Method and device for transmitting reference signal
Embodiments of this application provide a method for transmitting a reference signal, including: sending, by a network device to UE, information about a waveform, an antenna port, and a resource block, where the waveform includes an OFDM waveform or a DFT-s-OFDM waveform, the antenna port indicates a resource mapping pattern used by the UE to send or receive a reference signal, and in a symbol of the resource mapping pattern, a reference signal corresponding to the DFT-s-OFDM waveform is mapped in frequency domain in a comb-shaped manner, and a reference signal corresponding to the OFDM waveform is mapped to a frequency domain resource to which the DFT-s-OFDM waveform is not mapped; and sending, by the network device, the reference signal or receiving the reference signal on the resource block based on the information about the waveform, the information about the antenna port, and the information about the resource block.
1. A method for sending and receiving a reference signal, wherein the method comprises:
receiving, by a first user equipment (UE), information about a waveform, an antenna port, and a resource block, wherein the waveform comprises a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, the antenna port indicates a resource mapping pattern of the reference signal,
a reference signal corresponding to the DFT-s-OFDM waveform, in a symbol of the resource mapping pattern, is mapped in frequency domain in a comb-shaped manner and occupies a first set of reference signal resource elements, and a second set of the reference signal resource elements, in the symbol of the resource mapping pattern, is occupied by a reference signal corresponding to an orthogonal frequency division multiplexing (OFDM) waveform, and wherein the reference signal corresponding to the OFDM waveform is mapped in frequency domain in a comb-shaped manner, or the reference signal corresponding to the OFDM waveform is transmitted on a resource element set comprising two consecutive subcarriers; and
sending, or receiving the reference signal on the resource block based on the information about the waveform, the antenna port, and the resource block.
2. The method according to claim 1 , wherein the method further comprises:
orthogonalizing, by using an orthogonal code, the reference signal on the resource element set comprising two consecutive subcarriers.
3. A method for sending and receiving a reference signal, wherein the method comprises:
sending, by a network device to a first user equipment device (UE) and a second UE, information about a waveform, an antenna port, and a resource block, wherein a waveform of the second UE is an orthogonal frequency division multiplexing (OFDM) waveform and a waveform of the first UE is a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, the antenna port indicates a resource mapping pattern of a reference signal,
a reference signal corresponding to the DFT-s-OFDM waveform, in a symbol of the resource mapping pattern, is mapped in frequency domain in a comb-shaped manner and occupies a first set of reference signal resource elements, and wherein
a reference signal corresponding to the OFDM waveform, in the symbol of the resource mapping pattern, occupies a second set of the reference signal resource elements and is mapped in frequency domain in a comb-shaped manner, or is transmitted on a resource element set comprising two consecutive subcarriers; and
sending, or receiving the reference signal on the resource block based on the information about the waveform, the antenna port, and the resource block.
4. The method according to claim 3 , wherein the reference signal on the resource element set comprising two consecutive subcarriers is orthogonalized by using an orthogonal code.
5. A communication device, wherein the communication device comprises:
a transceiver;
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the communication device to:
receive, by using the transceiver, information about a waveform, an antenna port, and a resource block, wherein the waveform comprises a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, the antenna port indicates a resource mapping pattern of a reference signal,
a reference signal corresponding to the DFT-s-OFDM waveform, in a symbol of the resource mapping pattern, is mapped in frequency domain in a comb-shaped manner and occupies a first set of reference signal resource elements, and a second set of the reference signal resource elements, in the symbol of the resource mapping pattern, is occupied by a reference signal corresponding to an orthogonal frequency division multiplexing (OFDM) waveform, and wherein the
reference signal corresponding to the OFDM waveform is mapped in frequency domain in a comb-shaped manner, or the reference signal corresponding to the OFDM waveform is transmitted on a resource element set comprising two consecutive subcarriers, and wherein
send or receive, by using the transceiver, the reference signal on the resource block based on the information about the waveform, the antenna port, and the resource block.
6. The communication device according to claim 5 , wherein the programming instructions, when executed by the at least one processor, cause the communication device to:
orthogonalize, by using an orthogonal code, the reference signal on the resource element set comprising two consecutive subcarriers.
7. A network device, wherein the network device comprises:
a transceiver;
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the network device to:
send, by using the transceiver, to a first user equipment device (UE) and a second UE, information about a waveform, an antenna port, and a resource block, wherein a waveform of the second UE is an orthogonal frequency division multiplexing (OFDM) waveform and a waveform of the first UE is a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, the antenna port indicates a resource mapping pattern of a reference signal,
a reference signal corresponding to the DFT-s-OFDM waveform, in a symbol of the resource mapping pattern, is mapped in frequency domain in a comb-shaped manner and occupies a first set of reference signal resource elements, and wherein
a reference signal corresponding to the OFDM waveform, in the symbol of the resource mapping pattern, occupies a second set of the reference signal resource elements and is mapped in frequency domain in a comb-shaped manner, or is transmitted on a resource element set comprising two consecutive subcarriers, and
send or receive, by using the transceiver, the reference signal on the resource block based on the information about the waveform, the antenna port, and the resource block.
8. The network device according to claim 7 , wherein the reference signal on the resource element set comprising two consecutive subcarriers is orthogonalized by using an orthogonal code.
9. A non-transitory computer-readable storage medium storing computer instructions, that when executed by one or more hardware processors, cause a communication device to perform operations comprising:
receiving, by a first user equipment (UE), information about a waveform, an antenna port, and a resource block, wherein the waveform comprises a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, the antenna port indicates a resource mapping pattern of the reference signal,
a reference signal corresponding to the DFT-s-OFDM waveform, in a symbol of the resource mapping pattern, is mapped in frequency domain in a comb-shaped manner and occupies a first set of reference signal resource elements, and a second set of the reference signal resource elements, in the symbol of the resource mapping pattern, is occupied by a reference signal corresponding to an orthogonal frequency division multiplexing (OFDM) waveform, and wherein the
reference signal corresponding to the OFDM waveform is mapped in frequency domain in a comb-shaped manner, or the reference signal corresponding to the OFDM waveform is transmitted on a resource element set comprising two consecutive subcarriers; and
sending, or receiving the reference signal on the resource block based on the information about the waveform, the antenna port, and the resource block.