Date: 2025-02-18
- Inventor: Mahmoud Taherzadeh Boroujeni , Tao Luo , Junyi Li
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Arun Swain
- Main IPC: H04W74/0833
- IPC: H04W74/0833 ; H04L5/00

Abstract:
This disclosure provides systems, methods, and apparatuses for a wireless node to receive a phase tracking reference signal (PTRS) transmitted inside a downlink random access channel (RACH) message. The wireless node may receive a downlink RACH message that includes a PTRS based on an indication received in a downlink RACH message or a physical downlink control channel (PDCCH) associated with a downlink RACH message. In some aspects, the wireless node may utilize the PTRS for phase error correction or frequency error correction (such as frequency error caused by Doppler effects). This disclosure also provides systems, methods, and apparatuses for a component of a base station to provide an indication that a PTRS is included in a downlink RACH message. The indication may be provided in a downlink RACH message or a PDCCH associated with a downlink RACH message.
Public/Granted literature
- US20220353918A1 PHASE TRACKING REFERENCE SIGNAL (PTRS) FOR RANDOM ACCESS Public/Granted day:2022-11-03
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