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US 2024/0406050 A1Published application
System and method for carrier frequency offset estimation
OwnerAhmad Mustafa Musa Abu Al Haija, Mohammadhadi Balighinventors
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Abstract
The application provides a system and method for CFO estimation based on two (or more) sequences that are separate in time. Each sequence consists of two combined sequences. A combination of coarse estimation followed by fine estimation is used. Options are provided to include the transmission of the two sequences within a structure consistent with previous SSB block formats for one or both initial and non-initial access processes.
Claims20
A method comprising:
- obtaining a first combined synchronization sequence based on a base sequence and a first cover code;
- obtaining a second combined synchronization sequence based on the base sequence with a second cover code;
- and
- transmitting the first combined synchronization sequence as part of a first orthogonal frequency division multiplexing (OFDM) symbol and transmitting the second combined synchronization sequence as part of a second OFDM symbol.
1 more element
A network element comprising:
- at least one processor;
- and
- at least one computer-readable medium having computer executable instructions stored thereon that, when executed by the at least one processor, cause the network element to:
- obtain a first combined synchronization sequence based on a base sequence and a first cover code;
- obtain a second combined synchronization sequence based on the base sequence with a second cover code;
- and
- transmit the first combined synchronization sequence as part of a first orthogonal frequency division multiplexing (OFDM) symbol and transmitting the second combined synchronization sequence as part of a second OFDM symbol.
4 more elements
A method comprising:
- receiving a signal containing a first combined synchronization sequence (CSS) in a first orthogonal frequency division multiplexing (OFDM) symbol and a second CSS in a second OFDM symbol, wherein the first CSS is formed by a base sequence and a first cover code, and the second CSS is formed by the base sequence and a second cover code;
- obtaining a first carrier frequency offset (CFO) estimate obtained as a function of one of or both of the first CSS and the second CSS;
- obtaining a second CFO estimate based on the first CSS and the second CSS, using a coarse CFO estimate to select between multiple possible values for a fine CFO estimate, wherein the second CFO estimate is more precise than the first CFO estimate;
- and
- compensating for the CFO and detecting further information.
2 more elements
An apparatus comprising:
- at least one processor;
- and
- at least one computer-readable medium having computer executable instructions stored thereon that, when executed by the at least one processor, cause the apparatus to:
- receive a signal containing a first combined synchronization sequence (CSS) in a first orthogonal frequency division multiplexing (OFDM) symbol and a second CSS in a second OFDM symbol, wherein the first CSS is formed by a base sequence and a first cover code, and the second CSS is formed by the base sequence and a second cover code;
- obtain a first carrier frequency offset (CFO) estimate obtained as a function of one of or both of the first CSS and the second CSS;
- obtain a second CFO estimate based on the first CSS and the second CSS, using a coarse CFO estimate to select between multiple possible values for a fine CFO estimate, wherein the second CFO estimate is more precise than the first CFO estimate;
- and
- compensate for the CFO and detecting further information.
5 more elements
Dependencies are inferred from the claim text.