Signal receiver, portable computer and signal acquisition method used in satellite communication system

A signal acquisition method used in a satellite communication system, wherein the signal acquisition method comprises:

• generating a first type code corresponding to a first type signal;
• generating a second type code corresponding to a second type signal and having a code length N-time longer than that of the first type code;
• generating a composite code by superimposing N successive first type codes on the second type code;
• correlating the composite code with a cell of a received signal to generate correlation results;
• and
• determining a type of the received signal according to the correlation results of the composite code with the received signal.

A portable computer used in a wireless communication system, wherein the portable computer comprises:

• an antenna for receiving a received signal;
• and
• a communication module comprising:
• a first type code generator for generating a first type code to corresponding to a first type signal;
• a second type code generator for generating a second type code corresponding to a second type signal and having a code length N-time longer than that of the first type code;
• a composite code generator for generating a composite code by superimposing N successive first type codes on the second type code;
• a correlation module for correlating the composite code with a received signal;
• and
• a determining module for determining a type of the received signal according to correlation results of the composite code with the received signal.