ELEC 350 Assignment 2 2015
Read course notes pages up to page 23.
1. Consider the radio receiver in section 1.3.2.
Find an expression for the the I and Q outputs of the receiver.
Assume that f LO fc , fc f LO fb 0
Assume the signal has a general complex e
ELEC 350 Assignment 3
1. Consider the general complex IQ signal from Assignments 1 and 2
s(t ) a(t )e j (t ) e j 2 fct
a(t ) cos[2 f ct (t )] ja(t )sin[2 f ct (t )]
The real part is s(t ) a(t ) cos(2 fct (t ) . We can use a(t ) and/or (t ) or some combin
ELEC 350 Assignment 2 2015
Read course notes section 1.3 and review sections 1.1 and 1.2 as needed.
1. Consider the radio receiver in section 1.3.2.
Find an expression for the the I and Q outputs of the receiver.
Assume that f LO fc , fc f LO fb 0
Assume
ELEC 350 Assignment 1 2015
Read course notes pages 4-16.
Consider the radio receiver in section 1.2.2.
Find an expression for the the I and Q outputs of the receiver, writing the input RF signal as
r(t ) a(t )e j (t )e j 2 fct a(t ) cos[2 fct (t )] ja(t )
Exercise Answer Book for
Software Receiver Design
Qingxiong Deng, Jason Pagnotta, Nick Xenias, and Andrew G. Klein
February 7, 2011
Contents
2
A Telecommunication System
1
3
The Six Elements
5
4
Modeling Corruption
25
5
Analog (De)modulation
39
6
Sampling
ELEC 350 Assignment 1
This assignment refers to the lab 0 document that includes theory on the Softrock analog IQ receiver.
1. Find an expression for the I and Q outputs I (t ), Q(t ) of the Softrock analog IQ receiver for a
general signal r (t ) a(t ) co
ELEC 350 Midterm Exam #2 15 November 2013 page 1
Closed book, no computing/internet devices, non-programmable calculator OK, total marks 28
Question 1
Consider a complex QPSK signal in complex notation at a non-zero carrier frequency. Assume a
rounded pul
ELEC 350 Assignment 2 2015
Read course notes pages up to page 23.
1. Consider the radio receiver in section 1.3.2.
Find an expression for the I and Q outputs of the receiver.
Assume that f LO fc , fc f LO = fb 0
Assume the signal has a general complex env
ELEC 350 Assignment 5 - 2015
Readings for this assignment: text section 5
Question 1
Build a GNURadio FM receiver with the RTL stick.
Submit (4 marks)
a printout of the FM receiver flowgraph,
plot of I and Q signals in XY mode.
For FM signal before demod
ELEC 350 Assignment 5 solutions
1. For the 4 flowgraphs in the lab manual section 6.1.2, draw a block diagram including
mathematical description of the signals at each point.
C(t)
A(t)
B(t)
C(t)
E(t)
D(t)
F(t)
G(t)
BSPK real
A(t ) sin 2 f c t , f c 16 KHz
ELEC 350 Communications-I
Solution for Mid-term Paper
Question 1:
Can the UVic FM radio station CFUV be received in Seattle? Assume transmit power
of 1000 watts, carrier frequency 100 MHz, distance 200km, transmit antenna height 20
meters, transmit antenn
ELEC3502006MidtermSolution
Instructor: Prof. Peter F. Driessen Marker: Pengfei Zhang , Peng Lu
Question 1
Question 1.1 - (2 marks)
If a 10 Mbit/sec radio link has a link margin of 6 dB, what is the maximum data
rate that can be achieved ?
1. 2.5 Mbit/sec
UNIVERSITY OF VICTORIA
MIDTERM EXAMINATIONS NOVEMBER 2008
ELEC 350 COMMUNICATIONS THEORY AND SYSTEMS: I
TO BE ANSWERED IN BOOKLETS
TIME: 1 hour
INSTRUCTOR: Dr. P. F. Driessen
NO. OF PROBLEMS: 4
CANDIDATES ARE NOT PERMITTED ANY REFERENCE MATERIAL.
NON-PROG
UNIVERSITY OF VICTORIA
MIDTERM EXAMINATIONS NOVEMBER 1996
ELEC 350 COMMUNICATIONS THEORY AND SYSTEMS: I
TO BE ANSWERED IN BOOKLETS
TIME:
INSTRUCTOR:
NO. OF PROBLEMS
1 hour
Dr. P. F. Driessen
4
THIS EXAMINATION CONSISTS OF 1 PAGE OF QUESTIONS
PLEASE CHECK
ELEC350Assignment4
Instructor: Prof. Peter F. Driessen
Derivethe'dB'versionofthepathloss L0 fromthelossequationfor
freespace.
Sol: The loss equation for free space is
4 d
(1)
2
L0 =
Take logarithm on both sides, we have
c
L0 ( dB ) = 20log10 ( 4 )
ELEC 350 Assignment 5 solutions
1. For the 4 flowgraphs in the lab manual section 6.1.2, draw a block diagram including
mathematical description of the signals at each point.
C(t)
A(t)
B(t)
T
e
xt
C(t)
E(t)
D(t)
F(t)
G(t)
BSPK real
A(t ) sin 2 f c t , f c
ELEC 350 Assignment 4 2015
Question 1
Build a GNURadio AM receiver with the RTL stick.
Submit (4 marks)
a printout of the AM receiver flowgraph,
The figure below was taken from the Lab manual tutorial 3B. Replace the File Source with an
RTL source.
plot
ELEC350Assignment4
Instructor: Prof. Peter F. Driessen
Derivethe'dB'versionofthepathloss L0 fromthelossequationfor
freespace.
Sol: The loss equation for free space is
4 d
(1)
2
L0 =
Take logarithm on both sides, we have
c
L0 ( dB ) = 20log10 ( 4 )
ELEC350Assignment5solutions
1. For the 4 flowgraphs in the lab manual section 6.1.2, draw a block diagram including
mathematical description of the signals at each point.
2. For a real QPSK signal for a particular time instant we can write
where (see PSK
ELEC 350 Midterm Exam # 1
9 October 2013
Closed book, no computing/internet devices, non-programmable calculator OK, total marks 36
Consider an Amplitude modulated (AM) signal s(t) at carrier frequency = 10 MHz with a specific
message
1. (8 marks) Find th
ELEC 350 Assignment 3 2015
1. Consider the general complex IQ signal from Assignments 1 and 2
s(t ) a(t )e j (t ) e j 2 fct
a(t ) cos[2 f ct (t )] ja(t )sin[2 f ct (t )]
The real part is s(t ) a(t ) cos(2 fct (t ) . We can use a(t ) and/or (t ) or some c
ELEC 350 Assignment 5 - 2015
Readings for this assignment: text section 5
Question 1
Build a GNURadio FM receiver with the RTL stick.
Submit (4 marks)
a printout of the FM receiver flowgraph,
plot of I and Q signals in XY mode.
For FM signal before demod
ELEC 350 Assignment 5 - 2015
Readings for this assignment: text section 5
Question 1
Build a GNURadio FM receiver with the RTL stick. A good starting point is the file
wfm_rx4.grc . Use the FM demodulator design on pages 101-102 of the text.
Look for FM s
ELEC-350 - Assignment 7 2015
November 12, 2015
Problem 1: 4 marks
Derive the dB version of the path loss (L0 ) from the loss equation for free space.
Problem 2: 4 marks
Show that the two formulas for path loss give the same result at the breakpoint
distan
ELEC 350 Assignment 4 2015
Question 1
Build a GNURadio AM receiver with the RTL stick. A good starting point is the AM receiver
created previously in Lab 1 Tutorial 3A. Replace the file source with the RTL source, delete the
throttle, and set the RTL samp
ELEC350Assignment4 7
Instructor: Prof. Peter F. Driessen
Derivethe'dB'versionofthepathloss L0 fromthelossequationfor
freespace.
Sol: The loss equation for free space is
2
4 d
(1)
L0 =
Take logarithm on both sides, we have
c
L0 ( dB ) = 20log10 ( 4
ELEC 350 Assignment 7 2015
1. Read Text section 6.3.2. (4 marks)
a. Differentially encode the message 1110010.
b. Do it two different ways.
c. Differentially decode the answers to a and b above and show they
ELEC 350 Assignment 6 2015
Problem 1
Consider narrowband FM transmission where beta < 1 and a general message m(t). Find an
expression for i(t) and q(t).
Solution
t
s(t ) Ac cos 2 f ct 2 k f m( )d
0
The FM signal s(t ) can be written in standard IQ forma
ELEC 350 Assignment 1 2015
Read course notes pages 4-16.
1. Consider the radio receiver in section 1.2.2.
Find an expression for the the I and Q outputs of the receiver, writing the input RF signal as
r(t ) a(t )e j (t )e j 2 fct a(t ) cos[2 fct (t )] ja(