SN ratio measurer of direct sequences pread spectrum signal

• Main Authors: JIANQIANG HU, YUEQUN WANG, HANGSHENG ZHAO
• Format: Patent
• Language: English
• Published: 01.12.2004
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; JAMMING OF COMMUNICATION; SECRET COMMUNICATION; TRANSMISSION

The utility model relates to a device for signal-to-noise ratio measurement of direct sequence spread spectrum (DSSS) received signal and existence determination of DSSS spread spectrum signal in received signal, in particular to a signal-to-noise measurement device for direct sequence spread spectrum. The utility model consists of two A/D converters (11), (12), a matched filter (13), a clock signal generator (14) and a digital signal processor (15). The input of the two A/D converters (11), (12) are respectively access to baseband simulating in-phase branch input signal I and baseband simulating quadrature branch input signal Q, the output of the two A/D converters (11), (12) are access to the input of the matches filter (13), the output of the matched filter (13) is access to the input of the digital signal processor (15), and the SNR parameter can be transported from the output of the digital signal processor (15) to finish signal-to-noise measurement; the output of the clock signal generator (14) is access to the clock input terminal of the two A/D converters (11), (12) and the synchronous signal control terminal of part of the matched filter (13) at the same time.