CN103001710A - A smart antenna signal strength measurement system and measurement method - Google Patents

Abstract

The invention discloses a system for measuring the signal strength of an intelligent antenna, which includes a PC, a measuring node and a coordinator for connecting the measuring node and the PC, and the measuring node includes a TD-SCDMA for receiving and measuring the signal strength of a base station module, a processor for control and data processing, a Zigbee module for communication and data transmission, and a GPS module for synchronization and positioning, and the TD-SCDMA module, GPS module, and Zigbee module are respectively connected to the processor . The invention induces the base station to communicate with the measurement node through the measurement node, and the measurement node monitors the signal strength of the base station; multiple measurement nodes are reasonably arranged, and a measurement network is formed through the Zigbee module to realize simultaneous measurement of multiple points. The measurement node equipment is small in size, does not need to be moved and is cheap.

Description

A smart antenna signal strength measurement system and measurement method

technical field

The invention relates to a signal strength measuring system and a measuring method, in particular to a smart antenna signal strength measuring system and a measuring method.

Background technique

With the rapid development of the third-generation mobile communication system, my country's TD-SCDMA system has also achieved considerable development. Since smart antennas can resist multipath fading and reduce delay expansion, smart antennas support high data rates, suppress interference, and reduce near-far Effect, reduce outage probability, improve BER (Bit Error Rate) performance, increase system capacity, improve spectrum efficiency, support flexible and effective handover, expand cell coverage, flexible cell management, extend mobile station battery life, and maintain and low operating costs, so the existing base station antennas will use smart antennas for communication architecture, so the strength of the smart antenna is used instead of the signal strength of the base station in the following description. Due to the increase in the coverage of base stations (many residents have base stations on the roof), the impact of base station electromagnetic radiation on the human body has gradually become a hot spot of concern. How to qualitatively and quantitatively judge the electromagnetic radiation pollution of smart antennas is a problem to be solved. Due to the special working principle of the smart antenna, the smart antenna enables the base station to use the service beam to establish a call link with the user on the downlink, and due to the randomness of the user's location, the time interval of each beamforming of the smart antenna is 5ms. When measuring the signal strength of the TD-SCDMA base station, among the existing third-generation communication base station signal strength measuring instruments, the signal strength measurement for the smart antenna is only a part of its function, and the equipment is expensive. Therefore, when only measuring the signal strength value of the smart antenna, most TD-SCDMA base station measurements still generally use the measurement equipment used to measure the second generation communication system, that is, the measurement equipment of the spectrum analyzer plus the field strength meter. However, in actual measurement, the measurement equipment needs to be transported to the next measurement point in turn for measurement, and the measurement equipment of the spectrum analyzer plus the field strength meter is large and difficult to move quickly, so the measurement method of the spectrum analyzer plus the field strength meter is complicated and difficult to operate .

Contents of the invention

The purpose of the present invention is to provide a smart antenna signal strength measurement system to measure the signal strength of the base station.

A further object of the present invention is to provide a system for measuring the signal strength of an intelligent antenna to realize multi-point and simultaneous measurement of the signal strength of a base station.

A further object of the present invention is to provide a method for measuring the signal strength of a smart antenna.

The present invention adopts following technical scheme:

A kind of intelligent antenna signal strength measurement system, comprises PC, measurement node and the coordinator that is used to connect measurement node and PC, and described measurement node comprises the TD-SCDMA module that is used for receiving and measuring base station signal strength, is used for A processor for control and data processing, a wireless data transmission module for communication and data transmission, and a GPS module for synchronization and positioning, and the TD-SCDMA module, GPS module, and wireless data transmission module are respectively connected to the processor .

There are multiple measurement nodes, and the multiple measurement nodes form a measurement network through the wireless data transmission module, and are used for simultaneous multi-point measurement of the base station.

The setting mode of described a plurality of measurement nodes is: in order to reduce the signal influence that the refraction of ground and reflection bring, make measurement node distance ground-setting height, take the central point of TD-SCDMA base station as the center, utilize the smart antenna The downtilt angle value and the vertical height value from the top of the base station to the horizontal plane where the measurement node is located calculate the distance between the measurement center point and the base station center point, so as to determine the position of the measurement center point, and ensure that the point is not blocked to measure the center point and antenna Draw a straight line on the projection line of any point on the ground, use this straight line as the main lobe, and set a side lobe every 30 degrees on both sides, the main lobe and all side lobes are combined into a semicircle, and the main lobe and side lobes are respectively set with The measurement nodes are arranged at equal intervals from the central point, and the number of measurement nodes on the main lobe is three times that of the measurement nodes on the side lobes.

The processor is an ARM processor.

The wireless data transmission module is a Zigbee module.

A measuring method of a smart antenna signal strength measuring system, comprising the following steps:

A: According to the location of the base station, reasonably arrange the measurement nodes around the base station; the measurement nodes include a TD-SCDMA module for receiving and measuring the signal strength of the base station, a processor for control and data processing, and a processor for communication and data The wireless data transmission module for transmission and the GPS module for synchronization and positioning, the TD-SCDMA module, the GPS module, and the wireless data transmission module are respectively connected with the processor.

B: Make the TD-SCDMA module, wireless data transmission module and GPS module work, debug each module to make each module enter the normal working state;

C: The processor controls the work of the TD-SCDMA module, so that the TD-SCDMA module communicates with the base station;

D: The processor controls the GPS module to locate the position of the measuring node synchronously, and simultaneously the processor controls the measuring node to measure the signal strength of the position, and sends the measured signal strength to the PC through the coordinator;

E: The PC analyzes and processes the measured signal strength data.

There are multiple measurement nodes, and the multiple measurement nodes form a measurement network through the wireless data transmission module, and are used for simultaneous multi-point measurement of the base station.

The setting mode of described a plurality of measurement nodes is: in order to reduce the signal influence that the refraction of ground and reflection bring, make measurement node distance ground-setting height, take the central point of TD-SCDMA base station as the center, utilize the smart antenna The downtilt angle value and the vertical height value from the top of the base station to the horizontal plane where the measurement node is located calculate the distance between the measurement center point and the base station center point, so as to determine the position of the measurement center point, and ensure that the point is not blocked to measure the center point and antenna Draw a straight line on the projection line of any point on the ground, use this straight line as the main lobe, and set a side lobe every 30 degrees on both sides, the main lobe and all side lobes are combined into a semicircle, and the main lobe and side lobes are respectively set with The measurement nodes are arranged at equal intervals from the central point, and the number of measurement nodes on the main lobe is three times that of the measurement nodes on the side lobes.

The processor is an ARM processor.

The wireless data transmission module is a Zigbee module.

The present invention uses the TD-SCDMA module, the wireless data transmission module, the GPS module and the microprocessor to form the measurement node, the measurement node induces the base station to communicate with the measurement node, and the measurement node monitors the signal strength of the base station; multiple measurement nodes are arranged reasonably , A measurement network is formed through the Zigbee module, and at the same time, the positioning is performed through the GPS module, so that simultaneous measurement of multiple points can be realized. The measurement node sends the monitored data value to the PC in real time through the coordinator, and the PC performs analysis, processing and display. The measurement node equipment is small in size, does not need to be moved and is cheap.

Description of drawings

Fig. 1 is a block diagram of circuit principle of the present invention;

Fig. 2 is the circuit schematic block diagram of measuring node of the present invention;

Fig. 3 is a distribution diagram of the arrangement of measurement nodes according to the present invention.

Detailed ways

As shown in Figure 1 and Figure 2, a smart antenna signal strength measurement system includes a PC, a measurement node and a coordinator for connecting the measurement node and the PC, and the measurement node includes a Intensive TD-SCDMA module, processor for control and data processing, wireless data transmission module for communication and data transmission and GPS module for synchronization and positioning, the TD-SCDMA module, GPS module, wireless The data transmission modules are respectively connected with the processor; since the TD-SCDMA module has three modes of call, standby and flight, it is possible to establish different modes of communication between the TD-SCDMA module and the base station under the control of the processor, and record in real time at the same time Signal strength values under different communication states, the collected signal strength values are transmitted to the coordinator through the Zigbee module, and the coordinator sends the data to the PC for analysis, processing and display.

The processor is an ARM processor. The ARM processor itself is small in size and low in cost. It can control the actions of each module of the measurement node, and can also control the synchronization and communication of signals between each node, and transmit data to the PC.

The wireless data transmission module is a Zigbee module. The Zigbee module sends the data value collected by the measurement node to the PC under the control of the ARM processor through wireless transmission.

There may be multiple measurement nodes. Multiple measurement nodes are arranged reasonably, and a Zigbee network for wireless testing is constructed through the Zigbee modules in multiple measurement nodes. The data communication and transmission between them, and use the GPS module to realize the communication synchronization and positioning between multiple measurement nodes.

As shown in Fig. 3, the described setting method to a plurality of measurement nodes is: in order to reduce the influence of the refraction and reflection of the ground on the signal measurement, the measurement node is set to be 2m away from the ground height, and the central point of the TD-SCDMA base station is Center, use the downtilt angle value of the smart antenna and the vertical height value from the top of the base station to the horizontal plane where the measurement node is located to calculate the distance between the measurement center point and the base station center point through the Pythagorean theorem, so as to determine the position of the measurement center point and ensure that the point Without being blocked, draw a straight line with the projection line of the measurement center point and any point of the antenna on the ground, use this straight line as the main lobe, set a side lobe every 30 degrees on both sides, and finally combine them into a semicircle, between the main lobe and The measurement nodes on the side lobe are arranged at an equal distance from the central point, and the number of measurement nodes on the main lobe is three times that of the measurement nodes on the side lobe. In this way, the measurement nodes can be arranged according to the known distribution of signal strength, and the measurement nodes are no longer arranged at positions where there is basically no signal, thereby saving labor and measurement costs.

When the present invention works, a single measurement node can be used to communicate with the base station, and the signal strength value of the single measurement node can be measured; it can also be reasonably distributed and set by multiple measurement nodes, simulating the location and location of the communication point when a single or multiple users talk. The signal radiation strength value and change value of its surrounding position, so as to realize the real-time measurement and multi-point measurement of the signal strength value.

A measuring method of a smart antenna signal strength measuring system, comprising the following steps:

A: According to the location of the base station, reasonably arrange the measurement nodes around the base station; due to the reasonable distribution of the signal strength and size distribution of the smart antenna of the base station, this saves measurement costs;

B: Make the TD-SCDMA module, Zigbee module and GPS module work, debug each module to make each module enter the normal working state;

C: The processor controls the work of the TD-SCDMA module, so that the TD-SCDMA module communicates with the base station; that is, the processor actively sends signals on the system downlink channel of the TD-SCDMA network to induce the TD-SCDMA base station to communicate with the measurement The node establishes a call link, and after the call link is established, the processor measures the signal strength in call, standby and flight mode respectively;

D: The processor controls the GPS module to synchronously locate the positions of multiple measurement nodes, and distinguishes the working status data of each node. At the same time, the processor controls the Zigbee network to measure the signal strength of each measurement node, and coordinates the measured signal strength values through the value sender to PC;

E: The PC collects, analyzes and processes the measured signal strength data, and finally can intuitively understand the simultaneous measurement of a single measurement node or multiple measurement nodes, and the simultaneous measurement of a single measurement node or multiple measurement nodes in different states When measuring the signal strength of each measurement node in the network, that is, the radiation strength value.

The above-mentioned step A is specifically: in order to reduce the signal influence brought by the refraction and reflection of the ground, the measurement node is set at a certain height from the ground (for example, 2m), and the projection point of the top of the TD-SCDMA base station on the ground is the center of the base station. Use the downtilt angle value of the smart antenna and the vertical height value from the top of the base station to the horizontal plane where the measuring node is located to calculate the distance between the measuring center point and the center of the base station through the Pythagorean theorem, so as to determine the position of the measuring center point and ensure that the point is not outside Object occlusion: A straight line is drawn from the projection line of the measurement center point and any point of the antenna on the ground, and the straight line is used as the main lobe, and a side lobe is set every 30 degrees on both sides, and the main lobe and all side lobes are combined into a semicircle. On the main lobe and the side lobe, the measurement nodes are arranged at equal intervals starting from the measurement center point, so that the signals around the base station can be simulated and quantified. The number of measurement nodes on the main lobe is three times that of the measurement nodes on the side lobe, which is convenient Signal Acquisition.

The measurement method of the smart antenna signal strength measurement system is to arrange multiple measurement nodes according to the signal strength distribution of the smart antenna. The user measures and monitors the radiation intensity value of the base station when it is working in different working states (starting, shutting down, and talking), providing a convenient and fast measurement method for base station radiation protection measurement and smart antenna signal strength measurement.

Claims (10)

1. smart antenna signal strength measurement system, it is characterized in that: comprise PC, measured node and be connected connecting the telegon of measured node and PC, described measured node comprises for the TD-SCDMA module that receives and measure base station signal strength, be used for processor that control and data process, be used for communicate by letter and the wireless data transfer module of transfer of data and being used for synchronously and the GPS module of locating, and described TD-SCDMA module, GPS module, wireless data transfer module are connected with processor respectively.

2. smart antenna signal strength measurement according to claim 1 system, it is characterized in that: described measured node is a plurality of, a plurality of measured node form by wireless data transfer module measures network, is used for that multiple spot is carried out in the base station and measures simultaneously.

3. smart antenna signal strength measurement according to claim 2 system, it is characterized in that: the set-up mode of described a plurality of measured node is: the effect of signals of bringing for the refraction that reduces ground and reflection, make measured node apart from ground one setting height, centered by the central point of TD-SCDMA base station, utilize the angle of declination angle value of smart antenna and the top, base station calculates measuring center point and base station center point to the vertical height value of measured node place horizontal plane distance, thereby determine the position of measuring center point, and guarantee that this point is not blocked, make straight line with measuring center point and antenna arbitrfary point at the projection line on ground, with this straight line as main lobe, per 30 degree arrange a secondary lobe to both sides respectively, main lobe and all secondary lobes are combined as a semicircle, on main lobe and secondary lobe respectively with from central point uniformly-spaced distance carry out the layout of measured node, measured node quantity is 3 times of measured node on the secondary lobe on the main lobe.

4. smart antenna signal strength measurement according to claim 3 system, it is characterized in that: described processor is arm processor.

5. smart antenna signal strength measurement according to claim 4 system, it is characterized in that: described wireless data transfer module is the Zigbee module.

6. the method for measurement of a smart antenna signal strength measurement system is characterized in that: may further comprise the steps:

A: according to the position of base station, in the base station around the reasonable Arrangement measured node; Described measured node comprises for the TD-SCDMA module that receives and measure base station signal strength, be used for processor that control and data process, be used for communicate by letter and the wireless data transfer module of transfer of data and being used for synchronously and the GPS module of locating, and described TD-SCDMA module, GPS module, wireless data transfer module are connected with processor respectively;

B: make TD-SCDMA module, wireless data transfer module and the work of GPS module, the debugging modules makes modules enter normal operating conditions;

C: the work of processor control TD-SCDMA module communicates TD-SCDMA module and base station;

D: the position of the synchronous location survey node of processor control GPS module, the signal strength signal intensity of simultaneous processor control survey node measurement present position, and a signal strength signal intensity that records sends to PC by telegon;

The E:PC machine is analyzed, is processed the signal strength data that records.

7. smart antenna signal strength measurement according to claim 6 system, it is characterized in that: described measured node is a plurality of, a plurality of measured node form by wireless data transfer module measures network, is used for that multiple spot is carried out in the base station and measures simultaneously.

8. smart antenna signal strength measurement according to claim 7 system, it is characterized in that: the set-up mode of described a plurality of measured node is: the effect of signals of bringing for the refraction that reduces ground and reflection, make measured node apart from ground one setting height, centered by the central point of TD-SCDMA base station, utilize the angle of declination angle value of smart antenna and the top, base station calculates measuring center point and base station center point to the vertical height value of measured node place horizontal plane distance, thereby determine the position of measuring center point, and guarantee that this point is not blocked, make straight line with measuring center point and antenna arbitrfary point at the projection line on ground, with this straight line as main lobe, per 30 degree arrange a secondary lobe to both sides respectively, main lobe and all secondary lobes are combined as a semicircle, on main lobe and secondary lobe respectively with from central point uniformly-spaced distance carry out the layout of measured node, measured node quantity is 3 times of measured node on the secondary lobe on the main lobe.

9. smart antenna signal strength measurement according to claim 8 system, it is characterized in that: described processor is arm processor.

10. smart antenna signal strength measurement according to claim 9 system, it is characterized in that: described wireless data transfer module is the Zigbee module.

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