Method and apparatus for wideband operation in NR communication system

1. A method comprising:

selecting, by a wireless user device and among a plurality of synchronization signal (SS) blocks, a first SS block comprising a first synchronization signal and comprising a first physical broadcast channel (PBCH);

determining, from the first PBCH of the selected first SS block, a value of a first subcarrier offset between the first SS block and a Resource Block (RB) grid;

determining, based on the value of the first subcarrier offset and a frequency location of the first SS block, a frequency location of the RB grid; and

decoding, based on the determined frequency location of the RB grid, one or more of: a reference signal, a control channel, or a data channel,

wherein the plurality of SS blocks comprise the first SS block and a second SS block,

wherein the second SS block comprises a second synchronization signal and a second PBCH,

wherein the second PBCH indicates a value of a second subcarrier offset between the second SS block and the RB grid, and

wherein a distance between the first SS block and a center frequency of a carrier is different from a distance between the second SS block and the center frequency of the carrier.

2. The method of claim 1 , further comprising:

determining, based on the first subcarrier offset, frequency information of a physical resource block (PRB).

3. The method of claim 1 , wherein a frequency bandwidth of the first SS block corresponds to total frequency bandwidths of a plurality of physical resource blocks (PRBs), and wherein a quantity of the plurality of PRBs is an even number.

4. The method of claim 1 , further comprising:

determining, based on the RB grid, a physical resource block (PRB) index; and

determining, based on the PRB index, one or more resources associated with the one or more of the reference signal, the control channel, or the data channel.

5. The method of claim 1 , wherein the first subcarrier offset is represented by a quantity of subcarriers, and

wherein the value of the first subcarrier offset comprises a 4-bit value associated with the quantity of subcarriers.

6. The method of claim 1 , wherein the first subcarrier offset indicates an offset between the frequency location of the first SS block and a frequency location of a physical resource block (PRB).

7. The method of claim 1 , wherein the frequency location of the first SS block comprises a synchronization raster.

8. The method of claim 7 , wherein the synchronization raster is a nominal synchronization raster.

9. The method of claim 1 , further comprising:

detecting, based on a synchronization raster, the first synchronization signal and the first PBCH; and

retrieving, from decoding of the first PBCH, master information block (MIB) information to obtain the value of the first subcarrier offset.

10. The method of claim 1 , wherein the RB grid is determined based on a subcarrier spacing.

11. The method of claim 1 , further comprising determining, based on a plurality of synchronization rasters in a frequency band, a frequency of the center of the first SS block.

12. The method of claim 1 , wherein each of the plurality of SS blocks is associated with a different frequency.

13. A method comprising:

determining, by a base station, frequency locations of a plurality of synchronization signal (SS) blocks comprising a frequency location of a first SS block;

determining, based on the frequency location of the first SS block and a frequency location of a resource block (RB) grid, a value of a first subcarrier offset between the first SS block and the RB grid;

generating the first SS block comprising a first synchronization signal and comprising a first physical broadcast channel (PBCH), wherein the first PBCH comprises the value of the first subcarrier offset between the first SS block and the RB grid;

transmitting, to a wireless user device, the first SS block; and

mapping, to one or more resources associated with the frequency location of the RB grid, one or more of: a reference signal, a control channel, or a data channel,

wherein a frequency location of the one or more resources is based on the frequency location of the RB grid,

wherein the plurality of SS blocks comprise the first SS block and a second SS block,

wherein the second SS block comprises a second synchronization signal and a second PBCH,

wherein the second PBCH indicates a value of a second subcarrier offset between the second SS block and the RB grid, and

wherein a distance between the first SS block and a center frequency of a carrier is different from a distance between the second SS block and the center frequency of the carrier.

14. The method of claim 13 , further comprising:

determining, based on the first subcarrier offset, frequency information of a physical resource block (PRB).

15. The method of claim 13 , wherein a frequency bandwidth of the first SS block corresponds to total frequency bandwidths of a plurality of physical resource blocks (PRBs), and wherein a quantity of the plurality of PRBs is an even number.

16. The method of claim 13 , further comprising:

determining, based on the RB grid, a physical resource block (PRB) index,

wherein, based on the PRB index, the one or more resources associated with the RB grid are determined.

17. The method of claim 13 , wherein the first subcarrier offset is represented by a quantity of subcarriers, and

wherein the value of the first subcarrier offset comprises a 4-bit value associated with the quantity of subcarriers.

18. The method of claim 13 , wherein the first subcarrier offset indicates an offset between the frequency location of the first SS block and a frequency location of a physical resource block (PRB).

19. The method of claim 13 , wherein the frequency location of the first SS block comprises a synchronization raster.

20. The method of claim 19 , wherein the synchronization raster is a nominal synchronization raster.

21. The method of claim 13 , wherein the RB grid is determined based on a subcarrier spacing.

22. The method of claim 13 , wherein each of the plurality of SS blocks is associated with a different frequency.