SIGNALING OF DEDICATED REFERENCE SIGNAL (DRS) PRECODING GRANULARITY
First Claim
1. A method for communication, comprising:
- in a receiver, receiving signals, which comprise one or more dedicated reference signals, that are transmitted from a transmitter over a communication channel in multiple blocks, wherein the signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective preceding scheme that maps the signals onto multiple antenna ports of the transmitter;
identifying two or more of the blocks whose respective preceding schemes differ from one another by no more than a predefined distance;
estimating one or more parameters of the communication channel over the dedicated reference signals comprised in the identified blocks; and
decoding the signals based on the estimated parameters.
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Accused Products
Abstract
A method for communication includes receiving in a receiver signals, which include one or more dedicated reference signals and are transmitted from a transmitter over a communication channel in multiple blocks. The signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective preceding scheme that maps the signals onto multiple antenna ports of the transmitter. Two or more of the blocks whose respective preceding schemes differ from one another by no more than a predefined distance are identified. One or more parameters of the communication channel are estimated over the dedicated reference signals included in the identified blocks. The signals are decoded based on the estimated parameters.
154 Citations
19 Claims
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1. A method for communication, comprising:
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in a receiver, receiving signals, which comprise one or more dedicated reference signals, that are transmitted from a transmitter over a communication channel in multiple blocks, wherein the signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective preceding scheme that maps the signals onto multiple antenna ports of the transmitter; identifying two or more of the blocks whose respective preceding schemes differ from one another by no more than a predefined distance; estimating one or more parameters of the communication channel over the dedicated reference signals comprised in the identified blocks; and decoding the signals based on the estimated parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for communication, comprising:
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transmitting to a receiver signals, which comprise one or more dedicated reference signals, over a communication channel in multiple blocks, wherein the signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective preceding scheme that maps the signals onto multiple antenna ports of the transmitter; and transmitting to the receiver signaling information, which is indicative of two or more of the blocks whose respective preceding schemes differ from one another by no more than a predefined distance, so as to cause the receiver to estimate one or more parameters of the communication channel over the dedicated reference signals comprised in the identified blocks.
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10. A communication apparatus, comprising:
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one or more receive antennas; and a receiver, which is configured to receive via the receive antennas, signals comprising one or more dedicated reference signals, that are transmitted from a transmitter over a communication channel in multiple blocks, wherein the signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective preceding scheme that maps the signals onto multiple antenna ports of the transmitter, to identify two or more of the blocks whose respective preceding schemes differ from one another by no more than a predefined distance, to estimate one or more parameters of the communication channel over the dedicated reference signals comprised in the identified blocks, and to decode the signals based on the estimated parameters. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A communication apparatus, comprising:
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multiple antenna ports; and a transmitter, which is configured to transmit over a communication channel to a receiver signals comprising one or more dedicated reference signals, wherein the signals are transmitted in multiple blocks, wherein the signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective preceding scheme that maps the signals onto the multiple antenna ports, and wherein the transmitter is further configured to transmit to the receiver signaling information, which is indicative of two or more of the blocks whose respective preceding schemes differ from one another by no more than a predefined distance, so as to cause the receiver to estimate one or more parameters of the communication channel over the dedicated reference signals comprised in the identified blocks.
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Specification