Electrical Wiring: Residental - With Plans (Paperback) Package
18th Edition
ISBN: 9781305416376
Author: MULLIN
Publisher: Cengage
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Textbook Question
Chapter 1, Problem 6R
What phrase is used when a substitution is permitted for a specific item? __________
__________________________________________
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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
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.
Chapter 1 Solutions
Electrical Wiring: Residental - With Plans (Paperback) Package
Ch. 1 - What is the purpose of specifications?Ch. 1 - Refer to the specifications in the back of this...Ch. 1 - What is done to prevent a plan from becoming...Ch. 1 - Name three requirements contained in the...Ch. 1 - Prob. 5RCh. 1 - What phrase is used when a substitution is...Ch. 1 - What is the purpose of an electrical symbol?...Ch. 1 - Prob. 8RCh. 1 - Prob. 9RCh. 1 - What three parties must be satisfied with the...
Ch. 1 - Prob. 12RCh. 1 - Prob. 13RCh. 1 - Does the NEC provide minimum or maximum standards?...Ch. 1 - What do the letters UL signify?Ch. 1 - What section of the NEC states that all listed or...Ch. 1 - Prob. 17RCh. 1 - Prob. 18RCh. 1 - Does compliance with the NEC always result in an...Ch. 1 - Name two nationally recognized testing...Ch. 1 - Prob. 21RCh. 1 - Prob. 23RCh. 1 - A junction box on a piece of European equipment is...Ch. 1 - Prob. 25RCh. 1 - You will learn in Chapter 3 that residential...Ch. 1 - Prob. 27RCh. 1 - What can you do to reduce or eliminate the...Ch. 1 - What is the NEC definition of a qualified person?Ch. 1 - Are low-voltage systems totally safe? Explain.Ch. 1 - Prob. 32RCh. 1 - What do the letters PPE stand for?...Ch. 1 - Prob. 34RCh. 1 - Where might you obtain information about...Ch. 1 - Prob. 36R
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