Patent ID: 8139622
Filing Date: 2012-03-20
Classification: H04B,H04J

Abstract:
1. A system for generating and detecting an identifier sequence of a bandwidth-limited transmitter, comprising an identifier sequence generating portion and an identifier sequence detecting portion, wherein, the identifier sequence generating portion comprises: a frequency-domain random sequence generating device for generating a frequency-domain random sequence; a frequency-domain orthogonal sequence generating device for generating a frequency-domain orthogonal sequence; a frequency-domain truncating device for frequency-domain truncating the frequency-domain orthogonal sequence scrambled by the frequency-domain random sequence; a frequency-time transforming device for performing frequency-time domain transformation of the truncated frequency-domain sequence; a periodic extending device for performing periodic extension of the signal transformed into time-domain; the identifier sequence receiving portion comprises: a time-domain truncating device for performing time-domain truncation of the received signal; a time-frequency domain transforming device for performing time-frequency domain transformation of the truncated time-domain signal to obtain frequency-domain signal; a frequency-domain random sequence generating device for generating a frequency-domain random sequence; a frequency-domain orthogonal sequence generating device for generating a frequency-domain orthogonal sequence; a frequency-domain correlator for correlating the frequency-domain orthogonal sequence with the frequency-domain signal de-scrambled by the frequency-domain random sequence; and a threshold detecting device for detecting output of the frequency-domain correlator and determining the transmitter to which the identifier sequence belongs.