초록 ▼

A base station transmits, in addition to a pilot channel, signals which are multiplexed with pilot symbols inserted in the respective signals in communication channels. As the transmission of the pilot channel as a reference signal for coherent detection is unnecessary with high power so as to attai

A base station transmits, in addition to a pilot channel, signals which are multiplexed with pilot symbols inserted in the respective signals in communication channels. As the transmission of the pilot channel as a reference signal for coherent detection is unnecessary with high power so as to attain high reliability, the pilot channel can be transmitted with low power by means of weight in comparison with the communication channel, so that interference with the communication channel of any other station is reduced. Moreover, accurate coherent detection can be made from the pilot symbol inserted in the communication channel on the mobile station side.

대표청구항 ▼

[ What is claimed is:] [1.] A CDMA cellular radio transmission system using a direct spread CDMA method, comprising a base station which comprises pilot channel output means for outputting a pilot channel, communication channel output means for outputting communication channels with a pilot symbol i

[ What is claimed is:] [1.] A CDMA cellular radio transmission system using a direct spread CDMA method, comprising a base station which comprises pilot channel output means for outputting a pilot channel, communication channel output means for outputting communication channels with a pilot symbol inserted therein, and transmitting means for multiplexing the pilot channel and the communication channels at the same frequency and transmitting the combination of the multiplexed pilot channel and the communication channels.