Apparatus and method for transmitting and receiving data in a CDMA communication system

A channel transmission apparatus in a CDMA system, comprising:

• channel transmitters of a first system, including common channels and dedicated channels;
• channel transmitters of a second system, including data channels having data rate higher than a data rate of the first system;
• an orthogonal code assignor including a table comprised of orthogonal codes to be assigned to the channels of the first system and orthogonal codes to assigned to the second system, wherein Walsh codes assigned to the first system are Walsh codes with a length of m chips, taking as a root at least two of 4-chip Walsh codes of W04=0000, W14=0101, and W34=0110, and Walsh codes assigned to the second system are Walsh codes with a length less than m chips, taking as a root the remaining 4-chip Walsh codes excepting said 4-chip Walsh codes used in the first system;
• and
• a controller for controlling the orthogonal codes assignor according to assigned channel information and applying the assigned Walsh codes to the channel transmitters of the first and second systems.

A channel transmission apparatus in a CDMA system, comprising:

• channel transmitters of a second system, including common channels and dedicated channels;
• channel transmitters of a second system, including data channels having a data rate higher than a data rate of the first system;
• an orthogonal code assignor including a table comprised of orthogonal codes to be assigned to the channels of the first system and orthogonal codes to be assigned to the second system, wherein Walsh codes assigned to the first system are Walsh codes with a length of m chips, taking as a root a specified one of 4-chip Walsh codes of W04=0000, W14=0101, W24=0011 and W34=0110, and the Walsh codes assigned to the second system are Walsh codes with a length of below m chips, taking as a root the remaining 3 4-chip Walsh codes excepting said 4-chip Walsh code used in the first system;
• and
• a switch controller for controlling the orthogonal code assignor according to assigned channel information and applying the assigned Walsh codes to the channel transmitters of the first and second systems.

A channel receiving apparatus in a CDMA system, comprising:

• channel receivers of a first system, including common channels and dedicated channels;
• channel receivers of a second system, including data channels having a data rate higher than a data rate of the first system;
• an orthogonal code assignor including a table comprised of orthogonal codes to be assigned to the channels of the first system and orthogonal codes to be assigned to the second system, wherein Walsh codes assigned to the first system are Walsh codes with a length of m chips, taking as a root at least two of 4-chip Walsh codes of W04=0000, W14=0101, W24=0011 and W34=0110, and the Walsh codes assigned to the second system are Walsh codes with a length of below m chips, taking as a root the remaining 4-chip Walsh codes excepting said 4-chip Walsh code used in the first system;
• and
• a switch controller for controlling the orthogonal code assignor according to assigned channel information and applying the assigned Walsh codes to the channel receivers of the first and second systems.