Synchronization signals for narrowband operation

A method for wireless communications by a first type of user equipment (UE), comprising:

• detecting, within one or more narrowband carrier regions, a primary synchronization signal (PSS) generated utilizing a first code sequence and a cover code applied to the first code sequence over a first number of symbols within one or more subframes, wherein the cover code comprises a binary sequence, wherein the one or more narrowband carrier regions is within a guard-band of a wider carrier bandwidth;
• and
• performing time synchronization and a frequency synchronization based on the PSS.

An apparatus for wireless communications, comprising:

• at least one processor configured to generate a primary synchronization signal (PSS) utilizing a first code sequence and a cover code applied to the first code sequence over a first number of symbols within one or more subframes, wherein the cover code comprises a computer generated binary sequence;
• and
• a transmitter configured to transmit the PSS to a first type of a user equipment (UE) that communicates on one or more narrowband carrier regions, wherein the one or more narrowband carrier regions is within a guard-band of a wider carrier bandwidth.

An apparatus for wireless communications, comprising:

• at least one processor configured to detect, within one or more narrowband carrier regions, a primary synchronization signal (PSS) generated utilizing a first code sequence and a cover code applied to the first code sequence over a first number of symbols within one or more subframes, wherein the cover code comprises a computer generated binary sequence, and perform time synchronization and a frequency synchronization based on the PSS, wherein the one or more narrowband carrier regions is within a guard-band of a wider carrier bandwidth;
• and
• a memory coupled with the at least one processor.