Multi carrier and spread spectrum systems phần 5 ppsx
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 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 ... spread spectrum communications,” Proceedings of the
IEEE, vol. 76, pp. 657 –671, June 1988.
[ 35] Ormondroyd R.F., Lam W.K. and Davies J., “A multi- carrier s...
Multi carrier and spread spectrum systems phần 7 ppsx
... (VTC’94),
Stockholm, Sweden, pp. 1 655 –1 659 , June 1994.
[8] Choi Y S., Voltz P.J. and Cassara F.A., “On channel estimation and detection for multicarrier sig-
nals in fast and selective Rayleigh fading ... 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 and HPAs wi...
Multi carrier and spread spectrum systems phần 2 docx
... −3 0 −2 .5 0 0
2 0.1 −4 0.2 0 0.3 0 0.1 −1 .5
3 0.2 −8 0 .5 −2 1.0 −3 0.3 −4 .5
4 0.3 −12 1.6 −6 1.6 5 0 .5 −7 .5
5 0.4 −16 2.3 −8 5. 0 −2 15. 0 −8.0
6 0 .5 −20 5. 0 −10 6.6 −4 17.2 −17.7
Multi- Carrier ... 1-8(b).
Spread Spectrum Techniques 31
Table 1-2 Broadcasting standards DAB and DVB-T
Parameter DAB DVB-T
Bandwidth 1 .5 MHz 8MHz
Number of
sub-carriers N
c
192
( 256 F...
Multi carrier and spread spectrum systems phần 4 pdf
... adjacent
Multi- Carrier and Spread Spectrum Systems K. Fazel and S. Kaiser
2003 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 ... Egle J. and Lindner J., “Transformation methods, coding and equalization for time- and
frequency-selective channels,” European...
Multi carrier and spread spectrum systems phần 6 docx
... evaluate and optimize the channel estimation,
a multi- carrier reference scenario typical for mobile radio systems is defined. The fre-
quency band has a bandwidth of B = 2 MHz and is located at a carrier ... 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...
Multi carrier and spread spectrum systems phần 8 ppt
... mobility as
Multi- Carrier and Spread Spectrum Systems K. Fazel and S. Kaiser
2003 John Wiley & Sons, Ltd ISBN: 0-470-84899 -5
206 Applications
5. 3.2 Channel Characteristics
WLAN systems often ... (ETT), vol. 13,
pp. 4 65 474, Sept. 2002.
[62] Pollet T., Moeneclaey M., Jeanclaude I. and Sari H., “Effect of carrier phase jitter on single -carrier and
multi- car...
Multi carrier and spread spectrum systems phần 9 docx
... asymmetrical transmission capacity, and whether they
Multi- Carrier and Spread Spectrum Systems K. Fazel and S. Kaiser
2003 John Wiley & Sons, Ltd ISBN: 0-470-84899 -5
222 Applications
DVB-T
base ... 2. 75 3.33
QPSK
3/4 3. 95 4.12 5. 00
1/2 5. 27 5. 50 6.67
Channel spacing 1 16-QAM
3/4 7.91 8. 25 10.00
1/2 7.91 8. 25 10.00
64-QAM
3/4 11.87 12.38 15. 00
228 Applica...
Multi carrier and spread spectrum systems phần 10 pdf
... 254 – 255
ST block codes (STBC) 238–240
ST trellis codes (STTC) 237–238
UMTS 253
Spatial diversity 233
Spreading codes 52 54
PAPR 54 , 184–1 85
Spreading length 34, 49, 55 , 201
Spread spectrum 30– 45
Spread ... and
demodulation 116–123
Multi- carrier spread spectrum (MC-SS)
8–10, 41–44
Multi- carrier TDMA (MC-TDMA)
1 05 107
Multi- carrier transmission 24–30
Mult...
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