CN111147118A - Method for improving Wifi directional transmission performance by utilizing antenna left-right rotation polarization - Google Patents
Method for improving Wifi directional transmission performance by utilizing antenna left-right rotation polarization Download PDFInfo
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- CN111147118A CN111147118A CN201911155734.6A CN201911155734A CN111147118A CN 111147118 A CN111147118 A CN 111147118A CN 201911155734 A CN201911155734 A CN 201911155734A CN 111147118 A CN111147118 A CN 111147118A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/10—Polarisation diversity; Directional diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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Abstract
The invention discloses a method for improving Wifi directional transmission performance by utilizing antenna left-right rotation polarization, which comprises the following steps: the AP terminal adopts a directional right-handed polarized antenna to send signals to a first-stage user; the first-stage user receives the right-handed polarized wave sent by the AP end by using the directional right-handed polarized antenna, the first-stage user sends a signal to the second-stage user by using the directional right-handed polarized antenna, the second-stage user receives the right-handed polarized wave sent by the first-stage user by using the directional right-handed polarized antenna, the second-stage user sends a signal to the third-stage user by using the directional right-handed polarized antenna, and the third-stage user receives the right-handed polarized wave sent by the second-stage user by using the directional right-handed polarized antenna, so that recursion is carried out until the last-stage user receives the right-handed polarized wave by using the directional right-handed polarized antenna, and the data stream cannot be redistribute.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a method for improving Wifi directional transmission performance by utilizing antenna left-right rotation polarization.
Background
The signal transmission of modern wireless communication needs to meet the requirements of accurate transmission at a long distance as far as possible, different application scenes, different information quantity requirements and different design requirements on a communication system. At present, Wifi network scene:
1. in the office (see FIG. 1: scene 1): in a small local area, an AP transmits multiple users simultaneously in parallel, and the target of the AP is omni-directional, or 360 degrees in one plane, because the user's location does not fix the source of the own request signal, which may also be omni-directional, the design of the antenna circuit of the AP or the user tends to be an omni-directional antenna.
2. Fixed position surveillance camera (see FIG. 2: scene 2): the AP transmits simultaneously to multiple users in parallel, and the target of the AP is omni-directional, or 360 degrees in one plane, and the antenna circuit design is an omni-directional design. But the user position is fixed and its antenna circuit design is directional.
3. In a subway station (see FIG. 3: scene 3): the AP fixedly broadcasts signals to an area range, the antenna circuit design of the AP is directional, but the position of a user is not fixed, and the antenna tends to be in an omnidirectional design mode.
4. Street light advertising (see FIG. 4: scene 4): the AP fixedly sends a receiving signal to one direction, a user side is connected with a plurality of users in series in a cascade mode, and the AP and the users adopt a directional antenna circuit design mode.
For the application of scenario 4, if the AP or the user terminal adopts an omnidirectional antenna circuit design, the transmission distance of the data signal is greatly reduced. On the contrary, the AP and the user side both adopt the design of directional antennas, and the transmission distance is significantly increased.
Therefore, a method for improving Wifi directional transmission performance by utilizing antenna left-right polarization, which can ensure that uplink and downlink signals are transmitted simultaneously and communication rate is also improved, is needed to ensure that electromagnetic waves maintain a certain transmission isolation degree in an atmospheric propagation space when the AP and the user terminal perform bidirectional communication in a 2.4GHz frequency band.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for improving Wifi directional transmission performance by using antenna left-right polarization, so that when the AP and the user terminal perform bidirectional communication in a 2.4GHz band, electromagnetic waves maintain a certain transmission isolation in an atmospheric propagation space, and the communication rate is improved while uplink and downlink signals are transmitted simultaneously.
The method for improving the Wifi directional transmission performance by utilizing the antenna left-right rotation polarization comprises the following steps:
step S1: transmitting the data signal in the downlink direction;
the step S1 includes the following steps:
step S11: the AP terminal adopts a directional right-handed polarized antenna to send signals to a first-stage user;
step S12: the first-stage user receives the right-handed polarized wave sent by the AP end by using the directional right-handed polarized antenna, and then sends a signal to the second-stage user by using the directional right-handed polarized antenna;
step S13: the second-level user receives the right-handed polarized wave sent by the first-level user by using the directional right-handed polarized antenna, and then the second-level user sends a signal to the third-level user by using the directional right-handed polarized antenna;
step S14: the third-level user receives the right-handed polarized wave sent by the second-level user by using the directional right-handed polarized antenna, and recursion is carried out according to the right-handed polarized wave, until the last-level user receives the right-handed polarized wave by using the directional right-handed polarized antenna, the data stream cannot be redistributed;
step S2: transmitting the data signal in the uplink direction;
the step S2 includes the following steps:
step S21: the last stage user uses directional left-hand polarization antenna to send signal to the secondary user;
step S22: the secondary user receives the left-hand polarized wave sent by the last user by using the directional left-hand polarized antenna, and then sends a signal to the lower secondary user by using the directional left-hand polarized antenna;
step S23: the lower secondary user receives the left-hand polarized wave transmitted by the secondary user by using the directional left-hand polarized antenna, and then the lower secondary user transmits signals to the lower secondary user by using the directional left-hand polarized antenna;
step S24: and then the lower secondary user receives the left-hand polarized wave sent by the lower secondary user by the fixed left-hand polarized antenna, and recursion is carried out until the data signal reaches the AP end, and the AP end receives the left-hand polarized wave by the directional left-hand polarized antenna.
In the above scheme, the data signal uplink transmission communication link is provided with a first power amplifier and a first low noise amplifier.
In the above scheme, a second power amplifier and a second low noise amplifier are arranged on the data signal downlink direction transmission communication link.
The invention has the advantages and beneficial effects that: the invention provides a method for improving the Wifi directional transmission performance by utilizing the antenna left-right rotation polarization, which has the advantages of simple antenna design idea, capability of providing the utilization rate of Wifi signal energy, longer transmission distance and strong anti-interference capability on electromagnetic wave signals in space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a scene 1 in the background art.
Fig. 2 is a schematic diagram of a scene 2 in the background art.
Fig. 3 is a schematic diagram of a scene 3 in the background art.
Fig. 4 is a schematic diagram of a scene 4 in the background art.
Fig. 5 is a flow chart of the downlink transmission of data signals in the present invention.
Fig. 6 is a flow chart of the uplink transmission of data signals in the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention relates to a method for improving Wifi directional transmission performance by utilizing antenna left-right rotation polarization, which comprises the following steps:
step S1: transmitting the data signal in the downlink direction;
as shown in fig. 5, step S1 includes the following steps:
step S11: the AP terminal adopts a directional right-handed polarized antenna to send signals to a first-stage user;
step S12: the first-stage user receives the right-handed polarized wave sent by the AP end by using the directional right-handed polarized antenna, and then sends a signal to the second-stage user by using the directional right-handed polarized antenna;
step S13: the second-level user receives the right-handed polarized wave sent by the first-level user by using the directional right-handed polarized antenna, and then the second-level user sends a signal to the third-level user by using the directional right-handed polarized antenna;
step S14: and the third-level user receives the right-handed polarized wave sent by the second-level user by using the directional right-handed polarized antenna, and recursion is carried out until the last-level user receives the right-handed polarized wave by using the directional right-handed polarized antenna, so that the data stream cannot be redistributed.
Step S2: transmitting the data signal in the uplink direction;
as shown in fig. 6, step S2 includes the following steps:
step S21: the last stage user uses directional left-hand polarization antenna to send signal to the secondary user;
step S22: the secondary user receives the left-hand polarized wave sent by the last user by using the directional left-hand polarized antenna, and then sends a signal to the lower secondary user by using the directional left-hand polarized antenna;
step S23: the lower secondary user receives the left-hand polarized wave transmitted by the secondary user by using the directional left-hand polarized antenna, and then the lower secondary user transmits signals to the lower secondary user by using the directional left-hand polarized antenna;
step S24: and then the lower secondary user receives the left-hand polarized wave sent by the lower secondary user by the fixed left-hand polarized antenna, and recursion is carried out until the data signal reaches the AP end, and the AP end receives the left-hand polarized wave by the directional left-hand polarized antenna.
In terms of antenna size, the transmitting end of each group may use a small-sized antenna, and the receiving end may use a large-sized antenna, specifically depending on the actual transmission distance requirements in combination with the material, design, antenna pattern and gain of the antennas.
Furthermore, on the whole uplink and downlink communication links, a first power amplifier and a first low noise amplifier are arranged on the data signal uplink direction transmission communication link; and a second power amplifier and a second low noise amplifier are arranged on the data signal downlink direction transmission communication link so as to ensure the strength and quality of the signal.
The invention has the advantages that:
1) the utilization rate of Wifi signal energy can be provided, and longer distance can be transmitted;
2) the design idea of the antenna is simple;
3) the anti-interference performance to electromagnetic wave signals in the space is very strong.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A method for improving Wifi directional transmission performance by utilizing antenna left-right rotation polarization is characterized by comprising the following steps:
step S1: transmitting the data signal in the downlink direction;
the step S1 includes the following steps:
step S11: the AP terminal adopts a directional right-handed polarized antenna to send signals to a first-stage user;
step S12: the first-stage user receives the right-handed polarized wave sent by the AP end by using the directional right-handed polarized antenna, and then sends a signal to the second-stage user by using the directional right-handed polarized antenna;
step S13: the second-level user receives the right-handed polarized wave sent by the first-level user by using the directional right-handed polarized antenna, and then the second-level user sends a signal to the third-level user by using the directional right-handed polarized antenna;
step S14: the third-level user receives the right-handed polarized wave sent by the second-level user by using the directional right-handed polarized antenna, and recursion is carried out according to the right-handed polarized wave, until the last-level user receives the right-handed polarized wave by using the directional right-handed polarized antenna, the data stream cannot be redistributed;
step S2: transmitting the data signal in the uplink direction;
the step S2 includes the following steps:
step S21: the last stage user uses directional left-hand polarization antenna to send signal to the secondary user;
step S22: the secondary user receives the left-hand polarized wave sent by the last user by using the directional left-hand polarized antenna, and then sends a signal to the lower secondary user by using the directional left-hand polarized antenna;
step S23: the lower secondary user receives the left-hand polarized wave transmitted by the secondary user by using the directional left-hand polarized antenna, and then the lower secondary user transmits signals to the lower secondary user by using the directional left-hand polarized antenna;
step S24: and then the lower secondary user receives the left-hand polarized wave sent by the lower secondary user by the fixed left-hand polarized antenna, and recursion is carried out until the data signal reaches the AP end, and the AP end receives the left-hand polarized wave by the directional left-hand polarized antenna.
2. The method for improving Wifi directional transmission performance using antenna left and right hand polarization as claimed in claim 1, wherein a first power amplifier and a first low noise amplifier are installed on the data signal uplink transmission communication link.
3. The method for improving the directional transmission performance of Wifi by utilizing the left-right rotation polarization of the antenna as claimed in claim 1, wherein a second power amplifier and a second low noise amplifier are arranged on the data signal downlink direction transmission communication link.
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| CN201911155734.6A CN111147118A (en) | 2019-11-22 | 2019-11-22 | Method for improving Wifi directional transmission performance by utilizing antenna left-right rotation polarization |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324623A (en) * | 2011-08-31 | 2012-01-18 | 华南理工大学 | Dual-band biorthogonal phase output power division feed network |
| CN103929823A (en) * | 2014-05-07 | 2014-07-16 | 重庆大学 | Electric wireless private network channel access control method based on service classification |
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- 2019-11-22 CN CN201911155734.6A patent/CN111147118A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324623A (en) * | 2011-08-31 | 2012-01-18 | 华南理工大学 | Dual-band biorthogonal phase output power division feed network |
| CN103929823A (en) * | 2014-05-07 | 2014-07-16 | 重庆大学 | Electric wireless private network channel access control method based on service classification |
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