Patent ID: 8730898

Claim:
A method of transmitting an uplink control signal in a wireless communication system, the method comprising: generating a plurality of first data orthogonal frequency division multiplexing (OFDM) symbols based on a first control signal; generating a plurality of first reference signal (RS) OFDM symbols based on a plurality of first RS sequences; generating a plurality of second data OFDM symbols based on a second control signal; generating a plurality of second RS OFDM symbols based on a plurality of second RS sequences; generating a plurality of third modulation symbols by modulating a third control signal; and transmitting the first, second, and third control signals in a first slot and a second slot, wherein the first slot includes the plurality of first data OFDM symbols and the plurality of first RS OFDM symbols, and the second slot includes the plurality of second data OFDM symbols and the plurality of second RS OFDM symbols, wherein the plurality of third modulation symbols are spread to at least one of the plurality of first RS sequences and to at least one of the plurality of second RS sequences, and wherein if the plurality of third modulation symbols are expressed as d 1 , d 2 and d 3 , if the plurality of first RS sequences are expressed as R 1 (0) and R 1 (1), and if the plurality of second RS sequences are expressed as R 2 (0) and R 2 (1), then the R 1 (1) is multiplied by the d 1 , the R 2 (0) is multiplied by the d 3 and the R 2 (1) is multiplied by the product of the d 2 and d 3 .