Apparatus and method for performing coding and rate matching in a CDMA mobile communication system

A transmitter for use in a mobile communication system including an encoder for encoding a stream of information bits and generating a stream of systematic bits and a plurality of streams of parity bits, and a processor for providing plurality of parameters for rate matching to zero (0) a difference determined by subtracting the total number of the systematic bits and the parity bits generated by the encoder from the total number of bits to be transmitted over a radio channel for the given transmission period, comprising:

• a rate matcher, coupled to the encoder and processor, for if the difference is a negative value, non-uniformly puncturing bits corresponding to the difference in the streams of the parity bits without puncturing the stream of the systematic bits, and if the difference is a positive value, non-uniformly repeating bits corresponding to the difference in the stream of the systematic bits and the streams of the parity bits.

A transmission method in a mobile communication system including an encoder for encoding a stream of information bits and generating a stream of systematic bits and a plurality of streams of parity bits, and a processor for providing plurality of parameters for rate matching to zero (0) a difference determined by subtracting the total number of the systematic bits and the parity bits generated by the encoder from the total number of bits to be transmitted over a radio channel for the given transmission period, comprising the steps of:

• upon receiving a puncturing request based on the difference, puncturing each of the streams of the parity bits by a almost equal number of bits without puncturing the stream of the systematic bits, thereby puncturing as many bits as the difference;
• and
• upon receiving a repetition request based on the difference, repeating the stream of the systematic bits and the streams of the parity bits by the almost equal number of bits, thereby repeating as many bits as the difference.

A transmission method in a mobile communication system including an encoder for encoding a stream of information bits and generating the stream of systematic bits and a plurality of streams of parity bits, and a processor for providing plurality of parameters for rate matching to zero (0) a difference determined by subtracting the total number of the systematic bits and the parity bits generated by the encoder from the total number of bits to be ransmitted over a radio channel for the given transmission period, comprising the steps of:

• upon receiving a puncturing request based on the difference, puncturing the streams of the parity bits by a non-equal number of bits without puncturing the stream of the systematic bits, thereby puncturing as many bits as the difference;
• and
• upon receiving a repetition request based on the difference, repeating the stream of the systematic bits and the streams of the parity bits by the non-equal number of bits, thereby repeating as many bits as the difference.

A transmitter for use in a mobile communication system including an encoder for encoding a stream of information bits to generating a stream of systematic bits and a plurality of streams of parity bits as a coded bits, the transmitter comprising:

• a processor for providing plurality of parameters for rate matching to zero (0) a difference determined by subtracting the total number of the systematic bits and the parity bits generated by the encoder from the total number of bits to be transmitted over a radio channel for the given transmission period;
• a rate matcher, coupled to the encoder and the processor, for if the difference is a negative value, puncturing almost equal number of bits corresponding to the difference in the each streams of the parity bits without puncturing the stream of the systematic bits based on the parameters.