Apparatus and method for transmitting data using repeat accumulate coding scheme in communication system

1. An apparatus for transmitting data in a communication system, comprising:

a first repeater configured to repeat information bits of data to be transmitted a first repetition number of times;

an interleaver configured to interleave the information bits repeated the first repetition number of times;

an accumulator configured to accumulate-code the interleaved information bits;

a second repeater configured to repeat the accumulate-coded information bits a second repetition number of times;

a puncturer configured to puncture the information bits repeated the second repetition number of times; and

a Parallel/Serial (P/S) converter configured to convert the punctured information bits and the information bits of the data and output Repeat Accumulate (RA)-coded information bits.

2. The apparatus of claim 1 , wherein the puncturer is configured to puncture one of a predetermined number of information bits from the information bits repeated the second repetition number of times.

3. The apparatus of claim 2 , wherein the first repetition number, the second repetition number, and the predetermined number are determined in conformity with a coding rate applied to the information bits of the data.

4. The apparatus of claim 1 , wherein the accumulator comprises:

a delay unit configured to delay the accumulate-coded information bits; and

an adder configured to add the delayed accumulate-coded information bits and the interleaved information bits and output the accumulate-coded information bits.

5. The apparatus of claim 4 , wherein the adder is configured to perform modulo-2 addition operation of the delayed accumulate-coded information bits and the interleaved information bits.

6. The apparatus of claim 4 , wherein the adder is configured to output regular RA-coded information bits as the accumulate-coded information bits, and the puncturer is configured to output irregular RA-coded information bits as the punctured information bits.

7. The apparatus of claim 1 , wherein

the information bits of the data and the punctured information bits are of a parallel type; and

the P/S converter is configured to convert the information bits of the data and the punctured information bits into the Repeat Accumulate (RA)-coded information bits of a serial type.

8. An apparatus for transmitting data in a communication system, comprising:

a coder configured to perform concatenate first and second repetitions on information bits of data to be transmitted in conformity with a coding rate, and to puncture the twice-repeated information bits to generate Repeat Accumulate (RA)-coded information bits, wherein

the coder is configured to determine numbers of repetition for the first and second repetitions and a number of the punctured information bits in conformity with the coding rate.

9. An apparatus of for transmitting data in a communication system, comprising:

a coder configured to perform first and second repetitions on information bits of data to be transmitted in conformity with a coding rate, and to puncture the twice-repeated information bits to generate Repeat Accumulate (RA)-coded information bits, wherein

the coder is configured to determine numbers of repetition for the first and second repetitions and a number of the punctured information bits in conformity with the coding rate; and

the coder includes

a first coder configured to perform the first repetition of the information bits of the data, interleave the repeated information bits, and accumulate-code the interleaved information bits to generate regular RA-coded information bits; and

a second coder configured to perform the second repetition of the regular RA-coded information bits and puncture the second-repeated information bits to generate irregular RA-coded information bits.

10. The apparatus of claim 9 , wherein the first coder comprises:

a first repeater configured to perform the first repetition of the information bits of the data a predetermined repetition number of times;

an interleaver configured to interleave the first-repeated information bits; and

an accumulator configured to accumulate-code the interleaved information bits and output the regular RA-coded information bits.

11. The apparatus of claim 10 , wherein the accumulator comprises:

a delay unit configured to delay the regular RA-coded information bits; and

an adder configured to add the delayed regular RA-coded information bits and the interleaved information bits and output the regular RA-coded information bits.

12. The apparatus of claim 11 , wherein the adder is configured to perform modulo-2 addition operation of the delayed regular RA-coded information bits and the interleaved information bits.

13. The apparatus of claim 9 , wherein the second coder comprises:

a second repeater configured to perform the second repetition of the regular RA-coded information bits a predetermined repetition number of times; and

a puncturer configured to puncture one of a predetermined number of information bits from the second-repeated information bits and output the irregular RA-coded information bits.

14. The apparatus of claim 9 , wherein the coder comprises:

a P/S converter configured to serial-convert the irregular RA-coded information and the information bits of the data of parallel type and output the RA-coded information bits of serial type.

15. A method for transmitting data in a communication system, comprising:

performing first repetition of information bits of data to be transmitted a predetermined repetition number of times;

interleaving the first-repeated information bits;

accumulate-coding the interleaved information bits;

performing second repetition of the accumulate-coded information bits a predetermined repetition number of times; and

puncturing the second-repeated information bits and converting the punctured information bits to generate a Repeat Accumulate (RA)-coded information bits.

16. The method of claim 15 , wherein in said puncturing the second-repeated information bits and converting the punctured information bits to generate a RA-coded information bits,

one of a predetermined number of information bits from the second-repeated information bits is punctured to generate irregular RA-coded information bits.

17. The method of claim 16 , wherein in said puncturing the second-repeated information bits and converting the punctured information bits to generate a RA-coded information bits,

the irregular RA-coded information bits and the information bits of the data are of a parallel type, and

the RA-coded information bits are of a serial type.

18. The method of claim 16 , wherein the repetition numbers for the first and second repetitions and the predetermined number are determined in conformity with a coding rate applied to the information bits of the data.

19. The method of claim 15 , wherein said accumulate-coding the interleaved information bits comprises:

delaying the accumulate-coded information bits; and

adding the interleaved information bits and the delayed accumulate-coded information bits to generate regular RA-coded information bits.

20. The method of claim 19 , wherein in said adding the interleaved information bits and the delayed accumulate-coded information bits to generate regular RA-coded information bits,

modulo-2 addition operation of the delayed accumulate-coded information bits and the interleaved information bits is performed.