초록 ▼

In CDMA communications, a base station detects a difference between a reference phase of a spreading code and a phase of a received signal of each terminal station, and feeds a phase jump signal PJ-i representative of the phase difference back to each terminal station. After timing acquisition, the

In CDMA communications, a base station detects a difference between a reference phase of a spreading code and a phase of a received signal of each terminal station, and feeds a phase jump signal PJ-i representative of the phase difference back to each terminal station. After timing acquisition, the reception operation is performed using the reference phase, and a shift amount between the phase of a received signal and the reference phase is fed back to each terminal station as phase synchronization control information PC-i. Each terminal station coarsely adjusts the phase of the spreading code in accordance with the phase jump signal PJ-i, and thereafter finely adjusts the phase of its transmitting signal in accordance with the phase synchronization control information PC-i. It is therefore possible to synchronize the phases of the signals transmitted from terminal stations and received at the base station. Accordingly, an orthogonal code is used for spreading on the reverse links.

대표청구항 ▼

[ What is claimed is:] [4.] A terminal station for performing communication with a base station, comprising:a spreading code generator which generates a spreading code assigned to the terminal station and having a phase set in accordance with a first difference information transmitted from the base

[ What is claimed is:] [4.] A terminal station for performing communication with a base station, comprising:a spreading code generator which generates a spreading code assigned to the terminal station and having a phase set in accordance with a first difference information transmitted from the base station, wherein the first difference information indicates a difference on the timing acquisition between a reference and the first spectrum spreading signal which is transmitted from each terminal station and received by the terminal station;a modulator which spreads a transmitting data with the generated spreading code; anda delay circuit which adjusts a phase of the spreading code of a spectrum spreading signal spread by the modulator in accordance with a second difference information transmitted from the base station, wherein the second difference information indicates a difference during tracking between the reference phase and a second spectrum spreading signal which is transmitted from each terminal station and received by the base station.