Low complexity intercarrier interference (ICI) compensation algorithm: cyclic block phase tracking reference signal (PTRS) sequence design
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJung-Fu Cheng, Mehrnaz Afshang, Stephen Grant
Life of this patent
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Abstract
A method, system and apparatus for low complexity intercarrier interference (ICI) compensation algorithms and cyclic block phase tracking reference signal (PTRS) sequence design are disclosed. According to one aspect, a method in a network node includes generating a PTRS, having a PTRS sequence that is configured to lower a complexity of an ICI compensation algorithm. According to another aspect, a method in a wireless device (WD) includes determining an ICI compensation algorithm based at least in part on a PTRS having a PTRS sequence, and applying the determined ICI compensation algorithm to compensate for ICI.
Claims20
A method in a transmitter of one of a network node and a wireless device (WD), the method comprising:
- determining, for a receiver, a cyclic block phase tracking reference signal (PTRS) sequence by cyclically extending a base sequence;
- performing, based at least in part on the PTRS sequence, an inter-carrier interference (ICI) compensation algorithm of a specified level of complexity;
- and
- transmitting the PTRS.
A transmitter for one of a network node and a wireless device (WD), the transmitter comprising:
- processing circuitry configured to:
- determine, for a receiver, a cyclic block phase tracking reference signal, (PTRS) sequence by cyclically extending a base sequence;
- and
- perform, based at least in part on the PTRS sequence, an inter-carrier interference (ICI) compensation algorithm of a specified level of complexity;
- and
- a radio interface in communication with the processing circuitry and configured to transmit the PTRS.
A method in a receiver of one of a network node and a wireless device, WD, the method comprising:
- receiving a phase tracking reference signal (PTRS), having a PTRS sequence;
- determining intercarrier interference (ICI) compensation filter coefficients based at least in part on a circulant matrix of known PTRS sequences, a PTRS sequence being formed by cyclically extending a base sequence;
- and
- applying a filter having the determined ICI compensation filter coefficients to the received PTRS sequence.
A receiver for one of a network node and a wireless device (WD), the receiver comprising:
- a radio interface configured to receive a phase tracking reference signal (PTRS), and
- processing circuitry in communication with the radio interface and configured to:
- determine intercarrier interference (ICI) compensation filter coefficients based at least in part on a circulant matrix of known phase tracking reference signal (PTRS) sequences, a PTRS sequence being formed by cyclically extending a base sequence;
- and
- apply a filter having the determined ICI compensation filter coefficients to a received PTRS sequence.
Dependencies are inferred from the claim text.