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Method for estimating signal intensity of EOC system terminal receiver

A technology for receiving signal strength and signal strength, applied in transmission systems, transmission monitoring, electrical components, etc., can solve problems such as difficulty in carrying and large volume of instruments, and achieve the effect of facilitating construction and maintenance

Inactive Publication Date: 2013-05-01
BEIJING LHWT MICROELECTRONICS
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to propose a method for estimating the signal strength of an EOC system terminal receiver in view of the defect that professional receiver receiving signal strength testing instruments in the prior art are bulky and difficult to carry. The method is easy to operate and has the advantages of higher accuracy

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  • Method for estimating signal intensity of EOC system terminal receiver

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] figure 1 It is a flow chart of the method for estimating the signal strength of the EOC system terminal receiver of the present invention. Since the EOC central office transmitter uses a fixed time slot and a low rate mode (generally 802.11b 1M mode) to send broadcast beacon (Beacon) frames, the frame power and rate are relatively stable, so this method uses the central office received by the terminal receiver The received signal strength RSSI of the Beacon frame is used as the basic basis.

[0023] Using the principle of automatic gain control, assuming that the terminal receiver has two receiving gain sections, high and low, the receiver is evenly set to 6 gain values ​​of AL1, AL2, AL3, AH1, AH2 and AH3 in the gain section from low to high, where AL1 to AL3 are in the low-gain section, and AH1 to AH3 are in the high-gain s...

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Abstract

The invention discloses a method for estimating signal intensity of an EOC system terminal receiver, wherein, the method is simply operated and has high accuracy. Firstly, received signal intensity RSSI of a central-office-end broadcast beacon frame which is received by the receiver is collected in the case of totally different gains, and the average value RSSIS average of the received signal intensity RSSI is calculated; then, the RSSIS average is converted to take dBm as the unit; and then, according to a least-square polynomial curve fitting functional expression y(x)=f(a, x)=a1xn plus a2xn-1 plus anx plus an+1, the signal intensity PX-POWER of the terminal receiver is determined, wherein, the coefficient an is determined according to the function (a, S)=polyfit(x, y, n) of a Matlab tool. According to the method, direct embedment into a relevant software and a relative apparatus of an EOC terminal apparatus is carried out, and no professional instrument or meter for displaying the received signal intensity is required, therefore, transport and maintenance staff can conveniently establish and maintain an EOC network.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to a method for estimating the signal strength of an EOC system terminal receiver. Background technique [0002] The HFC (Hybrid Fiber Coaxial) network uses fiber optics to reach the service area, and coaxial cables are used for the "last 100M" entering the user. The cable TV network is the most typical HFC network, which makes use of the current advanced and mature technology reasonably and effectively, and provides traditional analog broadcast TV programs with higher quality and more channels. However, due to the broadcast transmission of analog TV programs, the traditional HFC network does not have an uplink return channel. In order to meet the needs of digital TV on demand and high-bandwidth broadband access, the original network must be bidirectional remodel. There are more than 100 million cable TV network users in the country, and there are a large number of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00H04B17/318
Inventor 郑静吴南健寿国梁
Owner BEIJING LHWT MICROELECTRONICS
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