Adaptive interference canceller

Abstract

This utility model pertains to radio navigation, specifically to interference-immune consumer navigation equipment. The adaptive interference canceller comprises a sealed housing consisting of a radio-transparent cover and a metal base with external connectors and an interference canceller board with electronic components mounted on either side, including analog elements and a digital signal processing unit. The interference canceller also includes a radio-absorbing shield, a metal plate that divides the interference canceller into two compartments. The first compartment, formed by the radio-absorbing shield and the radio-transparent cover, houses the power supply, power filter, and antenna system. The second compartment, formed by the metal base and the radio-absorbing shield, houses the interference canceller board. The base is round, and the housing lid is conical.The electrical connection between the antenna system and the board containing the electronic components is accomplished using shielded coaxial cables. The technical result of this utility model is to increase the electromagnetic compatibility of its components. 3 fig.

Description

[0001] This utility model pertains to radio navigation, specifically to interference-resistant consumer navigation equipment (CNE). The utility model improves the interference immunity of CNE for industrial and transport facilities. This improved interference immunity is achieved through digital space-time compensation algorithms.

[0002] Patent No. RU 154701 U1 describes a compact adaptive monoblock antenna system consisting of a sealed housing housing the antenna elements, analog circuits, and a digital signal processing unit. However, this compact adaptive monoblock antenna system has drawbacks, such as low electromagnetic compatibility between the antenna elements and the interference compensation unit.

[0003] Low electromagnetic compatibility occurs due to the location of antenna elements on the same board with analog paths and a digital signal processing unit.

[0004] The closest analog, a compact antenna array known from patent No. RU 124517 U1, is used as a prototype. The prototype contains a sealed housing, a digital signal processing unit, analog circuits, and an antenna system.

[0005] The disadvantages of the presented prototype include low electromagnetic compatibility between the antenna system components and the interference cancellation unit. Low electromagnetic compatibility is due to the emission of high-frequency interference by the digital signal processing unit and the penetration of this interference into the receiving radio paths. Interference emitted by the digital signal processing unit is received by the back lobe of the antenna system and fed to the input of the interference cancellation unit. Received interference degrades the performance of the adaptive interference cancellation algorithm, reducing the operating dynamic range and limiting the maximum number of interferences suppressed.

[0006] The technical result of the present utility model is to increase the electromagnetic compatibility of the components of the utility model.

[0007] The adaptive interference canceller comprises a sealed housing consisting of a radio-transparent cover and a metal base with external connectors and an interference canceller board with electronic components mounted on either side, including analog elements and a digital signal processing unit. The adaptive interference canceller additionally contains a radio-absorbing shield, made in the form of a metal plate and dividing the interference canceller into two compartments. The first compartment, formed by the radio-absorbing shield and the radio-transparent cover, houses the power supply, power filter, and antenna system. The second compartment, formed by the metal base and the radio-absorbing shield, houses the interference canceller board. The base is round, and the housing cover is conical. The electrical connection between the antenna system and the board containing the electronic components is made using shielded coaxial cables.

[0008] Placing the power supply, power filter, included analog elements, and antenna system on separate multilayer printed circuit boards, separated from the interference compensator board by metal radio-absorbing screens, allows for increasing the electromagnetic compatibility of the components of the utility model.

[0009] Thus, the proposed utility model has a new set of features that meets the criteria of “novelty” and “practical value”.

[0010] The proposed adaptive interference compensator is made from standardized elements that are mass-produced by the industry, which ensures the interchangeability of components and does not require additional technical solutions for its reproduction, which is important for mass production and repair work.

[0011] Therefore, the proposed utility model satisfies the criterion of “industrial applicability”.

[0012] The essence of the utility model is explained by an example of the design of an adaptive interference compensator, where Fig. 1 shows a general view of the utility model, Fig. 2 shows the base of the utility model, and Fig. 3 shows the utility model in section, where:

[0013] 1 - radio-transparent cover;

[0014] 2 - clamp;

[0015] 3 - metal base;

[0016] 4 - protrusion;

[0017] 5, 6, 7, 9 - connectors;

[0018] 8 - LED;

[0019] 10 - power filter;

[0020] 11 - antenna system;

[0021] 12 - power supply;

[0022] 13 - radio-absorbing screen for compartments No. 1 and No. 2;

[0023] 14 - interference suppressor board.

[0024] The adaptive interference canceller consists of two compartments, which contain the power supply 12, the power filter 10, the antenna system 11 and the interference canceller board 14. The first compartment is located between the radio-absorbing screen 13 and the radio-transparent cover 1, in which the power supply 12, the power filter 10 and the antenna system 11 are located. The second compartment is located between the metal base 3 and the radio-absorbing screen 13, in which the interference canceller board 14 is located.

[0025] Fig. 1 shows a general view of the utility model design. Radio-transparent cover 1 fits tightly onto metal base 3 and is secured with clamp 2. Compartment 2 is designed to accommodate the digital signal processing unit and analog components. Compartment 1 is designed to accommodate antenna system 11, power supply 12, and power filter 10 of the adaptive interference canceller. A projection 4 is located in the center of the metal base, allowing the adaptive interference canceller to be mounted on special structures.

[0026] Fig. 2 shows the base of the utility model. External interface connectors 5, 6, 7, and 9 for interacting with the utility model are located on the base. An LED 8 is located on the base of the utility model to indicate the operation of the utility model.

[0027] The adaptive interference canceller ensures the operation of the NAP equipment under conditions of powerful intentional and unintentional interference, suppressing a variety of dynamically changing spatially diverse interference.

[0028] Thus, dividing the utility model into two sections has improved the electromagnetic compatibility of the digital signal processing unit and the antenna system. Increasing electromagnetic compatibility in the utility model reduces the inherent noise level. This ensures a dynamic range and a specified amount of suppressed interference for the adaptive interference canceller.

[0029] The claimed adaptive interference canceller can be repeatedly reproduced on modern equipment and its use is planned to improve the noise immunity of the reception of signals from satellite radio navigation systems at industrial and transport facilities, which allows us to conclude that it meets the “industrial applicability” criterion for a utility model.

Claims

An adaptive interference compensator comprising a sealed housing consisting of a radio-transparent cover and a metal base with external connectors placed thereon and an interference compensator board with electronic components placed thereon on different sides, which include analog elements and a digital signal processing unit, characterized in that it additionally comprises a radio-absorbing screen made in the form of a metal plate and dividing the interference compensator into two compartments, wherein in the first compartment, formed by the radio-absorbing screen and the radio-transparent cover, a power supply unit, a power filter and an antenna system are placed, and in the second compartment, formed by the metal base and the radio-absorbing screen, the interference compensator board is placed, wherein the base is made round, the cover of the housing is made in the form of a cone, and the electrical connection between the antenna system and the board with electronic components is made by shielded coaxial cables.

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