Unformatted text preview: The block comprising the waveform modulator, the AWGN channel, and the waveform demodulator is equivalent to an AWGN vector channel (see lecture notes). Show that the components of the noise vector W = [ W 1 , W 2 , . . . , W D ] T are uncorre-lated, i.e., that E[ W j W k ] = 0 for j n = k . Remark: If the components are Gaussian and uncorrelated, they are independent. And thus, W is indeed a white Gaussian noise vector. Problem 3 (On-of keying) Consider a binary digital communication system employing the following mapping from source symbols to waveforms, where A > 0: m→ s 1 ( t ) := 0 , 1 m→ s 2 ( t ) := b A for t ∈ [0 , T ), otherwise. Repeat the questions from the BPAM problem above for this modulation scheme. BFl, TPe. Digital Modulation 1 NavCom...
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- Spring '10
- PULSE AMPLITUDE MODULATION, binary digital communication, AWGN vector channel