A channel controller generates a symbol distribution signal according to a predetermined symbol deleting matrix pattern, that is determined to distribute the symbols to the respective carriers. Symbol distributors (941-944) receive the symbol and distribute the received symbols to the carrier according to the symbol distribution signal. Channel encoders (931-934) such as convolutional encoder encodes the channel data to be transmitted into symbols at a specified coding rate of R = 1/6. Independent claims are also included for the following: (a) a channel transmission method for CDMA communication system; (b) a channel encoding device; (c) a channel encoding method for CDMA communication system.