Recent content by McMurry

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Homework Statement I used MATLAB to perform simulation on 8psk modulation, and this is the result i obtained. I would need your help to help me to verify whether the result I obtained is valid. Thanks. [PLAIN]http://img132.imageshack.us/img132/8124/8pskverification.jpg Homework...

hi guys, thanks for the reply. the purpose is to observe the symmetry property of Fourier transform and also to explain the spikes that is occurring.

do you mean that the reason is because we can't log (0)? is that the only reason we are adding 1 to the log? thanks.

I have run the following command: c = wavread('sample.wav'); amplitude = log (abs(fft(c))); and obtained the following plot: http://img179.imageshack.us/img179/8733/withoutplusone.jpg however, i was told to use this instead: amplitude = log (1+abs(fft(c))); and obtained the...

Ops. PAM = pulse amplitude modulation for digital communication.

Homework Statement Just came across the statement that PAM is not very good for long-distance transmission. Why is it so? Thanks. Homework EquationsThe Attempt at a Solution Is it because the output is of infinite length?

Homework Statement The Vdc of Full Wave Rectifier (with diode) with midpoint configuration has been found to be 2Vm/(pi) and Vrms = Vm/sqrt(2) How about the Vdc and Vrms value for the full wave rectifier but with bridge configuration. The difference is the the peak inverse voltage...

Homework Statement I've gone through two different books... and both give a different circuit for the buck chopper. Is the one with RLE load is totally same like the one with a capacitor in parallel with the resistive load? hxxp://img181.imageshack.us/my.php?image=chopper1pp2.jpg...