Frame structure design for new carrier type (NCT)

1. A user equipment (UE) to receive a synchronization signal in a downlink signal in a wireless network, comprising:

at least one antenna capable of receiving a new carrier type (NCT) downlink signal comprising demodulation reference signals (DMRS) in at least one subframe of the NCT downlink signal, the demodulation reference signals comprising a first DMRS pattern for a first plurality of physical resource blocks (PRBs) of the at least one subframe and a second DMRS pattern for a second plurality of PRBs of the at least one subframe, the second plurality of PRBs comprising a predetermined number of PRBs adjacent to a center frequency of the at least one subframe;

wherein the first DMRS pattern is applied to PRBs that do not have an overlap between a demodulation reference signal and a synchronization signal, and the second DMRS pattern is applied to PRBs that have an overlap between a demodulation reference signal and a synchronization signal; and

a receiver coupled to the at least one antenna, the receiver being capable of demodulating the demodulation reference signals in the NCT downlink signal;

wherein at least one PRB of the PRBs adjacent to the center frequency of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and wherein the demodulation reference signal pattern comprises OFDM symbols 2-3 and 12-13 of the PRB.

2. The UE according to claim 1 , wherein at least one subframe comprises a plurality of PRBs, each PRB comprising a selected portion of a frequency bandwidth of the at least one subframe and comprising a predetermined number of OFDM symbols, and

wherein the demodulation reference signal pattern of a PRB is based on a bandwidth position of the PRB in the at least one subframe.

3. The UE according to claim 2 , wherein at least one PRB of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 0-1 and 7-8 of the PRB.

4. The UE according to claim 1 , wherein the predetermined number of PRBs adjacent to the center frequency is six.

5. The UE according to claim 1 , wherein at least one PRB of the PRBs adjacent to the center frequency of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 1-2 and 12-13 of the PRB.

6. The UE according to claim 1 , wherein at least one PRB of the PRBs adjacent to the center frequency of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 0-1 and 12-13 of the PRB or OFDM symbols 0-1 and 7-8 of the PRB.

7. The UE according to claim 1 , wherein at least one PRB of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 5-6 and 9-10 of the PRB, or OFDM symbols 5-6 and 11-12 of the PRB.

8. The UE according to claim 1 , wherein at least one PRB of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 5-6 and 12-13 of the PRB, and a synchronization pattern comprises symbols 0-1, or 1-2 or 1-3 of the PRB.

9. The UE according to claim 1 , wherein the UE comprises a cellular telephone, smartphone, smart-type device, or tablet-type device.

10. The UE according to claim 1 , further comprising a touchscreen display capable of receiving input information from a touch of a user or a stylus.

11. The UE according to claim 1 , wherein the wireless network comprises a network based on a Third Generation Partnership Project Long Term Evolution (3GPP LTE) based wireless network standard.

12. A method of receiving a synchronization signal in a downlink signal, the method comprising:

receiving a new carrier type (NCT) downlink signal comprising demodulation reference signals (DMRS) and synchronization signals in at least one predetermined subframe of the downlink signal, the demodulation reference signals comprising a first DMRS pattern for a first plurality of physical resource blocks (PRBs) of the at least one subframe and a second DMRS pattern for a second plurality of PRBs of the at least one subframe;

wherein the first DMRS pattern is applied to PRBs that do not have an overlap between a demodulation reference signal and a synchronization signal, and the second DMRS pattern is applied to PRBs that have an overlap between a demodulation reference signal and a synchronization signal; and

demodulating the demodulation reference signals in the downlink signal;

wherein at least one PRB of the PRBs adjacent to the center frequency of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and wherein the demodulation reference signal pattern comprises OFDM symbols 2-3 and 12-13 of the PRB.

13. The method according to claim 12 , wherein the second plurality of PRBs comprises a predetermined number of PRBs adjacent to a center frequency of the at least one subframe.

14. The method according to claim 13 , wherein the predetermined number of PRBs adjacent to the center frequency is six.

15. The method according to claim 12 , wherein at least one subframe comprises a plurality of PRBs, each PRB comprising a selected portion of a frequency bandwidth of the at least one subframe and comprising a predetermined number of OFDM symbols, and

wherein the demodulation reference signal pattern of a PRB is based on a bandwidth position of the PRB in the at least one subframe.

16. The method according to claim 12 , wherein at least one PRB of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 0-1 and 7-8 of the PRB.

17. The method according to claim 12 , wherein at least one PRB of the PRBs adjacent to the center frequency of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 1-2 and 12-13 of the PRB.

18. The method according to claim 12 , wherein at least one PRB of the PRBs adjacent to the center frequency of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 0-1 and 12-13 of the PRB or OFDM symbols 0-1 and 7-8 of the PRB.

19. The method according to claim 12 , wherein at least one PRB of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 5-6 and 9-10 of the PRB, or OFDM symbols 5-6 and 11-12 of the PRB.

20. The method according to claim 12 , wherein at least one PRB of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 5-6 and 12-13 of the PRB, and the synchronization pattern comprises symbols 0-1, or 1-2 or 1-3 of the PRB.

21. The method according to claim 12 , wherein the receiving of the downlink signal is performed by a device comprising a cellular telephone, smartphone, smart-type device, or tablet-type device.

22. The method according to claim 21 , wherein the device comprises a touchscreen display capable of receiving input information from a touch of a user or a stylus.

23. The method according to claim 12 , wherein the wireless network comprises a network based on a Third Generation Partnership Project Long Term Evolution (3GPP LTE) based wireless network standard.

24. An article comprising: a non-transitory computer-readable medium having stored thereon instructions that, if executed, result in at least the following:

receiving demodulation reference signals (DMRS) in at least one predetermined subframe of a downlink signal of a wireless network, the demodulation reference signals comprising a first DMRS pattern for a first plurality of physical resource blocks (PRBs) of the at least one subframe and a second DMRS pattern for a second plurality of PRBs of the at least one subframe, the second plurality of PRBs comprising a predetermined number of PRBs adjacent to a center frequency of the at least one subframe,

wherein the first DMRS pattern is applied to PRBs that do not have an overlap between a demodulation reference signal and a synchronization signal, and the second DMRS pattern is applied to PRBs that have an overlap between a demodulation reference signal and a synchronization signal, and

demodulating the demodulation reference signals in the downlink signal;

wherein at least one PRB of the PRBs adjacent to the center frequency of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and wherein the demodulation reference signal pattern comprises OFDM symbols 2-3 and 12-13 of the PRB.

25. The article according to claim 24 , wherein the receiving of the downlink signal is performed by a device comprising a cellular telephone, smartphone, smart-type device, or tablet-type device.

26. The article according to claim 25 , wherein the device comprising a touchscreen display capable of receiving input information from a touch of a user or a stylus.

27. The article according to claim 24 , wherein at least one physical resource block of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 0-1 and 7-8 of the PRB.

28. The article according to claim 24 , wherein at least one PRB of the at least one subframe comprises OFDM symbols respectively identified as OFDM symbols 0-13, and

wherein the demodulation reference signal pattern comprises OFDM symbols 5-6 and 12-13 of the PRB, and the synchronization pattern comprises symbols 0-1, or 1-2 or 1-3.