Wireless Communications over MIMO Channels phần 3 ppt

... 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

... a set of MSCs. 33 To see the state of each process in the MSC, type trace state in the Simulator command line. 56 Validation of Communications Systems with SDL Then you can simulate the SDL model ... specified in Section 3. 2 .3. A. Prepare the Simulator as indicated in Section 4 .3. 2.1. B. Execute the 4 start transitions if not already done. 60 Validation of Comm...

Ngày tải lên: 07/08/2014, 21:20

... detailed overview of video compression technologies the reader is referred to Symes (20 03) . 3. 2 ARTIFACTS 3. 2.1 Compression Artifacts As pointed out in section 3. 1.4, the compression algorithms used ... and extent of the pattern (see Figure 3. 3(b)). Recent codecs such as H.264 employ a deblocking filter to reduce the visibility of this artifact. Figure 3. 3 Illustration of typical...

Ngày tải lên: 09/08/2014, 19:21

... plan to say to them over they phone. If you don’t, PAGE 43 1 137 5$ $CH3 06-02-05 12:00:59 PS 48 Selling to Anyone Over the Phone The Kind Customer The keywords used to describe this type of customer ... but the payoff means more dollars for you. PAGE 40 1 137 5$ $CH3 06-02-05 12:00:56 PS 3 CHAPTER Identifying Personality Types Over the Phone PAGE 37...

Ngày tải lên: 10/08/2014, 07:21

... RTP packet.  G7 23: G7 23 is specified in ITU Recommendation G.7 23. 1, ‘Dual-rate speech coder for multimedia communications transmitting at 5 .3 and 6 .3 kbit/s’. The G.7 23. 1 5 .3/ 6 .3 kbit/s codec was ... PSS; Protocols and codecs (Rel.6.1.0, 09-2004). [34 ] 3GPP TR22. 233 : Technical Specification Group Services and System Aspects; Transparent end-to-end PSS; Stage 1 (Rel...

Ngày tải lên: 14/08/2014, 12:20

... . 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