Signal receiver, portable computer and signal acquisition method used in satellite communication system
First Claim
1. A signal receiver used in a satellite communication system, wherein the signal receiver comprises:
- a first type code generator for generating a first type code 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,wherein when N repetitive peaks are found in the correlation results, the received signal is determined to comprise the first type signal and when a single peak is found in the correlation results, the received signal is determined to be the second type signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A signal receiver used in a satellite communication system is provided. The signal receiver comprises a first type code generator, a second type code generator, a composite code generator, a correlation module and a determining module. The first type code generator generates a first type code corresponding to a first type signal. The second type code generator generates 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. The composite code generator generates a composite code by superimposing N successive first type codes on the second type code. The correlation module correlates the composite code with a cell of a received signal to generate correlation results. The determining module determines a type of the received signal according to correlation results of the composite code with the received signal.
70 Citations
20 Claims
-
1. A signal receiver used in a satellite communication system, wherein the signal receiver comprises:
-
a first type code generator for generating a first type code 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, wherein when N repetitive peaks are found in the correlation results, the received signal is determined to comprise the first type signal and when a single peak is found in the correlation results, the received signal is determined to be the second type signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A signal acquisition method performed by 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, wherein when N repetitive peaks are found in the correlation results, the received signal is determined to comprise the first type signal and when a single peak is found in the correlation results, the received signal is determined to be the second type signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. 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 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, wherein when N repetitive peaks are found in the correlation results, the received signal is determined to comprise the first type signal and when a single peak is found in the correlation results, the received signal is determined to be the second type signal.
-
Specification