Method and device for channel prediction in wireless communication systems
AssigneeNEC Corporation
InventorsPrakash Chaki, Jun Shikida, Kazushi Muraoka, Takanobu Doi
Life of this patent
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Abstract
A communication device includes: a wireless transceiver configured to communicate with another communication device through a wireless channel; and at least one processor configured to execute instructions to: a) estimate at least one first channel response of the wireless channel based on a predetermined signal received from the another communication device; and b) predict a second channel response based on the at least one first channel response by an extrapolation method for signal transmission to the another communication device at a time instant where no channel estimation is performed.
Claims18
A communication device in a multi-antenna wireless communication system, comprising:
- a multi-antenna wireless transceiver configured to communicate with another communication device through a wireless channel;
- and
- at least one processor configured to execute instructions to:
- a) estimate at least one first channel response of the wireless channel based on a predetermined signal received from the another communication device;
- and
- b) predict a second channel response based on the at least one first channel response by an extrapolation method for signal transmission to the another communication device at a time instant where no channel estimation is performed,
- wherein in the b), the second channel response is predicted by:
- b.1) transforming the at least one first channel response by at least one first transformation to generate at least one first intermediate channel response;
- b.2) extrapolating the at least one first intermediate channel response to obtain at least one second intermediate channel response by the extrapolation method;
- and
- b.3) transforming the at least one second intermediate channel response by at least one second transformation to generate the second channel response,
- wherein the at least one first transformation performs at least one of transformations:
- b.1.1) from frequency domain to delay domain;
- b.1.2) from antenna domain to angle domain;
- and
- b.1.3) from time domain to Doppler domain,
- wherein the at least one second transformation performs at least one of transformations:
- b.3.1) from Doppler domain to time domain;
- b.3.2) from angle domain to antenna domain;
- and
- b.3.3) from delay domain to frequency domain,
- wherein the at least one second transformation performs an inverse transformation of the at least one first transformation.
A channel prediction method by a processor in a communication device that is configured to communicate with another communication device through a wireless channel in a multi-antenna wireless communication system, comprising:
- a) estimating at least one first channel response of the wireless channel based on a predetermined signal received from the another communication device;
- and
- b) extrapolating the at least one first channel response to obtain a second channel response by an extrapolating method for signal transmission to the another communication device at a time instant where no channel estimation is performed,
- wherein the b) comprises:
- b.1) transforming the at least one first channel response by at least one first transformation to generate at least one first intermediate channel response;
- b.2) extrapolating the at least one first intermediate channel response to obtain at least one second intermediate channel response;
- and
- b.3) transforming the at least one second intermediate channel response by at least one second transformation to generate the second channel response,
- wherein the at least one first transformation comprises at least one of transformations:
- b.1.1) from frequency domain to delay domain;
- b.1.2) from antenna domain to angle domain;
- and
- b.1.3) from time domain to Doppler domain,
- wherein the at least one second transformation comprises at least one of transformations:
- b.3.1) from Doppler domain to time domain;
- b.3.2) from angle domain to antenna domain;
- and
- b.3.3) from delay domain to frequency domain,
- wherein the at least one second transformation performs an inverse transformation of the at least one first transformation.
A non-transitory recording medium storing a computer-readable program for channel prediction in a communication device that is configured to communicate with another communication device through a wireless channel in a multi-antenna wireless communication system, the computer-readable program comprising instructions that, when executed by at least one processor, cause the at least one processor to:
- a) estimate at least one first channel response of the wireless channel based on a predetermined signal received from the another communication device;
- and
- b) extrapolate the at least one first channel response to obtain a second channel response by an extrapolating method for signal transmission to the another communication device at a time instant where no channel estimation is performed,
- wherein the b) comprises:
- b.1) transforming the at least one first channel response by at least one first transformation to generate at least one first intermediate channel response;
- b.2) extrapolating the at least one first intermediate channel response to obtain at least one second intermediate channel response;
- and
- b.3) transforming the at least one second intermediate channel response by at least one second transformation to generate the second channel response,
- wherein the at least one first transformation comprises at least one of transformations:
- b.1.1) from frequency domain to delay domain;
- b.1.2) from antenna domain to angle domain;
- and
- b.1.3) from time domain to Doppler domain,
- wherein the at least one second transformation comprises at least one of transformations:
- b.3.1) from Doppler domain to time domain;
- b.3.2) from angle domain to antenna domain;
- and
- b.3.3) from delay domain to frequency domain,
- wherein the at least one second transformation performs an inverse transformation of the at least one first transformation.
Dependencies are inferred from the claim text.