WIMAX TESTBED
WiMAX, the Worldwide Interoperability for Microwave Access, is a telecommunications technology aimed at providing wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access. It is based on the IEEE 802.16 standard, which is also called Wi...
Saved in:
Main Author: | |
---|---|
Format: | Final Year Project |
Language: | English |
Published: |
Universiti Teknologi Petronas
2008
|
Subjects: | |
Online Access: | http://utpedia.utp.edu.my/7467/1/2008%20-%20Wimax%20testbed.pdf http://utpedia.utp.edu.my/7467/ |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
my-utp-utpedia.7467 |
---|---|
record_format |
eprints |
spelling |
my-utp-utpedia.74672017-01-25T09:45:26Z http://utpedia.utp.edu.my/7467/ WIMAX TESTBED KOH , MINGHAO TK Electrical engineering. Electronics Nuclear engineering WiMAX, the Worldwide Interoperability for Microwave Access, is a telecommunications technology aimed at providing wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access. It is based on the IEEE 802.16 standard, which is also called Wire IessMAN. The name WiMAX was created by the WiMAX Forum, which was formed in June 2001 to promote conformance and interoperability of the standard. The forum describes WiMAX as a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL. This Final Year Project attempts to simulate via Simulink, the working mechanism of a WiMAX testbed that includes a transmitter, channel and receiver. This undertaking will involve the baseband physical radio link. Rayleigh channel model together with frequency and timing offsets are introduced to the system and a blind receiver will attempt to correct these offsets and provide channel equalization. The testbed will use the Double Sliding Window for timing offset synchronization and the Schmid! & Cox algorithm for Fractional Frequency Offset estimation. The Integer Frequency Offset synchronization is achieved via correlation of the incoming preamble with its local copy whereas Residual Carrier Fr~quency Offset is estimated using the L th extension method. A linear Channel Estimator is added and combined with all the other blocks to form the testbed. From the results, this testbed matches the standard requirements for the BER when SNR is 18dB or higher. At these SNRs, the receiver side of the testbed is successful in performing the required synchronization and obtaining the same data sent. Sending data with SNR lower than 18dB compromises its performance as the channel equalizer is non-linear. This project also takes the first few steps of hardware implementation by using Real Time Workshop to convert the Simulink model into C codes which run outside MATLAB. In addition, the Double Sliding Window and Schmid! & Cox blocks are converted to Xilinx blocks and proven to be working like their Simulink counterparts. Universiti Teknologi Petronas 2008 Final Year Project NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/7467/1/2008%20-%20Wimax%20testbed.pdf KOH , MINGHAO (2008) WIMAX TESTBED. Universiti Teknologi Petronas. (Unpublished) |
institution |
Universiti Teknologi Petronas |
building |
UTP Resource Centre |
collection |
Institutional Repository |
continent |
Asia |
country |
Malaysia |
content_provider |
Universiti Teknologi Petronas |
content_source |
UTP Electronic and Digitized Intellectual Asset |
url_provider |
http://utpedia.utp.edu.my/ |
language |
English |
topic |
TK Electrical engineering. Electronics Nuclear engineering |
spellingShingle |
TK Electrical engineering. Electronics Nuclear engineering KOH , MINGHAO WIMAX TESTBED |
description |
WiMAX, the Worldwide Interoperability for Microwave Access, is a
telecommunications technology aimed at providing wireless data over long distances
in a variety of ways, from point-to-point links to full mobile cellular type access. It is
based on the IEEE 802.16 standard, which is also called Wire IessMAN. The name
WiMAX was created by the WiMAX Forum, which was formed in June 2001 to
promote conformance and interoperability of the standard. The forum describes
WiMAX as a standards-based technology enabling the delivery of last mile wireless
broadband access as an alternative to cable and DSL. This Final Year Project attempts
to simulate via Simulink, the working mechanism of a WiMAX testbed that includes
a transmitter, channel and receiver. This undertaking will involve the baseband
physical radio link. Rayleigh channel model together with frequency and timing
offsets are introduced to the system and a blind receiver will attempt to correct these
offsets and provide channel equalization. The testbed will use the Double Sliding
Window for timing offset synchronization and the Schmid! & Cox algorithm for
Fractional Frequency Offset estimation. The Integer Frequency Offset
synchronization is achieved via correlation of the incoming preamble with its local
copy whereas Residual Carrier Fr~quency Offset is estimated using the L th extension
method. A linear Channel Estimator is added and combined with all the other blocks
to form the testbed. From the results, this testbed matches the standard requirements
for the BER when SNR is 18dB or higher. At these SNRs, the receiver side of the
testbed is successful in performing the required synchronization and obtaining the
same data sent. Sending data with SNR lower than 18dB compromises its
performance as the channel equalizer is non-linear. This project also takes the first
few steps of hardware implementation by using Real Time Workshop to convert the
Simulink model into C codes which run outside MATLAB. In addition, the Double
Sliding Window and Schmid! & Cox blocks are converted to Xilinx blocks and
proven to be working like their Simulink counterparts. |
format |
Final Year Project |
author |
KOH , MINGHAO |
author_facet |
KOH , MINGHAO |
author_sort |
KOH , MINGHAO |
title |
WIMAX TESTBED |
title_short |
WIMAX TESTBED |
title_full |
WIMAX TESTBED |
title_fullStr |
WIMAX TESTBED |
title_full_unstemmed |
WIMAX TESTBED |
title_sort |
wimax testbed |
publisher |
Universiti Teknologi Petronas |
publishDate |
2008 |
url |
http://utpedia.utp.edu.my/7467/1/2008%20-%20Wimax%20testbed.pdf http://utpedia.utp.edu.my/7467/ |
_version_ |
1739831467367727104 |
score |
13.19449 |