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Digital Wireless Communication (radio channel # (communication networks,…
Digital Wireless Communication
transmitter
#
techniques
data compression
preserves useful information
data rate reduction
error correction
codewords
errorproof
Claude Shannon theory
channel capacity
error correction algorithm
turbo coders
UMTS
HSPA
modulation
BPSK
amplitude modulation
+1
-1
phase modulation
0 degree
360 degrees
QPSK
amplitude modulation
symbols
complex numbers
real
in-phase(I)
imaginary
quadrature(Q)
phase modulation
45 degrees
135 degrees
225 degrees
315 degrees
multiple access
FDMA
different frequency
TDMA
different time
CDMA
same frequency
same time
unique code
larger no. of mobiles
diversity processing
more power
less fading
multiple copies of signal
examples
receive antenna diversity
polarization diversity
transmit antenna diversity
radio channel
#
medium
modifies & distorts signal
fading
interference
destructive
.
constructive
fades
low values
multipath
Rayleigh fading
propagation loss
signal power reduction
noise
thermal noise
interference
communication networks
fixed line telephone systems
internet
mobile telecom system OR mobile communication network
public land mobile network
o2
Vodafone
1G
NMT
AMPS
TACS
2G
Global System for
Mobile Communications
(GSM)
SIM
#
EDGE
GPRS
short message service
(SMS)
cdmaOne
IS-95
IS-95B
D-AMPS
IS-136
IS-54
iDEN
PDC
3G
UMTS
architecture
radio access network
UMTS terrestrial radio
access network (UTRAN)
Node B
2 more items...
radio network
controller (RNC)
2 more items...
interface
lu-CS
lu-PS
soft handover
active set
base stations
base station
subsystem (BSS)
2 more items...
interface
cells
pico cells
micro cells
macro cells
air interface
up link
down link
user equipment
mobile equipment
(ME)
mobile termination
(MT)
terminal equipment
(TE)
handover
roaming
universal integrated
circuit card (UICC)
subscriber identity
module (SIM)
universal subscriber
identity module (USIM)
.
Uu
core network
circuit switching
public switched
telephone networks (PSTNs)
mobile switching
centre (MSC)
1 more item...
home location
register (HLR)
.
packet switching
.
2 more items...
packet data
network (PDNs)
1 more item...
serving GPRS
support node (SGSN)
gateway GPRS
support node (GGSN)
approaches
2 more items...
enhancements
release 5
IP multimedia
subsystem (IMS)
Home subscriber
server (HSS)
luFlex
release 4
bearer independent
circuit switched core
network
circuit switched
media gateway (CS-MGW)
GSM EDGE radio
access network (GERAN)
lur-g
release 6
wireless local
area network (WLAN)
interworking
WLAN access
gateway (WAG)
packet data
gateway (PDG)
3rd Generation Partnership
Project (3GPP)
#
European Telecommunications
Standards Institute (ETSI)
project co-ordination group (PCG)
4 Technical specification
groups (TSGs)
Services and system aspects
(TSG SA)
Core network and terminals
(TSG CT)
Radio access network
(TSG RAN)
GSM EDGE radio access network
(TSG GERAN)
communications protocol
open systems interconnection
application layer / layer 7
HTTP
SMTP
presentation layer
session layer
transport layer
connection-oriented protocol i.e. transmission control protocol
connectionless protocol i.e. user datagram protocol
link layer
ethernet
point-to-point protocol
vertical interactions
service data unit
protocol data unit
horizontal
physical layer
network layer
internet protocol
Internet protocol stack
asynchronous transfer mode
physical layer
ATM layer
ATM adaptation layer
SS7
ISDN user part
telephone user part
transaction capabilities application part
message transfer part
signalling connection control part
receiver
'
signal
#
develop
