Objective and Focus
Learn how MATLAB can be used efficiently in order to perform tasks in
digital signal processing and digital communications
Learn something about state-of-the-art digital communications systems and
how to simulate/analyze their performance
Focus
Wireless multi-carrier transmission system based on Orthogonal
Frequency-Division Multiplexing (OFDM) including
I
a simple channel coding scheme for error correction
I
interleaving across subcarriers for increased frequency diversity
OFDM is extremely popular and is used in e.g.
I
Wireless LAN air interfaces (Wi-Fi standard IEEE 802.11a/b/g, HIPERLAN/2)
I
Fixed broadband wireless access systems (WiMAX standard IEEE 802.16d/e)
I
Wireless Personal Area Networks (WiMedia UWB standard, Bluetooth)
I
Digital radio and digital TV systems (DAB, DRM, DVB-T, DVB-H)
I
Long-term evolution (LTE) of third-generation (3G) cellular systems
I
Cable broadband access (ADSL/VDSL), power line communications
Jan Mietzner (janm@ece.ubc.ca) MATLAB Tutorial October 15, 2008 1
Objective and Focus
Learn how MATLAB can be used efficiently in order to perform tasks in
digital s ignal processing and digital communications
Learn something about state-of-the-art digital communications systems and
how to simulate/analyze their performance
Focus
Wireless multi-carrier transmission system based on Orthogonal
Frequency-Division Multiplexing (OFDM) including
I
a simple channel coding scheme for error correction
I
interleaving across subcarriers for increased frequency diversity
OFDM is extremely popular and is used in e.g.
I
Wireless LAN air interfaces (Wi-Fi standard IEEE 802.11a/b/g, HIPERLAN/2)
I
Fixed broadband wireless access systems (WiMAX standard IEEE 802.16d/e)
I
Wireless Personal Area Networks (WiMedia UWB standard, Bluetooth)
I
Digital radio and digital TV systems (DAB, DRM, DVB-T, DVB-H)
I
Long-term evolution (LTE) of third-generation (3G) cellular systems
I
Cable broadband access (ADSL/VDSL), power line communications
Jan Mietzner (janm@ece.ubc.ca) MATLAB Tutorial October 15, 2008 1
Objective and Focus
Learn how MATLAB can be used efficiently in order to perform tasks in
digital s ignal processing and digital communications
Learn something about state-of-the-art digital communications systems and
how to simulate/analyze their performance
Focus
Wireless multi-carrier transmission system based on Orthogonal
Frequency-Division Multiplexing (OFDM) including
I
a simple channel coding scheme for error correction
I
interleaving across subcarriers for increased frequency diversity
OFDM is extremely popular and is used in e.g.
I
Wireless LAN air interfaces (Wi-Fi standard IEEE 802.11a/b/g, HIPERLAN/2)
I
Fixed broadband wireless access systems (WiMAX standard IEEE 802.16d/e)
I
Wireless Personal Area Networks (WiMedia UWB standard, Bluetooth)
I
Digital radio and digital TV systems (DAB, DRM, DVB-T, DVB-H)
I
Long-term evolution (LTE) of third-generation (3G) cellular systems
I
Cable broadband access (ADSL/VDSL), power line communications
Jan Mietzner (janm@ece.ubc.ca) MATLAB Tutorial October 15, 2008 1
System Overview
IFFT
CP
FFTP/S
InterleavingChannel Enc.
response AWGN
Channel impulse
S/P
Channel Dec. Deinterleaving
Channel
CP
Transmitter
Receiver
h + n
U
X
x
y
ˆ
U
Y
N
c
: number of orthogonal carriers (N
c
:= 2
n
); corresponds to (I)FFT size
R: code rate of employed channel code (R := 1/2
m
≤ 1)
U: vector of info symbols (length RN
c
),
ˆ
U: corresponding estimated vector
X: transmitted OFDM symbol (length N
c
), Y: received OFDM symbol
⇒ We will consider each block in detail, especially their realization in MATLAB
Jan Mietzner (janm@ece.ubc.ca) MATLAB Tutorial October 15, 2008 2
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