Patent ID: 8638880
Filing Date: 2014-01-28
Classification: H04J,H04L,H04W

Abstract:
1. A method in a user equipment for transmitting uplink control information in time slots of a subframe over a radio channel to a radio base station, wherein the user equipment and radio base station are comprised in a radio communications network, wherein the radio channel is configured to carry the uplink control information, wherein the uplink control information is comprised in a block of bits, and wherein the method comprises: mapping the block of bits to a sequence of complex valued modulation symbols, block spreading the sequence of complex valued modulation symbols across Discrete Fourier Transform Spread-Orthogonal Frequency Division Multiplexing (DFTS-OFDM) symbols by applying a spreading sequence to the sequence of complex valued modulation symbols, to achieve a block spread sequence of complex valued modulation symbols, transforming, per DFTS-OFDM symbol, the block-spread sequence of complex valued modulation symbols by applying a matrix to the block-spread sequence of complex valued modulation symbols, wherein the matrix comprises matrix elements that are cyclically shifted depending on at least one of a DFTS-OFDM symbol index and a slot index, and transmitting the block spread sequence of complex valued modulation symbols, as transformed, over the radio channel to the radio base station.