CN106211193B - Electromagnetic wave green covering device and method - Google Patents
Electromagnetic wave green covering device and method Download PDFInfo
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- CN106211193B CN106211193B CN201610836837.9A CN201610836837A CN106211193B CN 106211193 B CN106211193 B CN 106211193B CN 201610836837 A CN201610836837 A CN 201610836837A CN 106211193 B CN106211193 B CN 106211193B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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Abstract
The invention discloses an electromagnetic wave green covering device, wherein a transmitting channel comprises a first transmitting and receiving switch, a first adjustable attenuator and a second transmitting and receiving switch, the first transmitting and receiving switch is used for receiving branch signals sent by an indoor distribution system and guiding the branch signals to the transmitting channel, the first adjustable attenuator reduces transmitting power output by the transmitting channel, and the second transmitting and receiving switch enables the branch signals to radiate signals outwards through an antenna; the receiving channel comprises a second receiving and transmitting switch, a second adjustable attenuator, a low noise amplifier and a first receiving and transmitting switch, the signal collected by the antenna is sent to the second receiving and transmitting switch, the second receiving and transmitting switch outputs the signal to the second adjustable attenuator, the signal enters the low noise amplifier, and finally the signal is sent to an indoor distribution system branch through the first receiving and transmitting switch; the invention realizes the minimization of electromagnetic wave signals radiated to human bodies under the condition of normal networking communication, can reduce the radiation to the human bodies and simultaneously reduces the power consumption.
Description
Technical Field
The invention belongs to the technical field of radio electromagnetic waves, relates to an electromagnetic wave green covering device and method, and particularly relates to indoor covering of a ZigBee wireless network.
Background
With the development and progress of society, a large number of devices and activities with electromagnetic waves, such as television towers, broadcasting stations, radars, satellite communication, microwaves, mobile phone base stations and the like, are increasing. The devices play an important role in improving the living standard of human beings and the development of society, and the generated electromagnetic waves are also an environmental pollution factor. As long as various electric appliances such as household appliances, wireless network equipment, mobile communication equipment and the like are in an operation and use state, electromagnetic wave radiation exists around the electric appliances. For a good conductor, the human body, electromagnetic waves inevitably constitute a certain degree of damage. The long-term exposure to high electromagnetic wave radiation can affect human health, and can cause serious harm to four kinds of people with poor physical conditions, such as pregnant women, children, old people and patients.
With the advent of the big data age, the communication capacity, information transmission rate, and spectrum utilization efficiency of wireless communication systems are facing new challenges. However, due to limited spectrum resources and inherent bandwidth limitations of electronic devices, it is difficult to implement a scheme that merely increases the performance of a wireless communication system, such as data transmission rate and spectrum utilization, by spreading the spectrum width. Therefore, searching for a new wireless communication scheme based on the existing spectrum resources has become an important research subject in the wireless communication field.
The key point of the method lies in timely discovery, prevention and control of pollution far away from electromagnetic wave radiation, and the uniform coverage of the indoor wireless network is mainly carried out by using an indoor distribution system at present. Although the signal full coverage is realized, the beauty vision of ' minimizing electromagnetic wave signals radiated to human bodies ' cannot be realized, the invention aims to solve the problem that the intensity of the electromagnetic wave signals radiated to the human bodies cannot be minimized on the premise of normal networking communication ', the transmission power is reduced through the adjustable attenuator, so that the radiation to the human bodies is reduced, and on the other hand, the power consumption is also reduced.
Disclosure of Invention
The invention aims to provide an electromagnetic wave green covering device and method, and aims to solve the technical problem of minimizing the intensity of electromagnetic wave signals radiated to a human body on the premise of normal network communication.
The technical scheme provided by the invention is as follows:
the invention relates to an electromagnetic wave green covering device, which comprises a transmitting channel and a receiving channel, wherein a first transceiving switch, a first adjustable attenuator and a second transceiving switch are arranged in the transmitting channel, the first transceiving switch is used for receiving branch signals sent by an indoor distribution system and guiding the branch signals to the transmitting channel, the first adjustable attenuator reduces transmitting power output by the transmitting channel, and the second transceiving switch enables the branch signals to radiate signals outwards through an antenna;
the receiving channel is internally provided with a second receiving and transmitting switch, a second adjustable attenuator, a low noise amplifier and a first receiving and transmitting switch, the signal collected by the antenna is sent to the second receiving and transmitting switch, the second receiving and transmitting switch outputs the signal to the second adjustable attenuator, the signal enters the low noise amplifier, and finally the signal is sent to the indoor distribution system branch through the first receiving and transmitting switch.
Preferably, the attenuator further comprises a first dial switch and a second dial switch, wherein the first dial switch and the second dial switch are respectively connected with the first adjustable attenuator.
The first dial switch and the second dial switch are respectively connected with the first adjustable attenuator and are used for controlling a high-low level control pin of the first adjustable attenuator to change the attenuation of the first adjustable attenuator.
Preferably, the attenuator further comprises a third dial switch and a fourth dial switch, wherein the third dial switch and the fourth dial switch are respectively connected with the second adjustable attenuator.
Preferably, the third dial switch and the fourth dial switch are respectively connected to the second adjustable attenuator, and are used for controlling the high-low level control pin of the second adjustable attenuator to change the attenuation of the second adjustable attenuator, so as to reduce the reception of other path signals (multipath effect) having a large influence by the indoor distribution system.
Preferably, a first input/output port and a first directional coupler are arranged in the first transceiving switch, a branch signal of the indoor distribution system is connected to the first input/output port, a pin 4 of the first directional coupler generates a switch control signal after acquiring an input radio frequency signal, the first transceiving switch is guided to the transmitting channel, a pin 2 of the first directional coupler outputs the signal to the first transceiving switch, the signal enters the first adjustable attenuator, and the first adjustable attenuator reduces transmitting power output by the transmitting channel.
Preferably, a second input/output port is arranged in the second transceiving switch, the antenna collected signal enters the second transceiving switch through the second input/output port, the second transceiving switch inputs the signal to the second adjustable attenuator and then enters the low noise amplifier, and the low noise amplifier maintains the receiving sensitivity of the branch signal of the indoor distribution system, and then the branch signal is led to the first directional coupler through the first transceiving switch, output to the first input/output port, and access to the indoor distribution system.
Preferably, when the transmission channel transmits a signal, the first transceiving switch is an input port, and the second transceiving switch is an output port.
Preferably, when the receiving channel receives a signal, the second transceiving switch is an input port, and the first transceiving switch is an output port.
An electromagnetic wave green covering method, comprising:
step 1: the wireless terminal is connected with the indoor distribution system, and the branch signal sent by the indoor distribution system enters the first adjustable attenuator after passing through the first transceiving switch;
step 2: the wireless terminal reads the signal strength indicated value, adjusts the first adjustable attenuator according to the value, then enters the second transceiving switch, and finally radiates to the air through the antenna;
and step 3: the signal intensity radiated to the air is controlled by the first adjustable attenuator, and the attenuation of the first adjustable attenuator is continuously increased by combining the communication effect of the wireless terminal and the indoor distribution system; the strength of the signals radiated to the air is reduced, and normal communication can be realized;
and 4, after the signal of the wireless terminal is sent to the antenna, the signal enters a second adjustable attenuator through a second receiving and sending switch, the second adjustable attenuator is used for deteriorating the receiving sensitivity and avoiding the leakage of the signal sent by the wireless terminal which is not in the area, then the signal enters a low-noise amplifier, the low-noise amplifier is used for reducing the sending power of the wireless terminal in order to keep the receiving sensitivity of the indoor distribution system not deteriorated, and finally the signal is sent out through the first receiving and sending switch.
In the step 4, under the condition that the transmission power of the wireless terminal is adjustable, reading a signal intensity indicated value of the wireless terminal in an indoor distribution system; and adjusting the transmitting power of the wireless terminal according to the strength of the indicated value, wherein if the indicated value is strong, the transmitting power of the wireless terminal is reduced more, and if the indicated value is weak, the transmitting power of the wireless terminal is reduced less.
In step 4, when the transmission power of the wireless terminal is not adjustable, a signal sent by the same terminal may be received by both the area a of the indoor distribution system and the area B; this enhances the multi-path distortion of the signal, which can be ameliorated by appropriate adjustment of the second adjustable attenuator.
The invention has the beneficial effects that:
1. under the premise of normal networking communication, electromagnetic wave signals radiated to a human body are minimized (especially, the effect is most obvious when the coverage is distributed in a small area).
2. The wireless terminal with controllable transmission power can reduce the transmission power in part of occasions, on one hand, the radiation to human bodies is reduced, and on the other hand, the power consumption (especially battery products) is also reduced.
3. The method and the device realize the control of the strength of the received and transmitted signals, reduce the phenomenon that the same terminal signal flees to different distribution areas to increase multipath distortion to cause poor communication effect.
Drawings
FIG. 1 is a schematic diagram of an electromagnetic wave green cover device according to the present invention.
FIG. 2 is a circuit diagram of an electromagnetic wave green cover device according to the present invention.
FIG. 3 is a first flowchart of the transmitting channel of the electromagnetic wave green covering method of the present invention.
FIG. 4 is a second flowchart of the emission channel of the electromagnetic wave green covering method of the present invention.
FIG. 5 is a third flowchart of the electromagnetic wave green covering method of the present invention for the transmitting channel.
FIG. 6 is a flow chart of a receiving channel of the electromagnetic wave green covering method according to the present invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1, an electromagnetic wave green covering apparatus provided in an embodiment of the present invention includes a transmitting channel and a receiving channel, where the transmitting channel is provided with a first transceiving switch, a first adjustable attenuator, and a second transceiving switch, the first transceiving switch is configured to receive a branch signal sent by an indoor distribution system and direct the branch signal to the transmitting channel, the first adjustable attenuator reduces a transmitting power output by the transmitting channel, and the second transceiving switch radiates the branch signal to an outside through an antenna;
the receiving channel is internally provided with a second receiving and transmitting switch, a second adjustable attenuator, a low noise amplifier and a first receiving and transmitting switch, the signal collected by the antenna is sent to the second receiving and transmitting switch, the second receiving and transmitting switch outputs the signal to the second adjustable attenuator, the signal enters the low noise amplifier, and finally the signal is sent to the indoor distribution system branch through the first receiving and transmitting switch.
The first dial switch and the second dial switch are respectively connected with the first adjustable attenuator.
The first dial switch and the second dial switch are respectively connected with the first adjustable attenuator and are used for controlling a high-low level control pin of the first adjustable attenuator to change the attenuation of the first adjustable attenuator.
The third dial switch and the fourth dial switch are respectively connected with the second adjustable attenuator.
The third dial switch and the fourth dial switch are respectively connected with the second adjustable attenuator and are used for controlling a high-low level control pin of the second adjustable attenuator to change the attenuation of the second adjustable attenuator so as to reduce other path signals (multipath effect) which are received by the indoor distribution system and have larger influence.
Referring to a circuit diagram of an electromagnetic wave green coverage device shown in fig. 2, a first input/output port and a first directional coupler are arranged in a first transceiver switch, a branch signal of an indoor distribution system is connected to the first input/output port, a 4 th pin of the first directional coupler generates a switch control signal after an input radio frequency signal is collected, the first transceiver switch is guided to a transmitting channel, a 2 nd pin of the first directional coupler outputs a signal to the first transceiver switch, the signal enters a first adjustable attenuator, and the first adjustable attenuator reduces transmitting power output by the transmitting channel.
And a second input/output port is arranged in the second transceiving switch, an antenna collected signal enters the second transceiving switch through the second input/output port, the second transceiving switch inputs the signal into the second adjustable attenuator and then enters the low-noise amplifier, the low-noise amplifier maintains the receiving sensitivity of the indoor distribution system branch, and then the signal is led to the first directional coupler through the first transceiving switch, is output to the first input/output port and is accessed into the indoor distribution system.
When the transmitting channel transmits signals, the first receiving and transmitting switch is an input port, and the second receiving and transmitting switch is an output port.
When the receiving channel receives signals, the second receiving and transmitting switch is an input port, and the first receiving and transmitting switch is an output port.
The specific embodiment takes a ZigBee indoor distribution system as an example, and on the basis of the original indoor distribution system, an electromagnetic wave green covering device is added in front of an antenna. The transmitting channel and the receiving channel of the electromagnetic wave green covering device are respectively connected with an 8-bit dial switch adjustable attenuator. The 8-bit dial switch of the transmitting channel can enable the intensity of the transmitting signal to have an adjusting range of 30dB. The 8-bit dial switch of the receiving channel can enable the received signal strength to have an adjusting range of 30 dB:
emission channel:
the indoor distribution system branch signal is connected to the first input/output port, and the 4 th pin of the first directional coupler is used for generating a switch control signal after acquiring an input radio frequency signal, so that the switch is guided to a transmitting channel. The 2 nd pin of the first directional coupler outputs a signal to the first receiving and transmitting switch, the signal enters the first adjustable attenuator after passing through the first receiving and transmitting switch, and finally the signal enters the second receiving and transmitting switch and is connected with the antenna through the second input and output port to radiate the signal outwards.
Receiving a channel:
the antenna enters a second receiving and transmitting switch through a second input/output port (when in a receiving state, the 4 th pin of the first directional coupler does not acquire signals with enough strength, and the receiving and transmitting switch is guided to be a receiving channel), the second receiving and transmitting switch sends the signals to a second adjustable attenuator and then enters a low noise amplifier, then the signals are led to the first directional coupler through the first receiving and transmitting switch, output to the first input/output port and finally access to an indoor distribution system branch.
Referring to fig. 3 and fig. 6, there are shown flowcharts of a transmitting channel and a receiving channel of the electromagnetic wave green covering method according to the embodiment of the invention. The electromagnetic wave green covering method comprises the following steps:
step 1: the wireless terminal is connected with the indoor distribution system, and the branch signal sent by the indoor distribution system enters the first adjustable attenuator after passing through the first transceiving switch;
step 2: the wireless terminal reads the signal strength indicated value, adjusts the first adjustable attenuator according to the value, then enters the second transceiving switch, and finally radiates to the air through the antenna;
and 3, step 3: the signal intensity radiated to the air is controlled by the first adjustable attenuator, and the attenuation of the first adjustable attenuator is continuously increased by combining the communication effect of the wireless terminal and the indoor distribution system; the strength of the signal radiated to the air is reduced, and normal communication can be realized.
And 4, after the signal of the wireless terminal is sent to the antenna, the signal enters a second adjustable attenuator through a second receiving and sending switch, the second adjustable attenuator is used for deteriorating the receiving sensitivity and avoiding the leakage of the signal sent by the wireless terminal which is not in the area, then the signal enters a low-noise amplifier, the low-noise amplifier is used for reducing the sending power of the wireless terminal in order to keep the receiving sensitivity of the indoor distribution system not deteriorated, and finally the signal is sent out through the first receiving and sending switch.
In the step 4, under the condition that the transmitting power of the wireless terminal is adjustable, reading a signal intensity indicated value of the wireless terminal in an indoor distribution system; and adjusting the transmitting power of the wireless terminal according to the strength of the indicated value, wherein if the indicated value is strong, the transmitting power of the wireless terminal is reduced more, and if the indicated value is weak, the transmitting power of the wireless terminal is reduced less.
For example, the read values are: equipment A = -35dBm, equipment B = -55dBm, equipment C = -72dBm, taking TI chip CC2530 as an example, the power adjustable range is 32dB; device a may adjust the transmit power to a minimum; device B may reduce transmit power by 20dB; device C can reduce the transmitted power by 3dB, thus achieving that the human body will reduce the radiation by at least 3dB (50%) in this area, while the battery life will be increased significantly for battery powered terminals.
In step 4, when the transmission power of the wireless terminal is not adjustable, a signal sent by the same terminal may be received by both the area a of the indoor distribution system and the area B; this enhances the multi-path distortion of the signal, which can be ameliorated by appropriate adjustment of the first adjustable attenuator.
The specific embodiment is as follows, in a first embodiment of the emission channel of the electromagnetic wave green coverage method, the working flow of the emission channel is as follows:
the wireless terminals are connected to the indoor distribution system, and the signal strength indicating values are read from the wireless terminals. And adjusting a first adjustable attenuator in the electromagnetic wave green covering device according to the indication value. Dividing the signal strength indication value into three types;
type I: the difference of the signal strength of the indoor distribution system received by the wireless terminal is large. For example: device a = -25dBm; device B = -45dBm; device C = -65dBm.
Type I: the adjustable attenuator of the transmitting channel in the intensity controller of the transmitting and receiving signal is adjusted to 12dB. The signal strength values of the three wireless terminals at this time are: a = -37dBm; b = -57dBm; c = -77dBm.
This achieves that the human body will have a 12dB (93.75%) reduction in radiation in this region. The signal strength of a minimum of-77 dBm can completely satisfy normal communication (for example, the universal receiving sensitivity of the ZigBee terminal is < = -90 dBm).
Type II: the wireless terminal has high signal strength of receiving the indoor distribution system, but the difference is small. For example: equipment a = -25dBm; device B = -28dBm; device C = -22dBm.
Type II: the first adjustable attenuator in the electromagnetic wave green covering means is adjusted to 30dB. The values of the three wireless terminals at this time are: a = -55dBm; b = -58dBm; c = -52dBm.
This achieves that the human body will have a 30dB (99.9%) reduction in radiation in this region. The signal strength of minimum-58 dBm can fully satisfy normal communication (for example, the general receiving sensitivity of the ZigBee terminal is < = -90 dBm).
Type III: the signal strength of the indoor distribution system received by the wireless terminal is weak, but the difference is small. For example: equipment a = -75dBm; device B = -76dBm; device C = -72dBm.
Type III: the first adjustable attenuator in the electromagnetic wave green covering device is not adjusted (or is adjusted to be 3dB in a small amplitude). The values for the three wireless terminals at this time are:
a = -75 (or-78) dBm;
a = -76 (or-79) dBm;
a = -72 (or-75) dBm;
in this region the radiation to which the human body is subjected is inherently small. If a further reduction is desired, the radiation can be reduced by 3dB (50%). The signal strength of minimum-81 dBm can satisfy normal communication (for example, the general receiving sensitivity of the ZigBee terminal is < = -90 dBm).
The receiving sensitivity of the wireless terminal can reach < = -90dBm generally, but the signal transmission environment is considered to be non-free space. When the adjustable attenuator of the transmitting channel is adjusted, the signal intensity value is not suitable to be adjusted below-80 dBm, so as to avoid the condition that the communication is good or bad.
Receiving a channel working process:
and the wireless terminal is connected with the indoor distribution system, whether the transmitting power of the wireless terminal is adjustable or not and under the condition that the transmitting power of the wireless terminal is adjustable, the signal intensity indicated value of each wireless terminal is read from the indoor distribution system. For example, the read values are:
device a = -35dBm,
device B = -55dBm,
device C = -72dBm,
taking TI chip CC2530 as an example, the power adjustable range is 32dB.
Device a may adjust the transmit power to a minimum;
device B may reduce the transmit power by 20dB;
device C may reduce the transmit power by 3dB.
It is achieved that the human body will reduce the radiation by at least 3dB (50%) in this area, while the battery life of the battery-powered terminal will be increased considerably. The signal strength of minimum-75 dBm can completely satisfy the normal communication (the receiving sensitivity of the indoor subsystem added with the receiving and transmitting signal strength controller can be at least < = -90 dBm).
Under the condition that the transmitting power of the wireless terminal is not adjustable, so that signals sent by the same terminal are caused, and the indoor distribution system A area can receive stronger signals, and the indoor distribution system B area can receive stronger signals. This enhances multipath distortion of the signal. This phenomenon can be improved by appropriately adjusting the adjustable attenuator of the receive channel in the transmit-receive signal strength controller.
The receiving sensitivity of the wireless terminal can reach < = -90dBm generally, but the signal transmission environment is considered to be non-free space. When the adjustable attenuator of the transmitting channel is adjusted, the signal intensity value is not suitable to be adjusted below-80 dBm, so as to avoid the condition that the communication is good or bad.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (3)
1. A covering method of an electromagnetic wave green covering device comprises a transmitting channel and a receiving channel, wherein a first transceiving switch, a first adjustable attenuator and a second transceiving switch are arranged in the transmitting channel, the first transceiving switch is used for receiving branch signals sent by an indoor distribution system and guiding the branch signals to the transmitting channel, the first adjustable attenuator reduces transmitting power output by the transmitting channel, and the second transceiving switch enables the branch signals to radiate signals outwards through an antenna; a second receiving and transmitting switch, a second adjustable attenuator, a low noise amplifier and a first receiving and transmitting switch are arranged in the receiving channel, signals collected by the antenna are sent to the second receiving and transmitting switch, the second receiving and transmitting switch outputs the signals to the second adjustable attenuator, the signals enter the low noise amplifier, and finally the signals are sent to indoor distribution system branches through the first receiving and transmitting switch; the first dial switch and the second dial switch are respectively connected with the first adjustable attenuator; the first dial switch and the second dial switch are respectively connected with the first adjustable attenuator and are used for controlling a high-low level control pin of the first adjustable attenuator to change the attenuation of the first adjustable attenuator; the third dial switch and the fourth dial switch are respectively connected with the second adjustable attenuator; the third dial switch and the fourth dial switch are respectively connected with the second adjustable attenuator and are used for controlling a high-low level control pin of the second adjustable attenuator to change the attenuation of the second adjustable attenuator so as to reduce other path signals which are received by the indoor distribution system and have larger influence; a first input/output port and a first directional coupler are arranged in the first transceiving switch, a branch signal of an indoor distribution system is connected to the first input/output port, a 4 th pin of the first directional coupler generates a switch control signal after acquiring an input radio frequency signal, the first transceiving switch is guided to a transmitting channel, a 2 nd pin of the first directional coupler outputs a signal to the first transceiving switch, the signal enters a first adjustable attenuator, and the first adjustable attenuator reduces transmitting power output by the transmitting channel; a second input/output port is arranged in the second transceiving switch, an antenna collected signal enters the second transceiving switch through the second input/output port, the second transceiving switch inputs the signal to the second adjustable attenuator and then enters the low-noise amplifier, and then the signal is communicated to the first directional coupler through the first transceiving switch, is output to the first input/output port and is accessed to an indoor distribution system; when the transmitting channel transmits signals, the first transceiving switch is an input port, and the second transceiving switch is an output port; when the receiving channel receives signals, the second transceiving switch is an input port, and the first transceiving switch is an output port, and the covering method is characterized by comprising the following steps:
step 1: the wireless terminal is connected with the indoor distribution system, and the branch signal sent by the indoor distribution system enters the first adjustable attenuator after passing through the first transceiving switch;
step 2: the wireless terminal reads the signal strength indicated value, adjusts the first adjustable attenuator according to the value, then enters the second transceiving switch, and finally radiates to the air through the antenna;
and step 3: the signal intensity radiated to the air is controlled by the first adjustable attenuator, and the attenuation of the first adjustable attenuator is continuously increased by combining the communication effect of the wireless terminal and the indoor distribution system; the strength of the signals radiated to the air is reduced, and normal communication can be realized;
and 4, after the signal of the wireless terminal is sent to the antenna, the signal enters a second adjustable attenuator through a second receiving and sending switch, the second adjustable attenuator is used for deteriorating the receiving sensitivity and avoiding the leakage of the signal sent by the wireless terminal which is not in the area, then the signal enters a low-noise amplifier, the low-noise amplifier is used for reducing the sending power of the wireless terminal in order to keep the receiving sensitivity of the indoor distribution system not deteriorated, and finally the signal is sent out through the first receiving and sending switch.
2. The coverage method according to claim 1, wherein in step 4, in case that the wireless terminal transmission power is adjustable, reading a wireless terminal signal strength indication value in an indoor distribution system; and adjusting the transmitting power of the wireless terminal according to the strength of the indicated value, wherein if the indicated value is strong, the transmitting power of the wireless terminal is reduced more, and if the indicated value is weak, the transmitting power of the wireless terminal is reduced less.
3. The coverage method according to claim 1, wherein in the step 4, if the transmission power of the wireless terminal is not adjustable, the signals sent by the same terminal are caused to be possible to receive stronger signals in both the a area and the B area of the indoor distribution system; this enhances the multi-path distortion of the signal and the second adjustable attenuator is adjusted appropriately to improve the multi-path distortion.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201238302Y (en) * | 2008-07-02 | 2009-05-13 | 南京广顺网络通信设备有限公司 | Power amplifier of wireless local area network |
| CN201393303Y (en) * | 2009-04-24 | 2010-01-27 | 武汉虹信通信技术有限责任公司 | Device for adjusting power of indoor antenna by utilizing division multiple address uplink signal detection |
| CN103187985A (en) * | 2011-12-27 | 2013-07-03 | 中国移动通信集团公司 | Communication equipment and communication system |
| WO2013168665A1 (en) * | 2012-05-11 | 2013-11-14 | シャープ株式会社 | High frequency circuit and high frequency module comprising same |
| CN203606490U (en) * | 2013-12-13 | 2014-05-21 | 武汉大学 | Receiving front end of radar array employing WIFI as outer radiation source |
| CN206226735U (en) * | 2016-09-20 | 2017-06-06 | 南京物联传感技术有限公司 | A kind of electromagnetic wave green cladding system |
-
2016
- 2016-09-20 CN CN201610836837.9A patent/CN106211193B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201238302Y (en) * | 2008-07-02 | 2009-05-13 | 南京广顺网络通信设备有限公司 | Power amplifier of wireless local area network |
| CN201393303Y (en) * | 2009-04-24 | 2010-01-27 | 武汉虹信通信技术有限责任公司 | Device for adjusting power of indoor antenna by utilizing division multiple address uplink signal detection |
| CN103187985A (en) * | 2011-12-27 | 2013-07-03 | 中国移动通信集团公司 | Communication equipment and communication system |
| WO2013168665A1 (en) * | 2012-05-11 | 2013-11-14 | シャープ株式会社 | High frequency circuit and high frequency module comprising same |
| CN203606490U (en) * | 2013-12-13 | 2014-05-21 | 武汉大学 | Receiving front end of radar array employing WIFI as outer radiation source |
| CN206226735U (en) * | 2016-09-20 | 2017-06-06 | 南京物联传感技术有限公司 | A kind of electromagnetic wave green cladding system |
Non-Patent Citations (3)
| Title |
|---|
| 用等电平测量辐射计接收机的线性度;徐德忠;《宇航计测技术》;19980225(第01期);全文 * |
| 适用于TD-SCDMA系统的极低功耗发射机;王昭等;《通信技术》;20101210(第12期);全文 * |
| 遥控遥测系统拉距实验中衰减器接法的讨论;陈振伟等;《信息化研究》;20100120(第01期);全文 * |
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