USER EQUIPMENT, A RADIO BASE STATION, RBS, AND METHODS THEREIN FOR TRANSMITTING A SUBFRAME COMPRISING AT LEAST TWO REFERENCE SIGNALS, RSS, TO THE RBS

摘要

A method in a UE comprises: receiving, from an RBS, information regarding a base sequence and a first phase rotation speed of the base sequence; determining an order, L, of the IFDMA, indicating a spacing between subcarriers over which the base sequence is to be mapped in the frequency domain; generating an RS-specific second phase rotation speed of the base sequence based on a CS pseudo random offset; increasing at least the second phase rotation speed based on L; combining the first and the increased second phase rotation speeds to obtain a third phase rotation speed, and performing phase rotation of the base sequence based on the third phase rotation speed; and mapping the phase rotated base sequence to every L:th subcarrier of the RSs, and transmitting the RSs.

主权项

1. A method performed by a User Equipment, UE, operable in a wireless communication system employing Orthogonal Frequency Division Multiplexing, OFDM, for transmitting a subframe comprising at least two Reference Signals, RSs, to a Radio Base Station, RBS, the wireless communication system employing Cyclic Shift, CS, the UE supporting Interleaved Frequency Domain Multiple Access, IFDMA, the method comprising for each RS of the subframe to be transmitted:
receiving, from the RBS, information regarding a base sequence and a first phase rotation speed of the base sequence in the frequency domain; determining an order, L, of the IFDMA, indicating a spacing between subcarriers over which the base sequence is to be mapped in the frequency domain; generating a RS-specific second phase rotation speed of the base sequence in the frequency domain based on a CS pseudo random offset; increasing at least the second phase rotation speed of the base sequence in the frequency domain based on the order of the IFDMA, L; combining the first and the increased second phase rotation speeds of the base sequence in the frequency domain to obtain a third phase rotation speed; performing phase rotation of the base sequence based on the third phase rotation speed; mapping the phase rotated base sequence to every L:th subcarrier of the RSs; and transmitting the RSs.