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What is the minimum amount of RF spectrum needed for an FDD LTE radio channel?

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What is the minimum amount of RF spectrum needed for an FDD LTE radio channel?

(a) 1.4 MHz

(b) 2.8 MHz

(c) 5 MHz

(d) 20 MHz

This question was posed to me during an interview for a job.

This intriguing question comes from Long Term Evolution (LTE) topic in portion 4G of Wireless/Mobile

1 Answer

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Correct option is (b) 2.8 MHz

Explanation: In telecommunication, Long-Term Evolution (LTE) is a standard for high-speed wireless communication for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA technologies. The minimum amount of RF spectrum needed for an FDD LTE radio channel is 2.8 MHz.

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