eoc terminal and its working frequency band setting method
A working frequency band and terminal technology, applied in the field of communication, can solve the problems of high cost and difficulty of EoC terminal
Active Publication Date: 2021-06-15
南京金阵微电子技术有限公司
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Problems solved by technology
[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an EoC terminal and its operating frequency band setting method, which is used to solve the problem of the difficulty and high cost of realizing the EoC terminal working in multiple frequency bands in traditional solutions
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[0030] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
[0031] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...
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The present invention provides an EoC terminal and a method for setting its working frequency band. The EoC terminal includes: a first channel modulator, which uses the first intermediate frequency modulation frequency f1 to modulate the baseband frequency band whose center frequency is f0 into a baseband whose center frequency is f1-f0 The first intermediate frequency band and the first image intermediate frequency band whose center frequency point is f1+f0 use the second intermediate frequency modulation frequency f2 to modulate the baseband frequency band whose center frequency point is f0 into the second middle frequency band whose center frequency point is f2-f0 The frequency band and the center frequency point are the second image intermediate frequency band of f2+f0; the first bandpass filter obtains the first required intermediate frequency band; the second channel modulator utilizes the first high frequency modulation frequency f5 to convert the first The required intermediate frequency band is modulated into the first required high frequency band and the first required high frequency band of the image; the second bandpass filter outputs the required high frequency band of the first image after filtering. The present invention only needs two filters, which greatly saves the cost; moreover, the filter used in the present invention will not be difficult to realize as the modulation frequency increases, and is very convenient for market promotion.
Description
technical field [0001] The invention belongs to the technical field of communication, and relates to an EoC communication system, in particular to an EoC terminal and a method for setting a working frequency band thereof. Background technique [0002] EOC (Ethernet Over Cable) is an access technology based on the cable TV coaxial cable network using the Ethernet protocol. Its basic principle is to use specific medium conversion technology (mainly including impedance transformation, balanced / unbalanced transformation, etc.), to transmit data signals conforming to the 802.3 series standards through the home coaxial cable. This technology can make full use of the existing home-entry coaxial cable resources of the cable television network, and solve the access problem of the last 100m. [0003] In order to improve the bus access bandwidth of EoC and enhance the anti-interference capability of the system, the EoC headend usually needs to support multiple frequency points. Reali...
Claims
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IPC IPC(8): H04L12/28
Inventor 何润生韩坚
Owner 南京金阵微电子技术有限公司