Antenna Pointing Loss Blocks 1.1

Communication signals can be attenuated at the receive antenna if there is a misalignment between the transmit and receive antenna. This can be either a static misalignment or a time varying misalignment, like when an antenna is mounted on a tower that sways in the wind.Communications signals can also be totally blocked by obstructions passing in front of an antenna. An example would be an antenna mounted in a buoy out at sea that occasionally has a wave wash over it.Both these conditions cause a loss in overall communications performance. The models in this submission show how to simulate these effects of antenna misalignment and obstruction in a Simulink communications system simulation.1- XModel6. This model is a comms simulation with perfect antenna pointing.2- XModel6Gauss. This model shows how to simulate a static misalignment between a transmit and receive antenna. The antenna pattern used in this example is a Gaussian approximation.3- XModel6Sinc. This model shows how to simulate a dynamic pointing loss. In this case the misalignment is simulated with a sinusoidal function. The antenna pattern used in this example is for a square feed horn, which has a sinc rolloff characteristic.4- XModel6SincBlocked. This model shows how to simulate a receive antenna that is misaligned and periodically obstructed. The obstruction is modeled with a low duty cycle square wave. The antenna pattern used in this example is for a square feed horn, which has a sinc rolloff characteristic.

Requirements:	No special requirements
Platforms:	Matlab
Keyword:	Antenna,  Communications,  Dynamic,  Misalignment,  Model,  Mounted,  Obstruction,  Pattern,  Receive,  Rolloff,  Shows,  Signals,  Simulate,  Square,  Static,  Transmit
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