Reference signal design with Zadoff-Chu sequences
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsXingqin Lin, Ansuman Adhikary, Ali S. Khayrallah, Havish Koorapaty, Yi-Pin Eric Wang
Life of this patent
Estimating the term…
Abstract
Provided are methods (400) of estimating a time delay and/or a frequency shift of a reference signal. Such methods include receiving (405) a first reference signal that is generated using a first Zadoff-Chu (ZC) sequence, receiving (410) a second reference signal that is generated using a second ZC sequence that is different than the first ZC sequence, and processing (415) the first reference signal and the second reference signal to estimate at least one of the time delay and the frequency shift of the first reference signal and/or the second reference signal.
Claims20
A method of estimating a time delay and/or a frequency shift of a reference signal, the method comprising:
- receiving a first reference signal that is generated using a first Zadoff-Chu (ZC) sequence;
- receiving a second reference signal that is generated using a second ZC sequence that is different than the first ZC sequence;
- and
- processing the first reference signal and the second reference signal to estimate at least one of the time delay and the frequency shift of the first reference signal and/or the second reference signal, wherein processing the received first and second reference signals includes:
- correlating the received first reference signal with a local copy of the first reference signal to generate a first set of correlation results;
- correlating the received second reference signal with a local copy of the second reference signal to generate a second set of correlation results;
- detecting a first correlation peak in the first set of correlation results;
- detecting a second correlation peak in the second set of correlation results;
- and
- estimating at least one of the time delay and the frequency shift of at least one of the reference signals using the detected first and second correlation peaks.
A radio communication network comprising:
- a first radio node that comprises:
- a transceiver to provide wireless communication over a radio interface;
- at least one processor coupled to the transceiver;
- and
- at least one memory coupled to the at least one processor and storing program code that when executed by the at least one processor causes the at least one processor to perform operations comprising:
- receiving, via the transceiver, a first reference signal that is generated using a first Zadoff-Chu (ZC) sequence,
- receiving, via the transceiver, a second reference signal that is generated using a second ZC sequence that is different than the first ZC sequence, and
- processing the first reference signal and the second reference signal to estimate at least one of the time delay and the frequency shift of the first reference signal and/or the second reference signal;
- and
- a second radio node that is configured to generate the first and second signals and to transmit the first and second reference signals to the first radio node.
A wireless communication device (UE) comprising:
- a transceiver to provide wireless communication over a radio interface;
- at least one processor coupled to the transceiver;
- and
- at least one memory coupled to the at least one processor and storing program code that when executed by the at least one processor causes the at least one processor to perform operations comprising:
- receiving a first reference signal that is generated using a first Zadoff-Chu (ZC) sequence;
- receiving a second reference signal that is generated using a second ZC sequence that is different than the first ZC sequence;
- and
- processing the first reference signal and the second reference signal to estimate at least one of the time delay and the frequency shift of the first reference signal and/or the second reference signal.
A method of estimating a time delay and/or a frequency shift of a reference signal, the method comprising:
- generating a first reference signal using a first Zadoff-Chu (ZC) sequence;
- generating a second reference signal using a second ZC sequence that is different than the first ZC sequence;
- multiplexing the first and second reference signals before transmitting the first and second reference signals;
- and
- transmitting the multiplexed first and second reference signals to a radio node that is configured to process the first reference signal and the second reference signal to estimate at least one of the time delay and the frequency shift of the first reference signal and/or the second reference signal.
Dependencies are inferred from the claim text.