Reference signal design for beamforming in wireless communication systems

A method comprising:

• configuring a set of interleaved frequency division multiple access (IFDMA)-based beam management (BM) reference signal (RS) for transmission (TX) and receiving (RX) beams in a multi-beam wireless network by concatenating a plurality of IFDMA signals each defined over a corresponding numerology, wherein at least two IFDMA signals have different numerology;
• determining a plurality of TX beam switching points for TX beam sweepings, wherein each TX beam remains the same in each IFDMA signals, and wherein each TX switching points is one of boundary of adjacent IFDMA signals;
• determining a plurality of RX beam switching points within the reference numerology for RX beam sweepings;
• and
• sweeping TX and RX beams based on corresponding TX and RX beam switching points to generate a TX/RX beam pair links (BPL) profile, wherein the TX and RX beams are fixed when generating each BPL in the profile, and wherein the BPL profile is generated by correlating receiving signals in corresponding sub-time unit in one of a time frequency domain with an equivalent of phase-rotated modulating sequence derived from an original modulating sequence of corresponding IFDMA signal defined over its corresponding reference numerology.

A user equipment (UE) comprising:

• a transceiver that transmits and receives radio signals in a multi-beam wireless communication network;
• a transmission (TX) beam unit that determines an interleaved frequency division multiple access (IFDMA)-based beam management (BM) reference signal (RS) TX beam switching points and performs TX beam sweeping on the TX beam switching points, wherein the TX beam is a part of a reference numerology within a single IFDMA or a concatenation of a plurality of IFDMA signals each defined over a corresponding numerology;
• and
• a receiving (RX) beam unit that determines an IFDMA BM RS RX beam switching points and performs RX beam sweeping on the RX beam switching points, wherein the RX beam is a part of a reference numerology within a single IFDMA or a concatenation of a plurality of IFDMA signals each defined over a corresponding numerology, wherein a TX/RX beam pair links (BPL) profile is generated by correlating receiving signals in corresponding sub-time unit in which the TX and RX beams are fixed in one of a time or frequency domain with an equivalent of a phase-rotated modulating sequence derived from an original modulating sequence defined over the reference numerology.