Pulse-shaped and overlapping reference signal

Methods and apparatus related to pulse-shaped and overlapped reference signals are disclosed. Signaling is transmitted between a first communication device and a second communication device in a wireless communication network, the signaling indicating information associated with a length of a base sequence and a length of a cyclic rotation. The DMRS is also transmitted in the wireless communication network. The DMRS includes a DMRS sequence of a target length, the DMRS sequence including a base sequence cyclically rotated by a length of the cyclic rotation. In some embodiments, the loop extension is also applied to the base sequence.