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US 10,708,900 B2Granted
Generating and transmitting demodulation reference signals
AssigneeHuawei Technologies Co., Ltd.
InventorsBranislav Popovic, Weijun Sun
Life of this patent
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Abstract
The present disclosure provides a solution which solves the problem of demodulation reference signal (DMRS) ambiguity by introducing separate, i.e. different DMRSs. This is especially the case for systems employing dynamic allocation of control and data signals to different PRBs.
Claims20
An apparatus, comprising:
- a receiver configured to receive communication signals;
- a memory containing computer instructions for execution by at least one processor;
- and
- at least one processor coupled to retrieve and execute the computer instructions wherein, when executed by the at least one processor, cause the apparatus to:
- receive and process at least one first receiver specific demodulation reference signal associated with a data channel having time-frequency resource elements (REs) of a first physical resource block (PRB) that are utilized for transmission of the data channel and the at least one first receiver specific demodulation reference signal, and also having time-frequency REs of the first PRB that are utilized for transmission of the at least one first receiver specific demodulation reference signal located in a first set of RE positions in the first PRB,
- receive at least one second receiver specific demodulation reference signal associated with a control channel that is associated with the data channel, the at least one second receiver specific demodulation reference signal being different from the at least one first receiver specific demodulation reference signal, wherein:
- time-frequency REs of a second PRB are utilized for transmission of the control channel and the at least one second receiver specific demodulation reference signal,
- time-frequency REs of the second PRB being utilized for transmission of the at least one second receiver specific demodulation reference signal located in a second set of RE positions in the second PRB, and
- the second set of RE positions in the second PRB overlap with the first set of RE positions in the first PRB, and a first sequence of symbols {ap(k)}, k=0, 1, . . . , L−1 is used for modulating time-frequency REs at a first set of RE positions in a first PRB for generation of the at least one first receiver specific demodulation reference signal, the first PRB being used for transmission of the data channel at a transmitting antenna port p, and L is a positive integer;
- and
- demodulate the control channel by using the at least one second receiver specific demodulation reference signal.
8 more elements
An apparatus, comprising:
- transceiver circuitry;
- and
- processing circuitry coupled to the transceiver circuitry,
- wherein the apparatus is configured to:
- transmit at least one first receiver specific demodulation reference signal associated with a data channel, having time-frequency resource elements (REs) of a first physical resource block (PRB) for transmission of the data channel and the at least one first receiver specific demodulation reference signal, and time-frequency REs of the first PRB being utilized for transmission of the at least one first receiver specific demodulation reference signal located in a first set of RE positions in the first PRB;
- and
- transmit at least one second receiver specific demodulation reference signal associated with a control channel associated with the data channel, the at least one second receiver specific demodulation reference signal is different from the at least one first receiver specific demodulation reference signal, time-frequency REs of a second PRB are utilized for transmission of the control channel and the at least one second receiver specific demodulation reference signal, the time-frequency REs of the second PRB are further utilized for transmission of the at least one second receiver specific demodulation reference signal located in a second set of RE positions in the second PRB, and the second set of RE positions in the second PRB overlap with the first set of RE positions in the first PRB, wherein a first sequence of symbols {ap (k)}, k=0, 1, . . . , L−1 is used for modulating time-frequency REs at a first set of RE positions in a first PRB for generation of the at least one first receiver specific demodulation reference signal, the first PRB being used for transmission of the data channel at a transmitting antenna port p, and L is a positive integer.
4 more elements
A communications system, comprising:
- a first apparatus, configured to transmit at least one first receiver specific demodulation reference signal associated with a data channel, wherein time-frequency resource elements (Res) of a first physical resource block (PRB) are utilized for transmission of the data channel and the at least one first receiver specific demodulation reference signal, and time-frequency REs of the first PRB being utilized for transmission of the at least one first receiver specific demodulation reference signal located in a first set of RE positions in the first PRB, and to transmit at least one second receiver specific demodulation reference signal associated with a control channel, wherein the control channel is associated with the data channel, the at least one second receiver specific demodulation reference signal is different from the at least one first receiver specific demodulation reference signal, time-frequency REs of a second PRB are utilized for transmission of the control channel and the at least one second receiver specific demodulation reference signal, the time-frequency REs of the second PRB are further utilized for transmission of the at least one second receiver specific demodulation reference signal located in a second set of RE positions in the second PRB, and the second set of RE positions in the second PRB overlap with the first set of RE positions in the first PRB, wherein a first sequence of symbols {ap (k)}, k=0,1, . . . , L−1 is used for modulating time-frequency REs at a first set of RE positions in a first PRB for generation of the at least one first receiver specific demodulation reference signal, the first PRB being used for transmission of the data channel at a transmitting antenna port p, and L is a positive integer;
- and
- a second apparatus, configured to receive the at least one first receiver specific demodulation reference signal and the at least one second receiver specific demodulation reference signal, and to demodulate the control channel by using the at least one second receiver specific demodulation reference signal.
Dependencies are inferred from the claim text.