초록 ▼

A wireless telecommunications systems (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication path is established from a transmitter (200) of the central terminal (10) to a receiver (202) of the subs

A wireless telecommunications systems (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication path is established from a transmitter (200) of the central terminal (10) to a receiver (202) of the subscriber terminal (20). A downlink signal (212) is transmitted from the transmitter (200) to the receiver (202) during setup and operation of the wireless telecommunications system (1). The receiver (202) of the subscriber terminal (20) compares a code and phase of a master code sequence that includes an orthogonal code in the downlink signal (212) to a code and phase of a slave code sequence of the receiver (202). The receiver (202) adjusts the phase of the slave code sequence until a match is obtained with the master code sequence. The receiver (202) monitors the downlink signal (212) to identify the frame alignment signal (232) and establishes the downlink communication path when two successive frame alignment signals (232) are identified. A channel identifier signal within the downlink signal is identified and used to identify the orthogonal code included in the master code sequence. The channel identifier signal is matched to a reference identifier code to verify that the correct downlink signal is being read.

대표청구항 ▼

[ What is claimed is:] [1.] A method of establishing a downlink communication path in a wireless telecommunications system, comprising the steps of:receiving a downlink signal having a master code sequence including an orthogonal code, wherein the downlink signal is received in an acquisition mode a

[ What is claimed is:] [1.] A method of establishing a downlink communication path in a wireless telecommunications system, comprising the steps of:receiving a downlink signal having a master code sequence including an orthogonal code, wherein the downlink signal is received in an acquisition mode at a first transmitting power and a first transmitting rate;adjusting a code and phase of a receiver slave code sequence in response to a code and phase of the master code sequence in order to recognize the downlink signal;searching for a frame alignment signal within the downlink signal;reading the downlink signal in response to finding two successive frame alignment signals;identifying a channel identifier signal within the downlink signal, the channel identifier signal identifying the orthogonal code included in the master code sequence;matching the channel identifier signal to a reference identifier code to verify that the correct downlink signal is being read;acquiring the downlink signal in response to a successful match.