Transmission signal generating/detecting method by using code sequences, communication system using the same and measurement system using the same

A technology for transmitting signals and detecting methods, which is applied in the field of measurement systems and can solve the problems of difficult transmission speed, difficulty in detecting M-ary signals, and inability to obtain sufficient expansion rate.
CN103609047AInactive Publication Date: 2014-02-26NIPPON TECHNO RESOURCES
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NIPPON TECHNO RESOURCES
Publication Date
2014-02-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a transmission method which generates and sends a transmission signal generated from a multiplexing OFDM signal or a multiplexing wavelet-OFDM signal employing a multiplexing-spread chip sequence in which a chip of a code sequence for spread and a code sequence for combination, and a chip of a code sequence for localization are multiplied and multiplexed, and a receiving method which makes a high SN ratio improvement rate possible by converting the received signal to a frequency domain to acquire the multiplexing-spread chip sequence and by performing de-spreading and localizing processing to detect a localized pulse. According to the data transmission using the transmission and receiving method, data is mapped into a code sequence, and the receiving side can detect the data as the kind of code sequence, the shift time of a localized pulse and the polarity at a high SN ratio improvement rate. Further, when used in a measuring system, the transmission and receiving method can obtain information associated with an object to be measured on the basis of the aspect and the characteristics of a localized pulse by calculating the localized pulse from a signal detected from the object to be measured at a high SN ratio improvement rate.
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Description

technical field

[0001] The present invention relates to a transmission signal generation / detection method using a code sequence, a communication system using the method, and a measurement system using the method. Background technique

[0002] In order to build a smart grid, etc., a communication method that realizes high-speed, high-quality communication in the presence of strong noise and obstacles is required. At present, the Direct-Sequence Spread Spectrum (DS-SS, Direct-Sequence Spread-Spectrum) method has been disclosed, which is a communication method with excellent anti-noise characteristics and capable of realizing multiple access. However, although this method can pass De-spreading and removing narrow-band noise superimposed on the transmission signal in such a way that communication is performed outside the bandwidth improves the SNR, but it has a problem that it cannot improve the SNR of broadband noise (Non-Patent Document 1 ,2).

[0003] The following transmis...

Claims

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