Q. What does SGSN stands for?

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Q. What location management feature is supported by 4G?

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Q. In 2007 ____________ announced its plan to transmit its network to 4G standard LTE with joint efforts of Vodafone group.

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Q. Hybrid ARQ is part of the ____________ layer.

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Q. OFDMA stands for ________

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Q. Why is a cyclic prefix required in an OFDMA?

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Q. What does the DC subcarrier indicate?

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Q. What processing step combines multiple OFDM subcarriers into a single signal for transmission?

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Q. Which property of OFDMA system allows adjacent subcarriers to be used without interference?

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Q. In OFDMA, what is the relationship between the subcarrier spacing f and symbol time t?

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Q. OFDM is a technique for 3G mobile communication.

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Q. OFDM uses complex equalizers.

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Q. When we divide band of Orthogonal Frequency Division Multiplexing (OFDM) into sub bands, it diminishes effects of __________

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Q. Common data rates of IEEE 802.11 OFDM are ____________

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Q. MIMO stands for _______

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Q. In MIMO, which factor has the greatest influence on data rates?

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Q. MIMO was initially developed in the year __________

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Q. MIMO is a smart antenna technology.

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Q. MIMO technology makes advantage of a natural radio wave phenomenon called _________

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Q. Which of the following technology does not use MIMO?

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