Multi carrier and spread spectrum systems phần 3 ppsx
Multi carrier and spread spectrum systems phần 3 ppsx
... generation for one user
Multi- Carrier Spread Spectrum 43
data symbols
spread data symbols
spreading code
serial-
to-
parallel
converter
01
•
L − 1
sub -carrier
f
0
sub -carrier
f
1
sub -carrier
f
N
c
−1
01
•
L ... vol. 30 , pp. 9 13 924,
May 1982.
[31 ] Kondo S. and Milstein L.B., “On the use of multicarrier direct sequence spread spectrum systems, ” in
Proc. IEEE Milit...
Multi carrier and spread spectrum systems phần 5 ppsx
... constellation and FEC scheme but also on the amount of reference
and pilot symbols spent to guarantee reliable synchronization and channel estimation.
Multi- Carrier and Spread Spectrum Systems K. Fazel and ... 679–691,
April 2000.
Multi- Carrier Modulation and Demodulation 121
Total channel bandwidth
Guard band
DC sub -carrier
(not used)
Unused sub-carriers
i.e.Virtu...
Multi carrier and spread spectrum systems phần 7 ppsx
... E
b
/N
0
at
BER = 10
−9
( 23, 17) (31 ,25) 53 bytes 0.596 4.5 dB
(16,15)(64,57) 106 bytes 0. 834 6.2 dB
(56,49) (32 ,26) 159 bytes 0.711 3. 8 dB
(49,42) (32 ,31 ) 159 bytes 0.827 6.5 dB
( 43, 42) (32 ,31 ) 159 bytes 0.945 ... performance of multi- carrier and
multi- carrier CDMA transmission with a high number of sub-carriers in the presence of
low cost oscillators with phase noise...
Multi carrier and spread spectrum systems phần 2 docx
... Proceedings of the 3rd International Workshop on Multi- Carrier Spread- Spectrum &
Related Topics (MC-SS’01).
[22] Fazel K. and Kaiser S. (eds), Special Issue on Multi- Carrier Spread Spectrum and Related ... combination of DS-CDMA and multi- carrier
modulation was proposed in 19 93 [6][11][19][21] [31 ][45][50]. Two different realizations
of multiple access exploit...
Multi carrier and spread spectrum systems phần 4 pdf
... adjacent
Multi- Carrier and Spread Spectrum Systems K. Fazel and S. Kaiser
20 03 John Wiley & Sons, Ltd ISBN: 0-470-84899-5
MC-CDMA 77
024
6
8 101214
16
18 20
E
b
/N
0
in dB
10
−5
10
−4
10
3
10
−2
10
−1
10
0
BER
MRC
EGC
ZF
MMSE
MC-CDMA ... T
s
=
N
c
T
d
L
.(2. 93)
With multi- carrier direct sequence spread spectrum, each data symbol is spread over L
multi- ca...
Multi carrier and spread spectrum systems phần 6 docx
... dB 13. 0 dB 16.7 dB
5/6 13. 5 dB 14.4 dB 19 .3 dB
7/8 13. 9 dB 15.0 dB 22.8 dB
1/2 14.4 dB 14.7 dB 16.0 dB
2 /3 16.5 dB 17.1 dB 19 .3 dB
64-QAM 3/ 4 18.0 dB 18.6 dB 21.7 dB
5/6 19 .3 dB 20.0 dB 25 .3 dB
7/8 ... 3. 1 dB 3. 6 dB 5.4 dB
2 /3 4.9 dB 5.7 dB 8.4 dB
QPSK 3/ 4 5.9 dB 6.8 dB 10.7 dB
5/6 6.9 dB 8.0 dB 13. 1 dB
7/8 7.7 dB 8.7 dB 16 .3 dB
1/2 8.8 dB 9.6 dB 11.2 dB
2 /3 11.1 d...
Multi carrier and spread spectrum systems phần 8 ppt
... current and future standards (4G) is plotted. The current 2G GSM
system provides high mobility but a low data rate. 3G systems provide similar mobility as
Multi- Carrier and Spread Spectrum Systems ... pp. 32 8 35 3, March 1980.
[ 83] Wang X. and Liu K.J.R., “Adaptive channel estimation using cyclic prefix in multi- carrier modulation
system,” IEEE Communications Letters,...
Multi carrier and spread spectrum systems phần 9 docx
... T
s
T
G
= 1 /32 T
s
α = 0.25
1/2 0.66 0.69 0. 83
QPSK
3/ 4 0.99 1. 03 1.25
1/2 1 .32 1 .37 1.67
Channel spacing 1 16-QAM
3/ 4 1.98 2.06 2.50
1/2 1.98 2.06 2.50
64-QAM
3/ 4 2.97 3. 09 3. 75
1/2 2. 63 2.75 3. 33
QPSK
3/ 4 ... required symmetrical or asymmetrical transmission capacity, and whether they
Multi- Carrier and Spread Spectrum Systems K. Fazel and S. Kaiser
...
Multi carrier and spread spectrum systems phần 10 pdf
... Multi- Carrier
MC-CDMA Multi- Carrier CDMA
MC-DS-CDMA Multi- Carrier DS-CDMA
MCM Multi- Carrier Modulation
MC-SS Multi- Carrier Spread Spectrum
MC-TDMA Multi- Carrier TDMA (OFDM and TDMA)
MD Multiuser Detection
MF ... 33 34
Frequency hopping OFDMA 99
Frequency synchronization 136 – 139
Coarse frequency synchronization
136 – 138
CAZAC/M sequence 137
Schmidl and...