Reference signal and control information processing in 5G-NR wireless systems
A user equipment (UE) can include processing circuitry coupled to memory. To configure the UE for New Radio (NR) communications above a 52.6 GHz carrier frequency, the processing circuitry is to decode radio resource control (RRC) signaling to obtain a cyclic shift value in time domain. The cyclic shift value is associated with a demodulation reference signal (DM-RS) antenna port (AP) of a plurality of available DM-RS APs. A single carrier based waveform DM-RS sequence corresponding to the DM-RS AP is generated using a base sequence and the cyclic shift value. The single carrier based waveform DM-RS sequence is encoded with uplink data for transmission to a base station using a physical uplink shared channel (PUSCH) using a carrier above the 52.6 GHz carrier frequency.
1. An apparatus, comprising:
memory; and
processing circuitry in communication with the memory, wherein to configure the apparatus for New Radio (NR) communications above a 52.6 GHz carrier frequency, the processing circuitry is configured to:
decode radio resource control (RRC) signaling to obtain a cyclic shift value in time domain, wherein the cyclic shift value is associated with a demodulation reference signal (DM-RS) antenna port (AP) of a plurality of available DM-RS APs;
generate a single carrier based waveform DMRS sequence corresponding to the DM-RS AP using a base sequence and the cyclic shift value, wherein a hopping pattern is applied to the base sequence, and wherein the hopping pattern is initialized using at least a single carrier with frequency domain equalizer (SC-FDE) block index or an SC-FDE sub-block index; and
encode the single carrier based waveform DM-RS sequence with uplink data for transmission to a base station using a physical uplink shared channel (PUSCH) using a carrier above the 52.6 GHz carrier frequency.
2. The apparatus of claim 1 ,
wherein the base sequence is one of a Zadoff-Chu sequence or a computer-generated sequence (CGS).
3. The apparatus of claim 1 ,
wherein the single carrier based waveform DM-RS sequence is a single carrier with frequency domain equalizer (SC-FDE) DM-RS sequence generated according to the following equation: y(n)=r u,v ((n+L) mod N ZC ), n=0, 1, . . . , N, where r u,v (n) is the base sequence, N ZC is the base sequence length, L is the cyclic shift value, N is the base sequence length, u is a group number, and v is a number of the base sequence within the group.
4. The apparatus of claim 1 ,
wherein the processing circuitry is further configured to:
insert a guard interval (GI) sequence before and after the DM-RS sequence within a single carrier with frequency domain equalizer (SC-FDE) block, wherein the GI sequence is independently generated from the DM-RS sequence.
5. The apparatus of claim 1 ,
wherein the processing circuitry is further configured to:
insert a guard interval (GI) sequence before the DM-RS sequence within a single carrier with frequency domain equalizer (SC-FDE) block, wherein a length of the DM-RS sequence equals a Fast Fourier Transform (FFT) size and the GI sequence is a portion of the DM-RS sequence.
6. The apparatus of claim 1 ,
wherein the processing circuitry is further configured to:
apply a block-wised orthogonal cover code (OCC) to the DM-RS sequence in time domain to generate a block-wised spread DM-RS sequence, wherein the block-wised spread DM-RS sequence associated with one of the plurality of available DM-RS APs.
7. The apparatus of claim 6 ,
wherein the block-wised OCC is applied on a block level or a sub-block level.
8. The apparatus of claim 6 ,
wherein the processing circuitry is further configured to:
decode downlink control information (DCI) indicating an AP for use during the uplink data transmission,
generate the block-wised spread DM-RS sequence based on the indicated AP; and
encode the block-wised spread DM-RS sequence with the uplink data for transmission to the base station using the PUSCH.
9. The apparatus of claim 1 ,
wherein the apparatus further comprises:
transceiver circuitry coupled to the processing circuitry; and
one or more antennas coupled to the transceiver circuitry.
10. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a base station operating in a 5G network, the instructions to configure the one or more processors for New Radio (NR) communications above a 52.6 GHz carrier frequency and to cause the base station to:
encode radio resource control (RRC) signaling with a cyclic shift value in time domain for transmission to a user equipment (UE), wherein the cyclic shift value is associated with a demodulation reference signal (DM-RS) antenna port (AP) of a plurality of available DM-RS APs;
decode a single carrier based waveform DM-RS sequence corresponding to the DM-RS AP, the DM-RS sequence received from the UE with uplink data via a physical uplink shared channel (PUSCH) using a carrier above the 52.6 GHz carrier frequency, wherein the DM-RS sequence is a single carrier based waveform DM-RS sequence generated using a base sequence and the cyclic shift value, wherein a hopping pattern is applied to the base sequence, and wherein the hopping pattern is initialized using at least a single carrier with frequency domain equalizer (SC-FDE) block index;
determine a channel estimate of the PUSCH using the DM-RS sequence; and
decode the uplink data based on the channel estimate; and
encode the single carrier based waveform DM-RS sequence with uplink data for transmission to a base station using a physical uplink shared channel (PUSCH).
11. The non-transitory computer-readable storage medium of claim 10 ,
wherein the base sequence is one of a Zadoff-Chu sequence or a computer-generated sequence (CGS).
12. The non-transitory computer-readable storage medium of claim 10 ,
wherein the single carrier based waveform DM-RS sequence is a single carrier with frequency domain equalizer (SC-FDE) DM-RS sequence generated according to the following equation: y(n)=fr u,v ((n+L) mod N ZC ), n=0, 1, . . . , N, where r u,v (n) is the base sequence, N ZC is the base sequence length, L is the cyclic shift value, N is the base sequence length, u is a group number, and v is a number of the base sequence within the group.
13. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE), the instructions to configure the one or more processors for New Radio (NR) communications above a 52.6 GHz carrier frequency and to cause the UE to:
decode radio resource control (RRC) signaling to obtain a cyclic shift value in time domain, wherein the cyclic shift value associated with a demodulation reference signal (DM-RS) antenna port (AP) of a plurality of available DM-RS APs;
generate a single carrier based waveform DM-RS sequence corresponding to the DM-RS AP using a base sequence and the cyclic shift value, wherein a hopping pattern is applied to the base sequence, and wherein the hopping pattern is initialized using at least a single carrier with frequency domain equalizer (SC-FDE) sub-block index; and
encode the single carrier based waveform DM-RS sequence with uplink data for transmission to a base station using a physical uplink shared channel (PUSCH) using a carrier above the 52.6 GHz carrier frequency.
14. The non-transitory computer-readable storage medium of claim 13 ,
wherein the instructions further configure the one or more processors to cause the UE to:
insert a guard interval (GI) sequence before and after the DM-RS sequence within a single carrier with frequency domain equalizer (SC-FDE) block, wherein the GI sequence is independently generated from the DM-RS sequence.
15. The non-transitory computer-readable storage medium of claim 13 ,
wherein the instructions further configure the one or more processors to cause the UE to:
insert a guard interval (GI) sequence before the DM-RS sequence within a single carrier with frequency domain equalizer (SC-FDE) block, wherein a length of the DM-RS sequence equals a Fast Fourier Transform (FFT) size and the GI sequence is a portion of the DM-RS sequence.
16. The non-transitory computer-readable storage medium of claim 13 ,
wherein the instructions further configure the one or more processors to cause the UE to:
apply a block-wised orthogonal cover code (OCC) to the DM-RS sequence in time domain to generate a block-wised spread DM-RS sequence, wherein the block-wised spread DM-RS sequence is associated with one of the plurality of available DM-RS APs.
17. The non-transitory computer-readable storage medium of claim 16 ,
wherein the block-wised OCC is applied on a block level or a sub-block level.
18. The non-transitory computer-readable storage medium of claim 16 ,
wherein the instructions further configure the one or more processors to cause the UE to:
decode downlink control information (DCI) indicating an AP for use during the uplink data transmission;
generate the block-wised spread DM-RS sequence based on the indicated AP; and
encode the block-wised spread DM-RS sequence with the uplink data for transmission to the base station using the PUSCH.
19. The non-transitory computer-readable storage medium of claim 13 ,
wherein the base sequence is one of a Zadoff-Chu sequence or a computer-generated sequence (CGS).
20. The non-transitory computer-readable storage medium of claim 13 ,
wherein the single carrier based waveform DM-RS sequence is a single carrier with frequency domain equalizer (SC-FDE) DM-RS sequence generated according to the following equation: y(n)=fr u,v ((n+L) mod N ZC ), n=0, 1, . . . , N, where r u,v (n) is the base sequence, N ZC is the base sequence length, L is the cyclic shift value, N is the base sequence length, u is a group number, and v is a number of the base sequence within the group.