Forward link device of multicarrier communication system and method for realizing the same

A method for realizing a forward link of a CDMA (Code Division Multiple Access) communication system which outputs multicarrier transmission signals on each channel of the communication system, comprising the steps of:

• encoding transmission data of at least two different rates with a predetermined coding rate to generate symbols of respective rates;
• repeating full rate symbols such that a number of encoded symbols for each input data bit are at least twice the number of carriers, and repeating symbols of the other rates such that the symbols of the other rates are equal in number to the full rate symbols;
• and
• interleaving the repeated symbols such that the encoded symbols of the same input data bit are uniformly distributed among the carriers.

A method for realizing a forward link of a CDMA (Code Division Multiple Access) communication system which outputs multicarrier transmission signals on each channel of the communication system, comprising the steps of:

• encoding transmission data of a plurality of rates with a predetermined coding rate such that a number of full rate encoded symbols for each input data bit is at least twice a number of carriers;
• repeating symbols such that the symbols of each rate is equal in number to the full rate symbols;
• and
• interleaving the repeated symbols such that the encoded symbols of the same input data bit are uniformly distributed among the carriers.

A forward link device of a CDMA communication system which outputs multicarrier transmission signals on each channel of the communication system, the forward link comprising:

• a plurality of encoders for encoding input data of corresponding rates into symbols with corresponding coding rates, respectively;
• a plurality of repeaters including a first repeater for repeating full rate symbols and other repeaters for repeating symbols of other rates, wherein the first repeater repeats the full rate symbols such that the number of the full rate encoded symbols for each input data bit is at least twice the number of carriers, wherein the other repeaters repeat the symbols output from the corresponding encoders to be equal in number to the full rate symbols;
• and
• a plurality of interleavers for interleaving the repeated symbols to uniformly distribute the encoded symbols of the same input data bit output from the repeaters among the carriers.

A forward link device of a CDMA communication system which outputs multicarrier transmission signals on each channel of the communication system, the forward link comprising:

• encoders for encoding input data of corresponding rates into symbols with a corresponding coding rate, respectively, the coding rate being determined such that the number of full rate encoded symbols for each input data bit is at least twice the number of carriers;
• repeaters for repeating symbols output from the corresponding encoders to be equal in number to the full rate symbols;
• and
• interleavers for uniformly distributing the repeated symbols of the same input data bit among the carriers.

A forward link device of a multicarrier CDMA communication system outputting multicarrier transmission signals on each channel of the communication system by overlaying three carriers extending over 5 MHz on same frequency bands as an IS-95 system, the forward link comprising:

• first to fourth encoders for encoding input data of corresponding rates with a 1/3 coding rate, respectively;
• a plurality of repeaters including a first repeater for repeating each input data two times full rate symbols output from the first encoder and second to fourth repeaters for repeating each of the input symbols output from the second to fourth encoders, respectively, to match the number of corresponding output symbols to the number of full rate symbols;
• and
• first to fourth interleavers for interleaving the repeated symbols output from the first to fourth repeaters, respectively, to uniformly distribute the encoded symbols of the same input data bit among the carriers.

A forward link device of a multicarrier CDMA communication system outputting multicarrier transmission signals on each channel of the communication system by overlaying three carriers extending over 5 MHz on same frequency bands as an IS-95 system, the forward link comprising:

• first to fourth encoders for encoding input data of first to fourth rates with a 1/6 coding rate, respectively;
• first to fourth for repeating symbols output from the second to fourth encoders, respectively, to match the number of corresponding output symbols to the number of full rate symbols output from the first encoder;
• and
• first to fourth interleavers for interleaving the repeated symbols output from the first encoder and the second to fourth repeaters, respectively, to uniformly distribute the encoded symbols for each input data bit among the carriers.

A base station system transmitting information data to a mobile station through multiple transmitting carrier frequencies on each channel of the communication system, the system comprising:

• a channel encoder for encoding the information data to a plurality of encoded symbols;
• an interleaver, coupled to the channel encoder, for interleaving the encoded symbols;
• and
• a demultiplexer, coupled to the interleaver, for distributing the encoded symbols output from the interleaver to the multiple transmitting carrier frequencies, wherein encoded symbols corresponding to each information bit are uniformly distributed among each of the multiple transmitting carrier frequencies.