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Which among the following replaces the static sine pulses of OFDM to improve flexibility?(a) Wavelet bases(b) Triangular pulses(c) Impulse bases(d) Ramp pulsesI have been asked this question in a job interview.The origin of the question is Next Generation Wireless Network in section Next Generation Wireless Network of Cognitive Radio

Answer»

Right answer is (a) Wavelet bases

To elaborate: In multi-carrier wavelet packet modulation, wavelet bases replace the static sine/cosine pulses of OFDM. This TECHNIQUE provides HIGHER sideband SUPPRESSION. It also reduces inter-channel INTERFERENCE and inter-symbol interference.



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