Wireless Communications over MIMO Channels phần 4 pptx

... demonstration and validation of the VDTN architecture, allowing the development, performance evaluation, and validation of new services and protocols, as well as VDTN applications. The proposed testbed ... laboratory testbed for VDTN networks, the VDTN@Lab. This testbed gathered contributions and insights from the above-described projects. The communicat...

Ngày tải lên: 21/06/2014, 17:20

... Mobile Telecommunications System V-BLAST Vertical BLAST WSSUS Wide Sense Stationary Uncorrelated Scattering WLAN Wireless Local Area Network ZF Zero Forcing 4 INTRODUCTION TO DIGITAL COMMUNICATIONS Figure ... independent, identically dis- tributed (i.i.d.) symbols x[k] is transmitted over a SISO channel as discussed in the last section. Moreover, we are restricted to an uncoded transmiss...

Ngày tải lên: 27/06/2014, 08:20

... Links Forward and reverse traffic channels operate at avariablebit rate: full rate,half rate, one-fourth rate, and one-eighth rate. These rates are 9.6, 4. 8, 2 .4, and 1.2 kbit/s for RateSet 1, and 14. 4,7.2, ... corresponds to a 64- ary orthogonal modulation. For the traffic channels, vocoders at variable data rates of 9.6, 4. 8, 2 .4, and 1.2 kbit/s for Rate Set 1 and 14. 4, 7....

Ngày tải lên: 14/08/2014, 06:22

... . 17 4 4 .1. 2 Direct-SequenceCDMA 18 1 4 .1. 3 Single-User Matched Filter (SUMF) . . . . . . . . . . . . . . . . . 18 5 4 .1. 4 SpreadingCodes 19 1 4.2 OFDM-CDMA 19 4 4.2 .1 MulticarrierTransmission 19 4 4.2.2 ... limited to the physical transmission Wireless Communications over MIMO Channels Vo l k e r K ă uhn 2006 John Wiley & Sons, Ltd Wireless Communications o...

Ngày tải lên: 14/08/2014, 12:20

... a nondissipative channel with σ 2 H = 1 E H  Pr{Y D à, | h} = 1 /2 0 sin 2 () sin 2 () + ( à, /2) 2 E s /N 0 d = 1 2 1 ( à, /2) 2 E s /N 0 1 + ( à, /2) 2 E s /N 0 . (1.57) Contrary to ... whole magnitude |H|= √ H 2 + H  2 is Rayleigh distributed p |H| (ξ) =  2 /σ 2 H · exp(−ξ 2 /σ 2 H )ξ≥ 0 0else (1 .26 ) with mean E H {|h|} =  πσ 2 H /2. In (1 .26...

Ngày tải lên: 14/08/2014, 12:20

... 0.01 b) P out = 0.1 Figure 2. 13 Outage probability of flat Rayleigh fading channels for Gaussian input 2 .3 Channel Capacity of MIMO Systems As explained earlier, MIMO systems can be found in a ... and (2 .33 ) can be rewritten as P w (x) =  x  ∈\{x  } Pr  Y ∈ D(x  ) | x  =  x  ∈\{x  }  y∈D(x  ) Pr{y | x}. (2 .34 ) The right-hand side of (2 .34 ) replaces y /∈ D(x) by the...

Ngày tải lên: 14/08/2014, 12:20

... by different means. The distance properties of codes are examined and used for Wireless Communications over MIMO Channels Vo l k e r K ă uhn 2006 John Wiley & Sons, Ltd 92 FORWARD ERROR ... −2b) √ E s /T s  2 σ 2 N  (3.39) into (3.38) results in L(r | b) = 4| h| √ E s /T s σ 2 N r = 4| h| 2 E s N 0    L ch ˜r with ˜r = r |h| √ E s /T s . (3 .40 ) In (3 .40 ), ˜r is a n...

Ngày tải lên: 14/08/2014, 12:20

... (3.114) 134 FORWARD ERROR CORRECTION CODING 0 0 .5 1 1 .5 2 0 0.2 0.4 0.6 0.8 1 0 0 .5 1 1 .5 2 0 0.2 0.4 0.6 0.8 1 L c = 3L c = 3 L c = 5L c = 5 L c = 7L c = 7 uncodeduncoded C/R c →C/R c → IPC ... 2 3 4 5 6 10 −4 10 −3 10 −2 10 −1 10 0 10 5 10 5 E b /N 0 in dB → BER → Max-Log-MAP, it. 1 Log-MAP, it. 1 Max-Log-MAP, it. 2 Log-MAP, it. 2 Max-Log-MAP, it. 6 Log-MAP, it. 6 Figure 3....

Ngày tải lên: 14/08/2014, 12:20

... presents some information on the theoretical results of CDMA systems. Wireless Communications over MIMO Channels Vo l k e r K ă uhn 20 06 John Wiley & Sons, Ltd CODE DIVISION MULTIPLE ACCESS 201 OFDM transmitter OFDM receiver despreading spreading S/P P/S channel Figure ... 1]. (4.9) 166 FORWARD ERROR CORRECTION CODING r 1 r 2 r 3 r 4 r 5 r 6 s 1 s 2 s 3 P V Figure 3.52 Bi...

Ngày tải lên: 14/08/2014, 12:20

... R rc c d f CCS 2 7 1/2 133 8 , 171 8 1/32 10 CCS 4 7 1/4 1 17 8 , 1 27 8 , 155 8 , 171 8 1/16 20 CCS 8 7 1/8 1 17 8 , 1 27 8 , 155 8 , 171 8 1/8 40 135 8 , 173 8 , 135 8 , 145 8 CSS 7 1/64 (Frenger ... g 2 = 171 8 Walsh, R wh c = 6/64 R rc c = 1/3 SCCC 1 g 1 = 7 8 , g 2 = 5 8 g 1 = 7 8 , g r 2 = 5 8 R rc c = 1/16 SCCC 2 g 1 = 7 8 , g 2 = 5 8 g 1 = 23 8 ,g 2 = 27 8 g r...

Ngày tải lên: 14/08/2014, 12:20

... a 4-path Rayleigh fading channel and E b /N 0 = 8 dB (solid lines: NL 1, dashed lines: NL 2) 0 0.4 0 .8 1.2 1.6 2 10 −3 10 −2 10 −1 10 0 0 0.4 0 .8 1.2 1.6 2 10 −3 10 −2 10 −1 10 0 BER → BER → a) ... D 1/2 m à=0 D 1/2 A R D 1/2 à D 1/2 r. (5. 48) MULTIUSER DETECTION IN CDMA SYSTEMS 255 0 2 4 6 8 10 −5 10 −4 10 −3 10 −2 10 −1 10 0 0 2 4 6 8 10 −5 10 −4 10 −3 10 −2 10 −1 10 0 E b...

Ngày tải lên: 14/08/2014, 12:20

... al. ( 199 7), Tarokh et al. ( 199 7, 199 8). Results of a systematic computer-based code search can be found in B ă aro et al. (2000a,b) and some implementation aspects in Naguib et al. ( 199 7, 199 8). Figure ... bit and power-loading strategies have been proposed by Hughes-Hartogs ( 198 9), Fischer and Huber ( 199 6), Krongold et al. ( 199 9, 2000), and Mutti and Dahlhaus (2004). MULTIPLE...

Ngày tải lên: 14/08/2014, 12:20

... MLD has to cope with all layers simultaneously. 0 5 10 15 20 10 −5 10 −4 10 −3 10 −2 10 −1 10 0 0 5 10 15 20 10 −5 10 −4 10 −3 10 −2 10 −1 10 0 E b /N 0 in dB →E b /N 0 in dB → BER → BER → a) ... i ≤ N holds. MULTIPLE ANTENNA SYSTEMS 319 0 5 10 15 20 25 30 10 −5 10 −4 10 −3 10 −2 10 −1 10 0 0 5 10 15 20 25 30 10 −5 10 −4 10 −3 10 −2 10 −1...

Ngày tải lên: 14/08/2014, 12:20

... for maintaining IP addresses, you can get the details necessary to obtain a range. In North America, South America, the Caribbean, and sub-Saharan Africa, the organization responsible is the Address ... optimal path include considerations such as path distance, load, link bandwidth, delay, and reliability. Metrics with such granularity provide a more accu- rate evaluation of available pat...

Ngày tải lên: 14/08/2014, 14:20

... (seconds) All 0 0.1 0.2 0.3 0 .4 0.5 0.6 Resistance figure (a) 25002000150010005000 Time (seconds) All 0 .44 5 0 .44 55 0 .44 6 0 .44 65 0 .44 7 0 .44 75 0 .44 8 0 .44 85 0 .44 9 0 .44 95 0 .45 Resistance figure (b) Figure ... SHI 0 0.1 0.2 0.3 0 .4 0.5 0.6 0.7 Resistance figure (a) 25002000150010005000 Time (seconds) FHI and SHI 0 .44 45 0 .44 5 0 .44 55 0 .44 6 0 .44 65 0 .44 7 0 .44 75 0 ....

Ngày tải lên: 14/08/2014, 19:20