Method and apparatus for information transmission in a radio communication system

1. A method of transmitting, by a transmitter, information in a wireless communication system, the method comprising:

generating first and second symbols;

generating first and second transmit vectors on the basis of an Alamouti code from the first and second symbols; and

transmitting the first transmit vector through a first antenna and transmitting the second transmit vector through a second antenna,

wherein the first transmit vector consists of a first transmit symbol and a second transmit symbol, the first transmit symbol is transmitted based on a first resource index, and the second transmit symbol is transmitted based on a second resource index,

wherein the second transmit vector consists of a third transmit symbol and a fourth transmit symbol, the third transmit symbol is transmitted based on the first resource index, and the fourth transmit symbol is transmitted based on the second resource index,

wherein the first symbol is a first modulation symbol for first information, and the second symbol is a second modulation symbol for second information, and

wherein the first transmit symbol is generated based on the first symbol, the second transmit symbol is generated based on the second symbol, the third transmit symbol is obtained by appending a negative sign to a complex conjugate of the second transmit symbol, and the fourth transmit symbol is a complex conjugate of the first transmit symbol.

2. The method of claim 1 , wherein the first resource index or the second resource index includes a sequence index indicating a sequence, and the sequence allows a corresponding transmit symbol to be spread to a frequency domain or a time domain, and

wherein the first resource index and the second resource index include different sequence indices.

3. The method of claim 2 , wherein the sequence index indicates a cyclic shift amount, and the sequence is generated by cyclically shifting a base sequence by the cyclic shift amount.

4. The method of claim 2 , wherein the sequence index is one sequence index selected from a set of sequence indices, and sequences indicated by the sequence indices are orthogonal to each other.

5. The method of claim 1 , wherein the first resource index or the second resource index includes resource block information indicating a resource block on which a corresponding transmit symbol is transmitted and a sequence index indicating a sequence, and the sequence allows the corresponding transmit symbol to be spread to a frequency domain and a time domain, and

wherein the first resource index and the second resource index include different resource block information or different sequence indices.

6. The method of claim 1 , wherein the first resource index or the second resource index includes a frequency-domain sequence index indicating a frequency-domain sequence and a time-domain sequence index indicating a time-domain sequence,

wherein the frequency-domain sequence and the time-domain sequence allow the corresponding transmit symbol to be spread to a 2 dimensional domain of a time-frequency domain, and

wherein the first resource index and the second resource index include different frequency-domain sequence indices or different time-domain sequence indices.

7. The method of claim 1 , wherein the first resource index or the second resource index includes resource block information indicating a resource block on which a corresponding transmit symbol is transmitted, a frequency-domain sequence index indicating a frequency-domain sequence, and a time-domain sequence index indicating a time-domain sequence,

wherein the frequency-domain sequence and the time-domain sequence allow the corresponding transmit symbol to be spread to a 2 dimensional domain of a time-frequency domain, and

wherein at least one of the resource block information, the frequency-domain sequence index, and the time-domain sequence index included in each of the first resource index and the second resource index is different.

8. The method of claim 1 , further comprising obtaining the first resource index and the second resource index.

9. The method of claim 1 , wherein the first information and the second information are different control information.

10. A transmitter in a wireless communication system, the transmitter comprising:

a modulator configured to generate a first symbol and a second symbol by modulating an information bit stream;

a space block coding (SBC) processor configured to generate a first transmit vector consisting of a first transmit symbol and a second transmit symbol, and a second transmit vector consisting of a third transmit symbol and a fourth transmit symbol on the basis of an Alamouti code from the first and second symbols;

a first antenna configured to transmit the first transmit vector; and

a second antenna configured to transmit the second transmit vector,

wherein the first transmit symbol is transmitted based on a first resource index, and the second transmit symbol is transmitted based on a second resource index,

wherein the third transmit symbol is transmitted based on the first resource index, and the fourth transmit symbol is transmitted based on the second resource index, and

wherein the first transmit symbol is generated based on the first symbol, the second transmit symbol is generated based on the second symbol, the third transmit symbol is obtained by appending a negative sign to a complex conjugate of the second transmit symbol, and the fourth transmit symbol is a complex conjugate of the first transmit symbol.

11. The transmitter of claim 10 , wherein the first resource index or the second resource index includes a sequence index indicating a sequence, and the sequence allows a corresponding transmit symbol to be spread to a frequency domain or a time domain, and

wherein the first resource index and the second resource index include different sequence indices.

12. The transmitter of claim 11 , wherein the sequence index indicates a cyclic shift amount, and the sequence is generated by cyclically shifting a base sequence by the cyclic shift amount.

13. The transmitter of claim 11 , wherein the sequence index is one sequence index selected from a set of sequence indices, and sequences indicated by the sequence indices are orthogonal to each other.

14. The transmitter of claim 10 , wherein the first resource index or the second resource index includes resource block information indicating a resource block on which a corresponding transmit symbol is transmitted and a sequence index indicating a sequence, and the sequence allows the corresponding transmit symbol to be spread to a frequency domain and a time domain, and

wherein the first resource index and the second resource index include different resource block information or different sequence indices.

15. The transmitter of claim 10 , wherein the first resource index or the second resource index includes a frequency-domain sequence index indicating a frequency-domain sequence and a time-domain sequence index indicating a time-domain sequence,

wherein the frequency-domain sequence and the time-domain sequence allow the corresponding transmit symbol to be spread to a 2 dimensional domain of a time-frequency domain, and

wherein the first resource index and the second resource index include different frequency-domain sequence indices or different time-domain sequence indices.

16. The transmitter of claim 10 , wherein the first resource index or the second resource index includes resource block information indicating a resource block on which a corresponding transmit symbol is transmitted, a frequency-domain sequence index indicating a frequency-domain sequence, and a time-domain sequence index indicating a time-domain sequence,

wherein the frequency-domain sequence and the time-domain sequence allow the corresponding transmit symbol to be spread to a 2 dimensional domain of a time-frequency domain, and

wherein at least one of the resource block information, the frequency-domain sequence index, and the time-domain sequence index included in each of the first resource index and the second resource index is different.