MATLAB: AN INTRODUCTION WITH APPLICATIO
6th Edition
ISBN: 9781119626596
Author: GILAT
Publisher: WILEY
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Chapter 6, Problem 9P
Write a program that asks the user to input a
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4. A battery operated sensor transmits to a receiver that is plugged in to a power outlet. The device is
continuously operated. The battery is a 3.6 V coin-cell battery with a 245mAHr capacity.
The application requires a bit rate of 36 Mbps and an error rate of less than 10^-3. The channel has a
center frequency of 2.4 GHz, a bandwidth of 10 MHz and a noise power spectral density of 10^-14
W/Hz. The maximum distance is 36 meters and the losses in the channel attenuates the signal by 0.25
dB/meter.
Your company has two families of chips that you can use. An M-ary ASK and an M-ary QAM chip. The
have very different power requirements as shown in the table below.
The total current for the system is the current required to achieve the desired Eb/No PLUS the current
identified below:
Hokies PSK Chip Set Operating Current NOT Including
the required Eb/No for the application
Hokies QAM Chip Set Operating Current NOT Including
the required Eb/No for the application
Chip ID
M-ary
Voltage (volts)…
Using the 802.11a specifications given below, in Matlab (or similar tool) create the time domain signal
for one OFDM symbol using QPSK modulation. See attached plot for the QPSK constellation.
Your results should include the power measure in the time and frequency domain and comment on
those results.
BW
802.11a OFDM PHY Parameters
20 MHZ
OBW
Subcarrer Spacing
Information Rate
Modulation
Coding Rate
Total Subcarriers
Data Subcarriers
Pilot Subcarriers
DC Subcarrier
16.6 MHZ
312.5 Khz (20MHz/64 Pt FFT)
6/9/12/18/24/36/48/54 Mbits/s
BPSK, QPSK, 16QAM, 64QAM
1/2, 2/3, 3/4
52 (Freq Index -26 to +26)
48
4 (-21, -7, +7, +21)
*Always BPSK
Null (0 subcarrier)
52 subarriers
-7
(48 Data, 4 Pilot (BPSK), 1 Null)
-26 -21
0
7
21 +26
14
One Subcarrier
1 OFDM symbol
1 OFDM Burst
-OBW 16.6 MHz
BW 20 MHZ
1 constellation point
= 52 subcarriers
= one or more OFDM symbols
802.11a OFDM Physical Parameters
Show signal at this point
x bits
do
Serial
Data
d₁
S₁
Serial-to-
Input
Signal
Parallel
Converter
IFFT…
Find Vb and Va using Mesh analysis
Chapter 6 Solutions
MATLAB: AN INTRODUCTION WITH APPLICATIO
Ch. 6 - Prob. 1PCh. 6 - Given: d=6e=4f=2 . Evaluate the following...Ch. 6 - Given: v=[-2 4 1 0 2 1 2] and w=[2 50 1 2 1 3]....Ch. 6 - Use the vectors v and w from Problem 3. Use...Ch. 6 - Evaluate the following expressions without using...Ch. 6 - Use loops to create a 46 matrix in which the value...Ch. 6 - Write a program that generates a vector with 30...Ch. 6 - Write a program that asks the user to input a...Ch. 6 - Write a program that asks the user to input a...Ch. 6 - The daily high temperature (°F) in New York City...
Ch. 6 - The Pascal triangle can be displayed as elements...Ch. 6 - Fibonacci numbers are the numbers in a sequence in...Ch. 6 - The reciprocal Fibonacci constant ?is defined by...Ch. 6 - The value of p can be estimated from:...Ch. 6 - The value of p can be estimated from the...Ch. 6 - Write a program that (a) generates a vector with...Ch. 6 - A vector is given by x= [9 -1.5 13.4 13.3 -2.1 4.6...Ch. 6 - The Pythagorean theorem states that a2+ b2= c2....Ch. 6 - Write a MATLAB program in a script file that finds...Ch. 6 - A safe prime is a prime number that can be written...Ch. 6 - Sexy primes are two prime numbers that the...Ch. 6 - A Mersenne prime is a prime number that is equal...Ch. 6 - A perfect number is a positive integer that is...Ch. 6 - A list of exam scores (S) (in percent out of 100%...Ch. 6 - The Taylor series expansion for axis:...Ch. 6 - Write a MATLAB program in a script file that finds...Ch. 6 - The following are formulas for calculating the...Ch. 6 - Body mass index (BMI) is a measure of obesity. In...Ch. 6 - Write a program in a script file that calculates...Ch. 6 - Write a program that determines the change given...Ch. 6 - The concentration of a drug in the body CPcan be...Ch. 6 - One numerical method for calculating the cubic...Ch. 6 - Write a program in a script file that converts a...Ch. 6 - In a one-dimensional random walk, the position x...Ch. 6 - The Sierpinski triangle can be implemented in...Ch. 6 - The roots of a cubic equation a3x3+a2x2+a1x+a0=0...Ch. 6 - The overall grade in a course is determined from...Ch. 6 - A Keith number is a number (integer) that appears...Ch. 6 - The following MATLAB commands create a sine-shaped...
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- 1. The communication channel bandwidth is 25 MHz centered at 1GHz and has a noise power spectral density of 10^-9 W/Hz. The channel loss between the transmitter and receiver is 25dB. The application requires a bit rate of 200Mbps and BER of less than 10^-4. Excluding Mary FSK, Determine the minimum transmit power required.arrow_forward2. An existing system uses noncoherent BASK. The application requires a BER of <10^-5. The current transmit power is 25 Watts. If the system changes to a coherent BPSK modulation scheme, what is the new transmit power required to deliver the same BER?arrow_forward3. You are to design a 9-volt battery operated communication system that must last 3 years without replacing batteries. The communication channel bandwidth is 100 KHz centered at 5.8 GHz. The application requires a BER of <10^-5 and a data rate of 1 Mbps. The channel can be modeled as AWGN with a noise power spectral density of 10^-8 W/Hz. ((a) What modulation scheme would you use? B) what is the required capacity of the batteries? and (c) is the battery commercially available?arrow_forward
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