




Students fill in missing lines of code to create a Matlab simulation of a foursymbol frequency shift keying (FSK) transmitter. Students are encouraged to change the symbol period and observe the change in the transmitted signal's spectrum.
Prelab: matlab preparation
We have made considerable use of Matlab in previous labs to
design filters and determine frequency responses of systems.Matlab is also very useful as a simulation tool.
Use the following Matlab code skeleton to simulate your system
and fill in the incomplete portions. Note that the code is notcomplete and will not execute properly as written. How does the
spectrum of the transmitted signal change with
${T}_{\mathrm{symb}}$ ?
lab_5_prelab.m
1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2 % Matlab code skeleton for Digital Transmitter
3
4 close all;clear;
5
6 % Generate random bits
7 bits_per_symbol=2;
8 num_symbols=64;
9 numbits=bits_per_symbol*num_symbols;
10 bits=rand(1,numbits)>0.5;
11
12 Tsymb=32; % samples per symbol
13
14
15 % These are the 4 frequencies to choose from
16 % Note that 32 samples per symbol does not correspond to
17 % an integer number of periods at these frequencies
18 omega1 = 9*pi/32;
19 omega2 = 13*pi/32;
20 omega3 = 17*pi/32;
21 omega4 = 21*pi/32;
22
23
24 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
25 % Transmitter section
26
27 % Initialize transmit sequence
28 index=1; % Initialize bit index
29 n=1; % Initialize sample index
30 phi=0; % Initialize phase offset
31
32 % Generate 64 32sample symbols
33 while (n<=num_symbols*Tsymb)
34
35 if (bits(index:index+1) == [0 0])
36 sig(n:n+Tsymb1) = sin(omega1*[0:Tsymb1]+phi);
37 phi = omega1*Tsymb+phi; % Calculate phase offset for next symbol
38 phi = mod(phi, 2*pi); % Restrict phi to [0,2*pi)
39
40 % > Insert code here <%
41
42 end % end ifelse statements
43
44 index=index+2; % increment bit counter so we look at next 2 bits
45
46 n=n+Tsymb;
47 end % end while
48
49
50 % Show transmitted signal and its spectrum
51 % > Insert code here <%
Questions & Answers
where we get a research paper on Nano chemistry....?
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
is there industrial application of fullrenes.
What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest.
Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.?
How this robot is carried to required site of body cell.?
what will be the carrier material and how can be detected that correct delivery of drug is done
Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
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Source:
OpenStax, Ece 320 spring 2004. OpenStax CNX. Aug 24, 2004 Download for free at http://cnx.org/content/col10225/1.12
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