Question

Radio Link Loss

Radio link loss is a key factor in the design of any radio communications system or wireless communication system.

The radio link loss is a signal loss that essentially reduces the power density of an electromagnetic wave or signal. Since the signal propagates through the environment in which it is traveling., All radio communication, broadcast, and wireless communication systems are affected by this.

Different reasons for the radio link loss

1. Free space loss:  Free space loss occurs when the signal travels through space without any other effects attenuating the signal. It will still diminish as it spreads out. As the signal has to cover a wider area, conservation of energy tells us that the energy in any given area will reduce as the area covered becomes larger.

2. Diffraction:  Radio link loss occurs when an object/obstacle appears in the path. The signal can diffract around the object, but losses occur. The loss is higher, the more rounded the object.

1. Multipath:  In a real terrestrial environment, signals will be reflected, and they will reach the receiver via several different links/paths. These signals may add or subtract from each other depending upon the relative phases of the signals. If the receiver is moved, the scenario will change, and the overall received signal will be found to vary with position.

4. Absorption losses:  Absorption losses occur if the radio links pass into a medium that is not transparent to radio signals.

For, e.g., Buildings, walls, etc., Atmospheric moisture, i.e., moisture in the air, Vegetation, i.e., in dense forest trees and foliage, can attenuate radio signals, particularly when wet.

1. Terrain (land):  The terrain over which signals travel will significantly affect the signal. Hills which obstruct the path will considerably attenuate the signal, often making reception impossible
2. Atmosphere:  The atmosphere can affect radio links paths.

How can we reduce loss?

1. Radio link loss cab is reduced by Predicting radio link loss.

2. Understanding the various elements affecting radio link loss is to be able to predict the loss for a given link.

  Most radio link loss predictions are made using the following techniques.

· Statistical methods:  Statistical methods of predicting signal path loss rely on measured and averaged losses for typical types of radio links. The figures are entered into the prediction model, which can calculate the figures based on the data. This type of approach is normally used for planning cellular networks, broadcast networks.

· Deterministic approach:  This approach to radio link loss and coverage prediction to be used for short-range links where the amount of required data falls within acceptable limits.

Radio Link Loss

Radio link loss is a key factor in the design of any radio communications system or wireless communication system.

The radio link loss is a signal loss that essentially reduces the power density of an electromagnetic wave or signal. Since the signal propagates through the environment in which it is traveling., All radio communication, broadcast, and wireless communication systems are affected by this.

Different reasons for the radio link loss

1. Free space loss:  Free space loss occurs when the signal travels through space without any other effects attenuating the signal. It will still diminish as it spreads out. As the signal has to cover a wider area, conservation of energy tells us that the energy in any given area will reduce as the area covered becomes larger.

2. Diffraction:  Radio link loss occurs when an object/obstacle appears in the path. The signal can diffract around the object, but losses occur. The loss is higher, the more rounded the object.

1. Multipath:  In a real terrestrial environment, signals will be reflected, and they will reach the receiver via several different links/paths. These signals may add or subtract from each other depending upon the relative phases of the signals. If the receiver is moved, the scenario will change, and the overall received signal will be found to vary with position.

4. Absorption losses:  Absorption losses occur if the radio links pass into a medium that is not transparent to radio signals.

For, e.g., Buildings, walls, etc., Atmospheric moisture, i.e., moisture in the air, Vegetation, i.e., in dense forest trees and foliage, can attenuate radio signals, particularly when wet.

1. Terrain (land):  The terrain over which signals travel will significantly affect the signal. Hills which obstruct the path will considerably attenuate the signal, often making reception impossible
2. Atmosphere:  The atmosphere can affect radio links paths.

How can we reduce loss?

1. Radio link loss cab is reduced by Predicting radio link loss.

2. Understanding the various elements affecting radio link loss is to be able to predict the loss for a given link.

  Most radio link loss predictions are made using the following techniques.

· Statistical methods:  Statistical methods of predicting signal path loss rely on measured and averaged losses for typical types of radio links. The figures are entered into the prediction model, which can calculate the figures based on the data. This type of approach is normally used for planning cellular networks, broadcast networks.

· Deterministic approach:  This approach to radio link loss and coverage prediction to be used for short-range links where the amount of required data falls within acceptable limits.

Please rewrite it in your own words (I mean paraphrase)

Answer 1

Radio Link Loss

Radio link loss may be a key think about the planning of any radio communications system or wireless communication system.

The link loss may be a signal loss that essentially reduces the facility density of an electromagnetic radiation or signal. Since the signal propagates through the environment during which it's traveling., All radio communication, broadcast, and wireless communication systems are suffering from this.

Different reasons for the link loss

1. Free space loss: Free space loss occurs when the signal travels through space with none other effects attenuating the signal. it'll still diminish because it spreads out. because the signal has got to cover a wider area, conservation of energy tells us that the energy in any given area will reduce because the area covered becomes larger.

2. Diffraction: link loss occurs when an object/obstacle appears within the path. The signal can diffract round the object, but losses occur. The loss is higher, the more rounded the thing .

Multipath: during a real terrestrial environment, signals are going to be reflected, and that they will reach the receiver via several different links/paths. These signals may add or subtract from one another depending upon the relative phases of the signals. If the receiver is moved, the scenario will change, and therefore the overall received signal are going to be found to vary with position.
4. Absorption losses: Absorption losses occur if the radio links pass into a medium that's not transparent to radio signals.

For, e.g., Buildings, walls, etc., Atmospheric moisture, i.e., moisture within the air, Vegetation, i.e., in dense forest trees and foliage, can attenuate radio signals, particularly when wet.

Terrain (land): The terrain over which signals travel will significantly affect the signal. Hills which obstruct the trail will considerably attenuate the signal, often making reception impossible
Atmosphere: The atmosphere can affect radio links paths.
How can we reduce loss?

Radio link loss cab is reduced by Predicting link loss.
2. Understanding the varied elements affecting link loss is to be ready to predict the loss for a given link.

Most link loss predictions are made using the subsequent techniques.

· Statistical methods: Statistical methods of imagining signal path loss believe measured and standard losses for typical kinds of radio links. The figures are inserted into the prediction model, which can calculate the figures supported the data . this type of approach is usually used for planning cellular networks, broadcast networks.

· Deterministic approach: This approach to link loss and coverage prediction to be used for short-range links where the quantity of required data falls within acceptable limits.

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