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Which among the following is an environmental parameter that affects ran accuracy?

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Which among the following is an environmental parameter that affects ran accuracy?

(a) Phase dependent coefficient of attenuation

(b) Frequency dependent coefficient of attenuation

(c) Phase dependent coefficient of channel

(d) Frequency dependent coefficient of channel

This question was addressed to me in an interview for job.

The doubt is from Environment Awareness in chapter Location and Environment Awareness in Cognitive Radio of Cognitive Radio

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The correct choice is (d) Frequency dependent coefficient of channel

To explain: Frequency dependent coefficient of channel, path loss coefficient, and LOS/NLOS condition are some of the environmental parameters that affect range accuracy. The amount of influence shown by the frequency dependent coefficient of channel  depend on the frequency dependent feature of the radio.

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