Transmission or reception of a reference signal in a wireless communication system
First Claim
1. A method performed by a wireless device configured for use in a wireless communication system, the method comprising:
- receiving reference symbols of a reference signal on respective radio resources, including first and second sets of radio resources that differ in at least one radio resource, wherein the first set of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance, with no reference symbol of the reference signal on any radio resource between the first pair of radio resources in the radio resource domain, and wherein the second set of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance, with no reference symbol of the reference signal on any radio resource between the second pair of radio resources in the radio resource domain, wherein the second separation distance is at least twice as large as the first separation distance, wherein the first set of radio resources is a subset of the second set of radio resources; and
performing frequency estimation in two steps, wherein in a first step, a first frequency is estimated based on reference symbols of the first set of radio resources, and in a second step, a second frequency is estimated based on reference symbols of the second set of radio resources and the first frequency estimate.
1 Assignment
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Accused Products
Abstract
A radio node (12, 14) is configured to transmit or receive reference symbols (18) of a reference signal (16) on respective radio resources, including first and second sets (S1, S2) of radio resources that differ in at least one radio resource. The reference signal (16) may be for instance a tracking reference signal (16) configured for time or frequency tracking. The first set (S1) of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance (D1). The second set (S2) of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance (D2). The radio resource domain may be a time domain or a frequency domain. In one or more embodiments, the second separation distance (D2) is at least twice as large as the first separation distance (D1).
6 Citations
24 Claims
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1. A method performed by a wireless device configured for use in a wireless communication system, the method comprising:
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receiving reference symbols of a reference signal on respective radio resources, including first and second sets of radio resources that differ in at least one radio resource, wherein the first set of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance, with no reference symbol of the reference signal on any radio resource between the first pair of radio resources in the radio resource domain, and wherein the second set of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance, with no reference symbol of the reference signal on any radio resource between the second pair of radio resources in the radio resource domain, wherein the second separation distance is at least twice as large as the first separation distance, wherein the first set of radio resources is a subset of the second set of radio resources; and performing frequency estimation in two steps, wherein in a first step, a first frequency is estimated based on reference symbols of the first set of radio resources, and in a second step, a second frequency is estimated based on reference symbols of the second set of radio resources and the first frequency estimate. - View Dependent Claims (2, 3, 4, 5, 9, 10)
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6. A radio network node configured for use in a wireless communication system, the radio network node comprising:
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radio circuitry configured to transmit to a wireless device reference symbols of a reference signal on respective radio resources, including first and second sets of radio resources that differ in at least one radio resource, wherein the first set of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance, with no reference symbol of the reference signal on any radio resource between the first pair of radio resources in the radio resource domain, and wherein the second set of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance, with no reference symbol of the reference signal on any radio resource between the second pair of radio resources in the radio resource domain, wherein the second separation distance is at least twice as large as the first separation distance, wherein the radio resource domain is a time domain or a frequency domain, wherein the first set of radio resources is a subset of the second set of radio resources; and processing circuitry configured to configure the wireless device to perform frequency estimation in two steps, wherein a first frequency is to be estimated based on reference symbols of the first set of radio resources, and in a second step, a second frequency is to be estimated based on reference symbols of the second set of radio resources and the first frequency estimate. - View Dependent Claims (7, 8, 11, 12)
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13. A wireless device configured for use in a wireless communication system, the wireless device comprising:
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radio circuitry configured to receive reference symbols of a reference signal on respective radio resources, including first and second sets of radio resources that differ in at least one radio resource, wherein the first set of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance, with no reference symbol of the reference signal on any radio resource between the first pair of radio resources in the radio resource domain, and wherein the second set of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance, with no reference symbol of the reference signal on any radio resource between the second pair of radio resources in the radio resource domain, wherein the second separation distance is at least twice as large as the first separation distance, wherein the first set of radio resources is a subset of the second set of radio resources; and processing circuitry configured to perform frequency estimation in two steps, wherein in a first step, a first frequency is estimated based on reference symbols of the first set of radio resources, and in a second step, a second frequency is estimated based on reference symbols of the second set of radio resources and the first frequency estimate. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method performed by a radio network node configured for use in a wireless communication system, the method comprising:
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transmitting to a wireless device reference symbols of a reference signal on respective radio resources, including first and second sets of radio resources that differ in at least one radio resource, wherein the first set of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance, with no reference symbol of the reference signal on any radio resource between the first pair of radio resources in the radio resource domain, and wherein the second set of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance, with no reference symbol of the reference signal on any radio resource between the second pair of radio resources in the radio resource domain, wherein the second separation distance is at least twice as large as the first separation distance, wherein the radio resource domain is a time domain or a frequency domain, wherein the first set of radio resources is a subset of the second set of radio resources; and configuring the wireless device to perform frequency estimation in two steps, wherein a first frequency is to be estimated based on reference symbols of the first set of radio resources, and in a second step, a second frequency is to be estimated based on reference symbols of the second set of radio resources and the first frequency estimate. - View Dependent Claims (21, 22, 23, 24)
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Specification