1. A method of wireless communication by a base station, comprising:determining a synchronization signal (SS) index for a SS block, the SS block comprising a plurality of synchronization signals multiplexed for transmission on predetermined resources;
generating a first SS of the plurality of synchronization signals using the SS index;
frequency division multiplexing the first SS with at least a second synchronization signal (SSS) of the SS block, wherein the SSS comprises a secondary synchronization signal that carries information about a physical layer cell identity group number for the base station; and
transmitting the SS block including the first SS generated using the SS index frequency division multiplexed with the SSS on the predetermined resources, wherein the first SS is frequency division multiplexed with the SSS in at least one OFDM symbol, and wherein the SS index is conveyed using a shift of a pseudo-noise (PN) sequence of the first SS.