Tutorial on TDD Systems

Tutorial on TD
D Systems
FCC O
f
fic
e
o
f
Engineer
in
g and Techn
o
logy
Monday
,
De
cember
3, 2
0
01
Part 1: Overview
of Duplex Schemes
Rém
i
Cha
y
er
Chairman
TDD Coali
t
io
n
http:/
/w
w
w
.tddcoalition.
org
E-
ma
il:
rc
h
a
y
e
r@
h
a
rr
is
.co
mThe TD
D Coalition
It is th
e po
sition of
the TDD Coalition th
at
wi
th p
r
o
p
e
r
planning a
n
d

reg
u
lato
ry co
nside
r
ation
s
,
TDD and
oth
e
r
duple
x
ing
t
ech
nologies can
coe
x
ist in
the
sam
e
ge
og
ra
phic a
nd
spe
c
t
r
al spa
c
e
Aper
to Ne
t
w
orks
LinkAir
Malibu Netw
orks
Arra
y
c
omm
BeamRe
ach
Netw
or
ks
Na
v
i
ni Ne
tw
orks
Caly
Netw
orks
Pointred Te
c
hnologies
Radian
t Ne
t
w
ork
s
Clear
w
i
re Te
chnologies
Harri
s Corpo
r
a
t
ion
Raze
Techn
o
logies
InterDigi
t
al
Wa
v
i
on Ltd
IP Wireless
December 3,
2
0
0
1
2Overview of the Duplex Schemes
!
Definitions
"
FDD
"
TDD
"
Adaptive TD
D
!
Comparison of TDD
vs FDD
"
Spect
r
u
m
Efficiency
"
Spect
r
um All
o
cation and
Utilization
"
Deployment
and
Net
w
o
r
k Planning
Issu
es
"
Comp
atibility
wi
th
eme
r
ging applicatio
ns and
all-IP ne
t
w
o
r
ks
with
a
s
y
m
m
e
tr
i
c
tra
f
f
i
c
"
Adaptability to advance
d
signal pro
c
e
s
sing
(ada
ptive
anten
na
s,
use
r
t
e
rminal
beam
-f
ormin
g
, et
c.
)
"
Field trials
December 3,
2
0
0
1
3FDD –
F
requency Division Duplexing
!
Separ
a
te in frequency
the dow
n
stream and upstream
directions
of the traffic
!
Ratio betw
een dow
n
s
tream an
d upstream traffic fixed
by
...