Method and apparatus for jointly performing channel estimation and interference estimation in a wireless communication system
First Claim
1. A method for estimating characteristics of a channel, the method comprising:
- receiving a transmission of known reference data at a receiving device, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and
determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining includingselecting certain of the layers to be estimated at each of the known reference data,selecting certain of the layers to be estimated over a range of the known reference data,selecting certain of the one or more desired layers or the one or more interfering layers to be frequency-flat in the joint estimation, wherein statistics of the frequency-flat layers are used in the joint estimation rather than instantaneous values of the frequency-flat layers, andsolving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation.
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Abstract
Systems and methods for estimating characteristics of a channel are provided. A transmission of known reference data is received at a receiving device. The reference data is transmitted over the channel that includes one or more desired layers and one or more interfering layers. Characteristics of the channel are determined based on the known reference data, where the determining includes a joint estimation of the one or more desired layers and the one or more interfering layers. The determining includes selecting certain of the layers to be estimated at each of the known reference data and selecting certain of the layers to be estimated over a range of the known reference data. The determining includes solving an equation to jointly estimate the one or more desired layers and the one or more interfering layers based on the selections. The selections reduce a number of unknown values in the equation.
6 Citations
20 Claims
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1. A method for estimating characteristics of a channel, the method comprising:
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receiving a transmission of known reference data at a receiving device, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the one or more desired layers or the one or more interfering layers to be frequency-flat in the joint estimation, wherein statistics of the frequency-flat layers are used in the joint estimation rather than instantaneous values of the frequency-flat layers, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A receiver or estimating characteristics of a channel, the receiver comprising:
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a processing system; and a memory coupled to the processing system, wherein the processing system is configured to execute steps including; receiving a transmission of known reference data, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the one or more desired layers the one or more interfering layers to be frequency-flat in the joint estimation, wherein statistics of the frequency-flat layers are used in the joint estimation rather than instantaneous values of the frequency-flat layers, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for estimating characteristics of a channel, the method comprising:
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receiving a transmission of known reference data at a receiving device, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the layers to be frequency-flat and selecting certain of the layers to be frequency-selective, wherein a total number of layers is equal to four, wherein two of the four layers are selected to be frequency-flat, and wherein two of the four layers are selected to be frequency-selective, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation.
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16. A method for estimating characteristics of a channel, the method comprising:
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receiving a transmission of known reference data at a receiving device, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the layers to be frequency-flat and selecting certain of the layers to be frequency-selective, wherein the one or more desired layers are selected to be frequency-selective, and wherein the one or more interfering layers are selected to be frequency-flat, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation.
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17. A method for estimating characteristics of a channel, the method comprising:
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receiving a transmission of known reference data at a receiving device, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the layers to be frequency-flat and selecting certain of the layers to be frequency-selective, wherein a dominant interfering layer of the one or more interfering layers is selected to be frequency-selective, and wherein others of the one or more interfering layers are selected to be frequency-flat, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation.
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18. A receiver for estimating characteristics of a channel, the receiver comprising:
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a processing system; and a memory coupled to the processing system, wherein the processing system is configured to execute steps including; receiving a transmission of known reference data, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the layers to be frequency-flat and selecting certain of the layers to be frequency-selective, wherein a total number of layers is equal to four, wherein two of the four layers are selected to be frequency-flat, and wherein two of the four layers are selected to be frequency-selective, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation.
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19. A receiver for estimating characteristics of a channel, the receiver comprising:
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a processing system; and a memory coupled to the processing system, wherein the processing system is configured to execute steps including; receiving a transmission of known reference data, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the layers to be frequency-flat and selecting certain of the layers to be frequency-selective, wherein the one or more desired layers are selected to be frequency-selective, and wherein the one or more interfering layers are selected to be frequency-flat, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation.
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20. A receiver for estimating characteristics of a channel, the receiver comprising:
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a processing system; and a memory coupled to the processing system, wherein the processing system is configured to execute steps including; receiving a transmission of known reference data, wherein the known reference data is transmitted over the channel comprising layers that include one or more desired layers and one or more interfering layers; and determining characteristics of the channel based on the known reference data, the determining including a joint estimation of the one or more desired layers and the one or more interfering layers, and the determining including selecting certain of the layers to be estimated at each of the known reference data, selecting certain of the layers to be estimated over a range of the known reference data, selecting certain of the layers to be frequency-flat and selecting certain of the layers to be frequency-selective, wherein a dominant interfering layer of the one or more interfering layers is selected to be frequency-selective, and wherein others of the one or more interfering layers are selected to be frequency-flat, and solving an equation for the joint estimation of the one or more desired layers and the one or more interfering layers based on the selections, the selections reducing a number of unknown values in the equation.
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Specification