Communication Systems Cheat Sheet 2015 PDF

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Communication Systems -Cheat Sheet2015Acknowledgement/Color CodingIf you want to be acknowledged and want people to identify the colour of textyou use to put up your answers in this document then put your name down likethis:|The H Master||Nathanael Cesnak|Please make good use of the Comments feature...

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Communication Systems Cheat Sheet

2015 Acknowledgement/Color Coding If you want to be acknowledged and want people to identify the colour of text you use to put up your answers in this document then put your name down like this:

|The H Master| |Nathanael Cesnak| Please make good use of the Comments feature, and try not to delete anything, instead use strikethrough

Things we need to cover: 1. signum derivation

1 jπ

2. identities / shortcuts / modulation theorem

Inverse Fourier Transform

3. time domain to frequency domain conversions ( delays / scalings / phasors) 4. rect to sinc conversion and derivation

5. ideal channel / equaliser Ideal Channel

Ideal Equalizer

6. using a tapped line delay / transversal filter as an equaliser

7. Bandpass → Lowpass Frequency Domain

Time Domain

8. Lowpass → Bandpass Frequency Domain

Time Domain

9. Delays Group Delay

Phase Delay j θ(t)

When

t¿e , then s l (t)≡ a¿

y(t)

10. DSB-SC: modulation / demodulation / power / noise / snr derivations

Demodulation

11. Quadrature Carrier Multiplexing

12. SSB: modulation / demodulation (of both USB & LSB) / power / noise / snr derivations 13. VSB : modulation / demodulation / power / noise / snr derivations (i don’t think this will be on exam as it was covered in midsem and is quite a small area of focus) 14. AM: modulation / demodulation / power / noise / snr derivations

15. FM: modulation / demodulation / power / noise / snr derivations

16. Narrowband FM Generation / Frequency Multiplication (nonlinear devices) 17. FM Equations : Carson’s Rule / FOM

18. PAM / SQNR 19. diagrams of modulators/demodulators 20. Probability proofs/ derivations re WSS 21. PAM example / derivation somethign 22.

DSB is wrong

Note that the FOM of both DSB and SSB are the same. For the same received signal power & noise psd over the transmitted signal frequency band, DSBSC, SSB & baseband transmission have the same output SNR. (From lecture note pg. 260)...