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