Spectrum spread communication system

A technology of spread spectrum communication and spread spectrum code, which is applied in the field of communication systems, can solve problems such as the reduction of transmission efficiency, and achieve the effect of preventing abnormal communication and high reliability
CN102939722AActive Publication Date: 2013-02-20NAT INST OF ADVANCED IND SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAT INST OF ADVANCED IND SCI & TECH
Publication Date
2013-02-20

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Abstract

Disclosed is a spectrum spread communication system which is hardly influenced by a noise, and can identify a frame structure at the reception side if a frame synchronization signal is not transmitted. A spread code generator (42) switches spread codes (Scai, Scbi) for each frame, and outputs to a spread / modulation unit (41). The spread / modulation unit (41) spreads and modulates transmission data and transmits to a direct current power line (2). A reference code generator (44) generates reference codes (Scai, Scbi) at the same code phase. Spread / demodulation units (43a, 43b) spread and demodulate the received signal using the reference codes (Scai, Scbi), and output to a selection unit (47). A frame synchronization detection unit (46) identifies a frame structure on the basis of the switching of synchronization states of the code phase in a code phase synchronization detection unit (45). The selection unit (47) outputs reception data by selecting the spread / demodulated data output from the phase-synchronized spread / demodulation unit among the spread / demodulation units (43a, 43b).
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Description

technical field

[0001] The present invention relates to a communication system for spreading and modulating transmission data in a frame structure. Background technique

[0002] Figure 7 It is a block configuration diagram showing a conventional solar power generation system.

[0003] In the figure, 1a to 1f are solar panels, 2a to 2f are DC power lines, and 3 is a power conditioner. The solar cell panels 1a to 1f are plate-shaped products that obtain required voltage and current by connecting a plurality of solar cells in series and parallel, and are also called solar cell modules.

[0004] A plurality of solar cell panels 1 a to 1 f are connected in series or in parallel via DC power lines 2 a to 2 f , and DC power generated by solar power in the solar cell panels 1 a to 1 f is supplied to loads via a power conditioner 3 . The DC power is converted into AC power by the power conditioner 3 .

[0005] Among the renewable energies introduced to realize a low-carbon societ...

Claims

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