SYSTEM AND METHOD FOR GENERATING AND DETECTING THE IDENTIFIER SEQUENCE OF THE BANDWIDTH-LIMITED TRANSMITTER
First Claim
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.
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Abstract
A system and method for generating and detecting identifier sequence of a bandwidth-limited transmitter are disclosed, comprising an identifier sequence generating portion and a detection portion. The identifier sequence generating portion comprises: generating a frequency-domain random sequence; generating a frequency-domain orthogonal sequence; performing frequency-domain truncation; performing frequency-time transformation; and performing cycle extension. The identifier sequence receiving portion comprises: truncating the time-domain for the received signal; performing time-frequency domain transformation to obtain a frequency-domain signal; generating frequency-domain random sequence; generating a frequency-domain orthogonal sequence; correlating the frequency-domain orthogonal sequence with the frequency-domain signal de-scrambled by the frequency-domain random sequence; and detecting an output from a frequency-domain correlator by a threshold detecting device and determining the transmitter identifier sequence. The random sequence bandwidth generated by the system and the method of the present invention can be configured flexibly according to transmission bandwidth requirement, and the sequence may be arbitrarily allocated at the power of each frequency point inside the bandwidth. The present invention may be widely applied to multimedia broadcasting, terrestrial radio broadcasting, cable broadcasting and the like.
6 Citations
3 Claims
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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.
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2. A method of generating and detecting an identifier sequence of a bandwidth-limited transmitter, comprising a method of generating the identifier sequence and a method of detecting the identifier sequence, wherein
the method of generating the identifier sequence comprises: -
generating a frequency-domain random sequence by a frequency-domain random sequence generating device; generating a frequency-domain orthogonal sequence by a frequency-domain orthogonal sequence generating device; performing frequency-domain truncation to the frequency-domain orthogonal sequence scrambled by the frequency-domain random sequence with a frequency-domain truncating device; performing frequency-time domain transformation to the truncated frequency-domain sequence with a frequency-time transforming device to obtain a time-domain signal; performing periodic extension to the time-domain signal with a periodic extending device; the method of detecting identifier sequence comprises; performing time-domain truncation to the received signal with a time-domain truncating device; performing time-frequency domain transformation to the truncated time-domain signal with a time-frequency domain transforming device to obtain a frequency-domain signal; generating a frequency-domain random sequence by the frequency-domain random sequence generating device; generating frequency-domain orthogonal sequence by the frequency-domain orthogonal sequence generating device; correlating the frequency-domain orthogonal sequence with the frequency-domain signal de-scrambled by the frequency-domain random sequence with a frequency-domain correlator; and detecting the output of the frequency-domain correlator with a threshold detecting device and determining the transmitter identifier sequence. - View Dependent Claims (3)
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Specification