b) a. You are to discuss the recompences that will compel one to adopt the orthogonal frequency division multiplexing (O

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B A You Are To Discuss The Recompences That Will Compel One To Adopt The Orthogonal Frequency Division Multiplexing O 1 (49.46 KiB) Viewed 57 times

b) a. You are to discuss the recompences that will compel one to adopt the orthogonal frequency division multiplexing (OFDM) for digital transmission network over channels subject to fading, and what is the main disadvantage of OFDM? Your submission should not be less than a page and half. Major Topic Frequency Division Multiplexing Blooms Designation AN Major Topic Based Band Modulation Score 7 Demonstrate your findings on bandwidth-efficiency of a digital communication system. Discuss the maximum-bandwidth efficiency achievable, in theory, by a base-band binary transmission system? Deliberate extensively on the rationale behind the difficult aspects in achieving maximum-bandwidth efficiency in practice? Outline in real terms the bandwidth efficiency of (i) Binary PSK with 100% RC pulse shaping (ii) QPSK with 50% RRC pulse-shaping (iii) 8-PSK with 50% RRC pulse-shaping (iv) OFDM of a transmission system at 250 k baud with 64 sub-carriers spanning a 20 MHz bandwidth. Assume that only 48 of the 64 sub-carriers are modulated (according to the IEEE802.11a standard) and that QPSK is used for each sub- carrier. Blooms Score Designation AP 7