Time of arrival (TOA) estimation for positioning in a wireless communication network

US9037155B2 · kind B2 · utility

Inventors

• Sven Fischer · Leipzig, DE
• Muhammad Awais Amin · Nuremberg, DE
• Douglas Neal Rowitch · Del Mar, US
• Avneesh Agrawal · San Diego, US
• Raja Sekhar Bachu · Waukegan, US
• Ashwin Sampath · Skillman, US

Key dates

• Filing date: Oct 26, 2009
• Grant date: May 19, 2015
• Expiry date: Jan 31, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S5/0236
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Techniques for determining time of arrivals (TOAs) of signals in a wireless communication network are described. Each cell may transmit (i) synchronization signals on a set of contiguous subcarriers in the center portion of the system bandwidth and (ii) reference signals on different sets of non-contiguous subcarriers distributed across the system bandwidth. A UE may determine TOA for a cell based on multiple signals transmitted on different sets of subcarriers. The UE may perform correlation for a first signal (e.g., a synchronization signal) from the cell to obtain first correlation results for different time offsets. The UE may perform correlation for a second signal (e.g., a reference signal) from the cell to obtain second correlation results for different time offsets. The UE may combine the first and second correlation results and may determine the TOA for the cell based on the combined correlation results.