초록 ▼

In the CDMA Radio Multiplex Transmission, transfer function of line is inferred by using common pilot signal and synchronous detection is performed accordingly. The transmitting end transmits by periodically inserting pilot symbols into one channel only of multiplexed channels. The receiving end inf

In the CDMA Radio Multiplex Transmission, transfer function of line is inferred by using common pilot signal and synchronous detection is performed accordingly. The transmitting end transmits by periodically inserting pilot symbols into one channel only of multiplexed channels. The receiving end infers line condition (transfer function) from the received pilot symbols and, on the basis of the information thus obtained, performs synchronous detection of each channel multiplexed.

대표청구항 ▼

[ What is claimed is:] [1.] A transmitting device for executing radio communication by using a direct sequence CDMA system, comprising:means for separating transmitting date into a plurality of channels;means for periodically inserting a pilot symbol into one of many channels including said pluralit

[ What is claimed is:] [1.] A transmitting device for executing radio communication by using a direct sequence CDMA system, comprising:means for separating transmitting date into a plurality of channels;means for periodically inserting a pilot symbol into one of many channels including said plurality of channels of said transmitting data;means for spreading to each channel by spreading codes assigned to the transmitting data separated into said plurality of channels and the pilot symbols;means for multiplexing the spread transmitting data and each signal of the pilot symbols; andmeans for radio transmitting the multiplexed signals,wherein data transmission is not executed by another of said plurality of channels, in a transmitting period of said pilot symbol.