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Hello Voodi,

Fading is a major impairment in transmitting the signal in wireless communication. Thus, it becomes very necessary to nullify its effect to transmit the signal successfully and so the diversity technique along with its different types is being employed to combat the effect of fading.
Fading is a major impairment in transmitting the signal in wireless communication. Thus, it becomes
very necessary to nullify its effect to transmit the signal successfully and so the diversity technique along with its different types is being employed to combat the effect of fading.
For not-too-large aperture sizes, fading is more destructive for moderate turbulence than for strong turbulence conditions. The trade-off between link margin and outage capacity is especially important for moderate to strong turbulence conditions. Use of multiple apertures permits a substantial gain to be achieved in the outage capacity. Channel coding is efficient only for significantly reduced turbulence. The achieved performance improvement by aperture averaging is more significant for higher-order modulations like Q-ary PPM.

Refer to the following link. It will surely help.
https://www.researchgate.net/publication/224083258_Fading_Reduction_by_Aperture_Averaging_and_Spatial_Diversity_in_Optical_Wireless_Systems

Regards

Burhan

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