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Which channel indicates the number of symbols used by the PDCCH?

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Which channel indicates the number of symbols used by the PDCCH?

(a) PHICH

(b) PDCCH

(c) PBCH

(d) PCFICH

This question was addressed to me by my college director while I was bunking the class.

My question is based upon Long Term Evolution (LTE) in portion 4G of Wireless/Mobile

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Best answer
Right option is (d) PCFICH

Easy explanation: PCFIH channel indicates the number of symbols used by the PDCCH. The actual number of OFDM symbols occupied in any given subframe is indicated in the PCFICH (Physical Control Format Indicator Channel), which is located in the first OFDM symbol of each subframe.

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