Method for transmitting control information in wireless communication systems

A method of receiving a frame, the method comprising:

• receiving the frame from a terminal, the frame comprising a control signal;
• transforming the control signal to generate a transformed control signal;
• multiplying the transformed control signal with a first sequence to generate a second sequence;
• and
• determining uplink control information based on the second sequence,
• wherein the first sequence is one of a first set of sequences which are orthogonal to each other in time domain, and
• wherein the first set of sequences consists of three (3) sequences, the three sequences comprising at least two sequences of (1, 1, 1, 1) and (1, −1, 1, −1).

A method of transmitting a frame, the method comprising:

• generating a first sequence based on uplink control information;
• multiplying the first sequence with a third sequence to generate a control signal;
• generating the frame comprising the control signal;
• and
• transmitting the frame to a base station,
• wherein the third sequence is one of a first set of sequences which are orthogonal to each other in time domain, and
• wherein the first set of sequences consists of three (3) sequences, the three sequences comprising at least two sequences of (1, 1, 1, 1) and (1, −1, 1, −1).