Sequence Derivation for Reference Signal Patterns
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorStefano Sorrentino
Life of this patent
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Abstract
A reference signal, RS, is generated in a wireless communication system based on a starting position, in the frequency domain, of the RS and a transmission channel bandwidth of the RS. At least one of the starting position of the RS and the bandwidth allocated to a transmission channel for the RS is/are ascertained. A base sequence index, BSI, is then derived by mapping at least one ascertained of the RS starting position and transmission channel bandwidth (12) according to a predefined mapping rule (14) to the BSI (16). The RS is determined based on the derived BSI.
Claims33
1-32. (canceled)
A method of generating a reference signal (RS) in a wireless communication system, comprising:
- ascertaining at least one of a starting position, in the frequency domain, of the RS, and a bandwidth allocated to a transmission channel for the RS;
- deriving a base sequence index (BSI) by mapping at least one ascertained of the starting position and transmission channel bandwidth according to a predefined mapping rule to the BSI;
- and
- determining the RS based on the derived BSI.
A controller for generating a reference signal (RS) in a wireless communication system, wherein the controller is configured to:
- ascertain at least one of a starting position, in the frequency domain, of the RS, and a bandwidth allocated to a transmission channel for the RS;
- derive a base sequence index (BSI) by mapping at least one ascertained of the starting position and transmission channel bandwidth according to a predefined mapping rule to the BSI;
- and
- determine the RS based on the derived BSI.
A computer program product comprising a non-transitory computer readable medium having stored therein a set of instructions for performing, when executed by a computer-based system, the steps of:
- ascertaining at least one of a starting position, in the frequency domain, of the RS, and a bandwidth allocated to a transmission channel for the RS;
- deriving a base sequence index (BSI) by mapping at least one ascertained of the starting position and transmission channel bandwidth according to a predefined mapping rule to the BSI;
- and
- determining the RS based on the derived BSI.
A transmitter, comprising:
- an antenna;
- a transmitter (TX) operatively coupled to the antenna and configured to transmit a reference signal (RS) to a receiver;
- and
- a controller configured to control the transmitter, and configured to:
- ascertain at least one of a starting position, in the frequency domain, of the RS to transmit, and a bandwidth allocated to the transmitter for transmission of the RS;
- derive a base sequence index (BSI) by mapping at least one ascertained of the starting position and transmission bandwidth according to a predefined mapping rule to the BSI;
- and
- determine a sequence to transmit as the RS based on the derived BSI.
A receiver, comprising:
- an antenna;
- a receiver (RX) operatively coupled to the antenna and configured to receive a reference signal (RS) transmitted from a transmitter, wherein the received RS differs from the RS initially transmitted from the transmitter due to distortion effects injected by the wireless communication channel;
- and
- a controller configured to:
- ascertain at least one of a starting position, in the frequency domain, of the RS, and a bandwidth allocated to a transmission channel for the RS;
- derive a base sequence index (BSI) by mapping at least one ascertained of the starting position and transmission channel bandwidth according to a predefined mapping rule to the BSI;
- and
- determine the RS initially transmitted from the transmitter based on the derived BSI;
- and
- a channel estimator configured to execute a channel estimation algorithm and estimate the wireless communication channel based on the received RS and the determined RS.
A wireless communication system, comprising:
- a first base transceiver operative to provide wireless communications in a first cell;
- a first mobile transceiver associated with the first cell and operative to transmit a reference signal (RS) to the first base transceiver, the RS comprising a data sequence based on a base sequence index (BSI) generated by the first mobile transceiver;
- a second base transceiver operative to provide wireless communications in a second different cell;
- a second mobile transceiver associated with the second cell and operative to transmit a reference signal (RS) to the second base transceiver, the RS comprising a data sequence based on a BSI generated by the second mobile transceiver;
- wherein when the first and second mobile transceivers are scheduled in the respective first and second cells such that they have the same starting position, in frequency, for transmitting RS, and/or they have the same allocated transmission bandwidth for transmission of RS, the first and second mobile transceivers are configured to generate the same BSI based on information representative of at least one of the starting position and transmission bandwidth.
A controller for generating a reference signal (RS) said controller comprising:
- an ascertainer configured to ascertain at least one of a starting position, in the frequency domain, of the RS, and a bandwidth allocated to a transmission channel for the RS;
- a base sequence index (BSI) deriver configured to derive a BSI by mapping at least one of the starting position and transmission channel bandwidth according to a predefined mapping rule;
- and
- a RS determiner configured to determine the RS based on the derived BSI.
Dependencies are inferred from the claim text.