Synchronization signal transmission techniques for peak-to-average power ratio reduction

Abstract

Methods, systems, and devices for wireless communication are described. Synchronization signals may be transmitted using a set of phase offsets over different component carriers or using a single component carrier for each antenna port. For example, a base station may identify a set of synchronization signals (e.g., a set of primary synchronization signals (PSSs)) to be transmitted over one or multiple component carriers. In some cases, each PSS may be associated with a different component carrier, and the base station may apply a different phase offset to each PSS when transmitting the set of PSSs on the component carriers. In some examples, the base station may transmit the PSSs on the component carriers using a different antenna port for each component carrier.

What is claimed is: 
     
         1 . A method for wireless communication at a base station, comprising:
 identifying a set of synchronization signal blocks; and   transmitting each synchronization signal block of the set of synchronization signal blocks, each synchronization signal block being transmitted on one or more component carriers of a set of component carriers or transmitted simultaneously on a wideband carrier.   
     
     
         2 . The method of  claim 1 , wherein transmitting each synchronization signal block comprises:
 transmitting each synchronization signal block using a different antenna port of the base station or using a same antenna port of the base station.   
     
     
         3 . The method of  claim 2 , further comprising:
 generating a synchronization signal block corresponding to the different antenna port; and   transmitting the synchronization signal block in a different component carrier of the set of component carriers from the different antenna port.   
     
     
         4 . The method of  claim 1 , wherein transmitting each synchronization signal block on the one or more component carriers comprises:
 transmitting each synchronization signal block on different component carriers of the set of component carriers, each synchronization signal block associated with a different component carrier of the set of component carriers.   
     
     
         5 . The method of  claim 1 , wherein transmitting each synchronization signal block comprises:
 transmitting each synchronization signal block using a first beam configuration having a first width greater than a second width of a second beam configuration, the second beam configuration associated with transmitting a synchronization signal block over multiple component carriers of the set of component carriers from a same antenna port.   
     
     
         6 . The method of  claim 5 , wherein the first beam configuration is based at least in part on a plurality of beam directions. 
     
     
         7 . The method of  claim 1 , further comprising:
 identifying a first transmit power greater than a second transmit power, the second transmit power associated with transmitting a synchronization signal block over multiple component carriers of the set of component carriers from a same antenna port, wherein transmitting each synchronization signal block in the one or more component carriers of the set of component carriers includes using the first transmit power.   
     
     
         8 . The method of  claim 1 , wherein each synchronization signal block comprises at least one or more of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), and a demodulation reference signal (DMRS) of the PBCH. 
     
     
         9 . The method of  claim 1 , further comprising:
 identifying an indication of an antenna port associated with different component carriers, or a selected transmission beam, or both, wherein transmitting the synchronization signal block comprises transmitting the indication.   
     
     
         10 . The method of  claim 1 , wherein transmitting each synchronization signal block comprises:
 refraining from transmitting another signal while transmitting each synchronization signal block.   
     
     
         11 . An apparatus for wireless communication at a base station, comprising:
 a processor;   memory coupled with the processor; and   instructions stored in the memory and executable by the processor to cause the apparatus to:
 identify a set of synchronization signal blocks; and 
 transmit each synchronization signal block of the set of synchronization signal blocks, each synchronization signal block being transmitted on one or more component carriers of a set of component carriers or transmitted simultaneously on a wideband carrier. 
   
     
     
         12 . The apparatus of  claim 11 , wherein the instructions to transmit each synchronization signal block are executable by the processor to cause the apparatus to:
 transmit each synchronization signal block using a different antenna port of the base station or using a same antenna port of the base station.   
     
     
         13 . The apparatus of  claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:
 generate a synchronization signal block corresponding to the different antenna port; and   transmit the synchronization signal block in a different component carrier of the set of component carriers from the different antenna port.   
     
     
         14 . The apparatus of  claim 11 , wherein the instructions to transmit each synchronization signal block on the one or more component carriers are executable by the processor to cause the apparatus to:
 transmit each synchronization signal block on different component carriers of the set of component carriers, each synchronization signal block associated with a different component carrier of the set of component carriers.   
     
     
         15 . The apparatus of  claim 11 , wherein the instructions to transmit each synchronization signal block are executable by the processor to cause the apparatus to:
 transmit each synchronization signal block using a first beam configuration having a first width greater than a second width of a second beam configuration, the second beam configuration associated with transmitting a synchronization signal block over multiple component carriers of the set of component carriers from a same antenna port.   
     
     
         16 . The apparatus of  claim 15 , wherein the first beam configuration is based at least in part on a plurality of beam directions. 
     
     
         17 . The apparatus of  claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:
 identify a first transmit power greater than a second transmit power, the second transmit power associated with transmitting a synchronization signal block over multiple component carriers of the set of component carriers from a same antenna port, wherein transmitting each synchronization signal block in the one or more component carriers of the set of component carriers includes using the first transmit power.   
     
     
         18 . The apparatus of  claim 11 , wherein each synchronization signal block comprises at least one or more of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), and a demodulation reference signal (DMRS) of the PBCH. 
     
     
         19 . The apparatus of  claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:
 identify an indication of an antenna port associated with different component carriers, or a selected transmission beam, or both, wherein transmitting the synchronization signal block comprises transmitting the indication.   
     
     
         20 . An apparatus for wireless communication at a base station, comprising:
 means for identifying a set of synchronization signal blocks; and   means for transmitting each synchronization signal block of the set of synchronization signal blocks, each synchronization signal block being transmitted on one or more component carriers of a set of component carriers or transmitted simultaneously on a wideband carrier.