Homework Assignments
(LAST UPDATE: April 20, 2015)
HW1: due Monday Feb 2nd Solution
Set | Problem | Principle |
---|---|---|
1 |
1.4 |
point to point tower |
1 |
1.5 |
LOS Cell Tower |
1 |
1.9 |
Binary system Entropy |
1 |
1.12 |
Information rate |
1 |
1.16c |
Telephone line information rate |
1 |
2-4 |
Rms, power,DC of a waveform |
1 |
2-5 |
Energy of a waveform |
HW2: due Monday Feb 9th Solution
Set | Problem | Principle |
---|---|---|
2 |
2-11 |
Receiver input power, uV, dBm |
2 |
2-16 |
Spectrum of gaus pulse |
2 |
2-19 |
Spectra using transform Table 2-2, and superposition property from Table 2-1 |
2 |
2-20 |
Transforms with scaling and time shifting (Table 2-1) |
2 |
2-58 |
Complex Fourier series coeffs 2/3 duty cycle |
HW3: due Friday the 27th Solution
Set | Problem | Principle |
---|---|---|
3 |
2-61 |
Use 2-89 |
3 |
Additional work withprob 2-61 |
For 2-61: let A=1, b/T=.2, find 1) The total power from the time waveform 2) The percent of total power in the fundamental 3) The percent of total power just the AC components |
3 |
2-70 |
repetitive triangle- (observe the 1/n2 spectrum compared to square wave 1/n ) |
3 |
2-80 |
Energy of a pulse through a filter |
3 |
2-85 |
comb filter- used in radar and digital communications |
HW4: due Wednesday Feb 4th
Set | Problem | Principle |
---|---|---|
4 |
3-3 |
Natural Sampling PAM spectrum |
4 |
3-4 |
Flat-top or impulse sampling PAM spectrum |
4 |
3-9 |
PCM accuracy |
4 |
3-10 |
PCM bit rate, file size ( average S/N use eq 3-17b for M) |
|
3-10 hint |
Find M, then R bit rate, then R byte rate (8 bit/byte), then total time (answer=2333 min) |
HW5: due Monday April 6th
Set | Problem | Principle |
---|---|---|
5 |
3-21 |
Multi-level PAM (buad rate is symbol rate) |
5 |
3-39 |
Multilevel PCM bit and baud rate |
5 |
3-42a |
Raised cosine-rolloff filter, ISI (3-74) |
5 |
3-50 |
PCM Bit rate for given BW with raised cosine-rolloff (3-74) |
5 |
3-51 |
Muliti-level PCM with raised cosine-rolloff |
HW6: Due Monday April 13
Set | Problem | Principle |
---|---|---|
6 |
3-62 |
TDM PAM |
6 |
3-64 |
TDM PCM |
6 |
4-4 |
DSB-SC spectrum- label important frequencies |
6 |
4-5 |
avg power and PEP of DSB-SC |
|
|
|
HW7: Due Friday April 17th
Set | Problem | Principle | ||
---|---|---|---|---|
7 |
5-1 |
AM signals and characteristics- Pavg, PEP, spectrum |
||
7 |
5-4 |
AM envelope, modulation percent |
||
7 |
5-10 bcd only |
DSB Pavg, PEP (hint PEP=(Amax^2)/2) |
||
7 |
5-24 |
Phase and frequency deviation of FM signal |
||
7 |
5-29 |
Carson's rule for FM bandwidth |
HW8: Due Friday April 27th
Set | Problem | Principle |
---|---|---|
8 |
5-39 |
FM specta (hint look at student solution of 5-37 for procedure) |
|
|
Bessel order in Carson's BW: n=6 |
8 |
5-56 |
Digital BPSK (use 5-2, 5-79) don’t compare to 5-55 |
8 |
7-32abc |
OOK,polar, BPSK, BER eq7-26b,7-33,7-58,7-38, table7-1 |
|
|
fig 7-14, see appendix a-10, and appendix figure B-7
|
8 |
8-7 |
parabolic antenna gain and link budget (-76.7dBm) table 8-4 |
8 |
8-9 |
ant gain, EIRP, free space path loss (student solution guide) section 8-6 |