DEVICE AND METHOD FOR HSPA WCDMA UPLINK PILOTS
First Claim
1. A User Equipment, a UE, for an HSPA enabled WCDMA system, the UE being equipped with at least a first and a second transmit antenna, the UE being arranged to use one or more sets of pre-coding weights, each pre-coding weight in said one or more sets to be used by the UE for multiplication with information which is transmitted from one of the UE'"'"'s antennas, the UE further being arranged to receive instructions from a NodeB an the set or sets of pre-coding weights to be used, the UE also being arranged to transmit a first and a second pilot signal, and to use a first set of pre-coding weights for the first pilot signal and a second set of pre-coding weights for the second pilot signal, where the first set of pre-coding weights is the same as the UE uses for transmitting a first data stream, and to use different spreading codes for the first data stream and for the first pilot signal.
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Accused Products
Abstract
A UE, for an HSPA WCDMA system, equipped with a first and a second transmit antenna, and arranged to use one or more sets of pre-coding weights for transmission. The UE is arranged to receive instructions from a NodeB on the set or sets of pre-coding weights to be used, and to transmit a first and a second pilot signal, and to use a first set of pre-coding weights for the first pilot signal and a second set of pre-coding weights for the second pilot signal, where the first set of pre-coding weights is the same as the UE uses for transmitting a first data stream, and to use different spreading codes for the first data stream and for the first pilot signal.
12 Citations
22 Claims
- 1. A User Equipment, a UE, for an HSPA enabled WCDMA system, the UE being equipped with at least a first and a second transmit antenna, the UE being arranged to use one or more sets of pre-coding weights, each pre-coding weight in said one or more sets to be used by the UE for multiplication with information which is transmitted from one of the UE'"'"'s antennas, the UE further being arranged to receive instructions from a NodeB an the set or sets of pre-coding weights to be used, the UE also being arranged to transmit a first and a second pilot signal, and to use a first set of pre-coding weights for the first pilot signal and a second set of pre-coding weights for the second pilot signal, where the first set of pre-coding weights is the same as the UE uses for transmitting a first data stream, and to use different spreading codes for the first data stream and for the first pilot signal.
- 11. A NodeB for an HSPA enabled WCDMA system, the NodeB being arranged to receive from a UE a first and a second pilot signal transmitted from the UE with respective first and second sets of pre-coding weights, as well as to receive from the UE a first data stream which has been transmitted from the UE with said first set of pre-coding weights but with a different spreading code than the first pilot signal, the NodeB being arranged to transmit instructions to the UE on at least one of the first and second sets of pre-coding weights, and to use said first and second pilot signals in order to determine said instructions.
- 15. A method for operating a User Equipment, a UE, for an HSPA enabled WCDMA system, the UE being equipped with at least a first and a second transmit antenna, the method comprising receiving instructions from a NodeB on one or more sets of pre-coding weights to be used in transmissions from the UE, the method comprising using each pre-coding weight in said one or more sets for multiplication with information which is transmitted from one of the UE'"'"'s antennas the method further comprising transmitting a first and a second pilot signal, and using a first of said sets of pre-coding weights for the first pilot signal and a second of said sets of pre-coding weights for the second pilot signal, and also using the first set of pre-coding weights for transmitting a first data stream, the method further comprising using different spreading codes for the first data stream and for the first pilot signal.
- 19. A method for operating a NodeB for an HSPA enabled WCDMA system, the method comprising receiving from a UE a first and a second pilot signal transmitted from the UE with respective first and second sets of pre-coding weights, as well as receiving from the UE a first data stream which has been transmitted from the UE with said first set of pre-coding weights but with a different spreading code than the first pilot signal, the method comprising transmitting instructions to the UE on at least one of the first and second sets of pre-coding weights, and using said first and second pilot signals in order to determine said instructions to the UE.
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22. The method of 19, comprising transmitting instructions to the UE regarding different levels of output power that the UE should use for transmitting the first and second pilot signals.
Specification