Multi carrier and spread spectrum systems phần 6 docx

... in multi- carrier systems is shown. To 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 ... 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 dB 1...

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... 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 Transmission 25 serial data symbols serial- to- parallel converter sub -carrier f 0 sub -carrier f 1 sub -carrier f N c −1 parallel ... 93. [19] Fazel K. and Fettweis G. (eds), Multi- Carrier Spread- Spectrum. Boston: Kluwer Academic Publishers, 1997, Proc...

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... 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 ... infras- tructure, required symmetrical or asymmetrical transmission capacity, and whether they Multi- Carrier and Spread Spectrum Systems K. Fazel and S. Kaiser  2003...

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... spread spectrum communications,” Proceedings of the IEEE, vol. 76, pp. 65 7 67 1, June 1988. [35] Ormondroyd R.F., Lam W.K. and Davies J., “A multi- carrier spread spectrum approach to broadband underwater ... 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...

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... sub-bands to avoid 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 ... orthogonal multi- carrier CDMA in a multipath fading channel,” IEEE Transactions on Communications, vol. 44,...

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... 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 ... 67 9 69 1, April 2000. Multi- Carrier Modulation and Demodulation 121 Total channel bandwidth Guard band DC sub -carrier (not used) Unused sub-carriers i.e.Vi...

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... 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 with both AM/AM and AM/PM non- linear ... E b /N 0 at BER = 10 −9 (23,17)(31,25) 53 bytes 0.5 96 4.5 dB ( 16, 15) (64 ,57) 1 06 bytes 0.834 6. 2 dB ( 56, 49)(32, 26) 159 bytes 0.711 3.8 dB (49,42)(32,31) 159 byte...

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... −84 −79 −77 −72 −71 6 −85 −83 −78 − 76 −72 −70 7 −84 −82 −77 −75 −71 69 10 −83 −81 − 76 −74 69 68 12 −82 −80 −75 −73 69 67 14 −81 −79 −74 −72 68 66 20 −80 −78 −73 −71 66 65 214 Applications Frame ... symbol BPSK 1/2 1 48 24 BPSK 3/4 1 48 36 QPSK 1/2 2 96 48 QPSK 3/4 2 96 72 16- QAM 1/2 4 192 96 16- QAM 3/4 4 192 144 64 -QAM 2/3 6 288 192 64 -QAM 3/4 6 288 2 16 Tabl e 5 -6...

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... Broadband System MC 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 ... constellation 167 – 169 M&Q-Modification 74 Multiband radio 258 Multi- carrier CDMA (MC-CDMA) 8–10, 41–44, 49–83 Multi- carrier channel modeling 21–22 Mul...

Ngày tải lên: 09/08/2014, 19:22