METHOD FOR DETERMINING DEMODULATION REFERENCE SIGNAL IN THE UPLINK, UE AND UPLINK SYSTEM
First Claim
1. A method for determining demodulation reference signal (DMRS) in the uplink, comprising:
- taking one of multiple transmit antennas in the uplink as a base transmit antenna, taking other transmit antennas as subordinating transmit antennas and setting a DMRS for the base transmit antenna;
establishing DMRS subordinating relationships between the base transmit antenna and each of the subordinating transmit antennas, and setting a DMRS for each of the subordinating transmit antennas according to the DMRS of the base transmit antenna and the corresponding DMRS subordinating relationship.
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Accused Products
Abstract
The present invention discloses a method for determining an uplink demodulation reference signal (DMRS), which includes: taking one of multiple transmit antennas in the uplink as a base transmit antenna, taking other transmit antennas as subordinating transmit antennas and setting a DMRS for the base transmit antenna; establishing DMRS subordinating relationships between the base transmit antenna and each of the subordinating transmit antennas; and setting a DMRS for each of the subordinating transmit antennas according to the DMRS of the base transmit antenna and the DMRS subordinating relationship between the base transmit antenna and each of the subordinating transmit antennas. The present invention also provides a user equipment (UE) and an uplink system for providing DMRSs for multiple transmit antennas. The method, UE and system are applicable in both SU-MIMO transmission and MU-MIMO transmission.
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Citations
20 Claims
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1. A method for determining demodulation reference signal (DMRS) in the uplink, comprising:
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taking one of multiple transmit antennas in the uplink as a base transmit antenna, taking other transmit antennas as subordinating transmit antennas and setting a DMRS for the base transmit antenna; establishing DMRS subordinating relationships between the base transmit antenna and each of the subordinating transmit antennas, and setting a DMRS for each of the subordinating transmit antennas according to the DMRS of the base transmit antenna and the corresponding DMRS subordinating relationship. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A user equipment (UE), wherein the UE has multiple transmit antennas and a multiplier is set for each transmit antenna;
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the UE further comprises;
a base sequence selection module and a demodulation reference signal (DMRS) subordination module;the base sequence selection module is adapted to determine a base sequence for DMRSs of the multiple transmit antennas; the DMRS subordination module is adapted to take one of the multiple transmit antennas as a base transmit antenna and take other transmit antennas as subordinating transmit antennas, establish subordinating relationships between a cyclic shift value of the DMRS of the base transmit antenna and that of each of the subordinating transmit antennas; and
determine the cyclic shift value of the DMRS of each subordinating transmit antenna according to the cyclic shift value of the DMRS of the base transmit antenna;the multiplier set for each transmit antenna is adapted to multiply the cyclic shift value of the corresponding transmit antenna and the base sequence to obtain the DMRS of the corresponding transmit antenna. - View Dependent Claims (14)
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15. An uplink communication system, comprising:
- a base station and multiple user equipments (UE), each of the UEs having one transmit antenna;
the base station is adapted to take one of the multiple transmit antennas of the multiple UEs as a base transmit antenna, take other transmit antennas as subordinating transmit antennas, and inform each UE of an uplink scheduling component of the cyclic shift value of corresponding demodulation reference signal (DMRS) through an uplink scheduling command, wherein DMRS subordinating relationships are established between the uplink scheduling component of the base transmit antenna and that of each of the subordinating transmit antennas; each UE is adapted to calculate the DMRS according to the uplink scheduling component of the cyclic shift value informed by the base station and a base sequence of the DMRS of the base transmit antenna. - View Dependent Claims (16)
- a base station and multiple user equipments (UE), each of the UEs having one transmit antenna;
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17. A method for determining demodulation reference signal (DMRS) in the uplink, comprising:
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taking one of multiple first data streams as a base data stream, taking other first data streams as subordinating data streams and setting a DMRS for the base data stream; establishing DMRS subordinating relationships between the base data stream and each of the subordinating data streams, and setting a DMRS for each of the subordinating data streams according to the DMRS of the base data stream and the corresponding DMRS subordinating relationship; and precoding each first data stream together with the DMRS set for the first data stream to form one or more second data streams, each of the second data streams being sent out from one transmit antenna in the uplink. - View Dependent Claims (18, 19, 20)
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Specification