Theory and applications of microeconomics

... Polytechnic Institute and State University Blacksburg, Virginia Multi-Carrier Digital Communications: Theory and Applications of OFDM Ahmad R S Bahai and Burton R Saltzberg Principles of Digital Transmission: ... Digital Communications Theory and Applications of OFDM Chapter 1.1 Introduction to Digital Communications Background The physical layer of...

Ngày tải lên: 02/03/2013, 16:58

... Digital Communications Theory and Applications of OFDM Chapter 1.1 Introduction to Digital Communications Background The physical layer of digital communications includes mapping of digital input ... Polytechnic Institute and State University Blacksburg, Virginia Multi-Carrier Digital Communications: Theory and Applications of OFDM Ahmad R S Bahai...

Ngày tải lên: 27/06/2014, 15:20

... 97 10 0 10 3 10 5 11 4 11 4 12 1 12 4 12 5 12 8 13 1 13 1 13 3 13 5 14 0 14 2 14 3 OFDM 4 .1 General Principles 4 .1. 1 The concept of multicarrier transmission 4 .1. 2 OFDM ... Theory and Applications of OFDM and CDMA Theory and Applications of OFDM and CDMA Wideband Wireless Communications Henrik Schulze and Christian Luders ¨ Both...

Ngày tải lên: 09/08/2014, 19:22

... t = t1 − t2 for t1 to obtain ∞ −∞ = ∞ df2 ∞ −∞ −∞ ∞ dt2 −∞ df2 ej 2 f2 (τ1 − 2 ) ∞ df ∞ −∞ −∞ dt ej 2 (f +f2 )τ1 e−j 2 ν1 (t+t2 ) e−j 2 f2 2 ej 2 2 t2 R(f, t) dt2 e−j 2 (ν1 − 2 )t2 ∞ −∞ ∞ df ... (2. 19) and (2. 18) Proof From Equations (2. 20) and (2. 18), we conclude that the left-hand side equals the fourfold integral ∞ −∞ = df1 dt1 df2 dt2 ej 2 f1 τ1 e−j 2 ν1 t1 e−j 2 f2 2...

Ngày tải lên: 09/08/2014, 19:22

... codes, it is often convenient to work with code words of finite length, but it is not necessary, and the length is not determined by the code Theory and Applications of OFDM and CDMA  2005 John ... Lc + Le and interpret the MAP as a SISO receiver that has soft LLR vectors as input and output as depicted in Figure 3. 3 The input vectors of the SISO are La and Lc , wh...

Ngày tải lên: 09/08/2014, 19:22

... channel and parallelize the given data stream in an appropriate way Theory and Applications of OFDM and CDMA  2005 John Wiley & Sons, Ltd Henrik Schulze and Christian L¨ ders u 146 OFDM Frequency ... to be called OFDM (orthogonal frequency division 1.2 0.8 0.6 0 .4 0.2 –0.2 –0 .4 10 11 12 13 14 15 fT 16 17 18 19 Figure 4. 5 Orthogonal overlapping spectral shapes for...

Ngày tải lên: 09/08/2014, 19:22

... signal power Ps,av With K → ∞, the amplitude of an OFDM signal is OFDM 167 I(t ) –2 0 .5 1 .5 t / TS 2 .5 3 .5 0 .5 1 .5 t / TS 2 .5 3 .5 0 .5 1 .5 t / TS 2 .5 3 .5 (a) Q(t ) –2 (b) Amplitude 0 (c) Figure 4.20 ... occur for every subcarrier and for every pair of subcarriers These mixing products 170 OFDM Amplitude 0 0 .5 1 .5 t/TS 2 .5 3 .5 0 .5 1 .5 t/TS 2 .5 3...

Ngày tải lên: 09/08/2014, 19:22

... 10 K = 15 36, L = 80 10 SNR [dB] 15 20 Figure 4 .67 Simulation of a wideband OFDM system with 16- QAM for a moderately fast and frequency nonselective channel OFDM 231 OFDM with 16- QAM and Rc = ... −4 10 K = 15 36, L = 80 10 SNR [dB] 15 20 Figure 4.72 Simulation of a wideband OFDM system with 64 -QAM for a very fast and frequency-selective channel 234 OFDM OFDM with...

Ngày tải lên: 09/08/2014, 19:22

... sequence of pseudorandom signs These sequences are called pseudonoise (PN) sequences or code signals We Theory and Applications of OFDM and CDMA  2005 John Wiley & Sons, Ltd Henrik Schulze and Christian ... definition of wideband is the same as that introduced in Chapter for OFDM Furthermore, it should not be confused with one transmission mode of UMTS, which is also...

Ngày tải lên: 09/08/2014, 19:22

... number of base stations involved in a soft handover should be kept small To illustrate this soft handover effort, Figure 5.23 shows the fraction of connections involved in a soft (or softer) handover ... 10 p(S ≤ X ) DL UL −1 10 no SHO DL 8 0 no SHO UL −6 −4 −2 X [dB] Figure 5.22 Illustration of the microdiversity gain by soft handover 2 98 CDMA • A soft handover between two base st...

Ngày tải lên: 09/08/2014, 19:22

... in Subsection 4.6.3 – use OFDM to handle data rates of up to 54 Mbit/s More details on the IEEE 802.11 standard can be found, for example, in (O’Hara and Petrick 199 9) CDMA 355 dk = 00 dk = 01 ... This channel model applies to synchronous wideband MC -CDMA and asynchronous wideband DS -CDMA as well However, the interpretation of matrix H is different and both cases have t...

Ngày tải lên: 09/08/2014, 19:22

... 176 406 Nyquist base, criterion, 10 pulse, OFDM, 1, 145 OFDM and nonlinearities, 166 symbol, 159 OFDM with convolutional coding, 208, 213 OFDM with QAM, 213 OFDM with QPSK, 208 Omni cell, 270 ... Publishers, New York Theory and Applications of OFDM and CDMA  2005 John Wiley & Sons, Ltd Henrik Schulze and Christian L¨ ders u 398 BIBLIOGRAPHY Berrou C, Glavieux A...

Ngày tải lên: 09/08/2014, 19:22

... i.e the incorrectly matched points usually due to errors in feature detection and/ or in matching Finally the evolution of the 2 Stereo Vision Advances in Theory and Applications of Stereo Vision ... The robustness 10 10 Stereo Vision Advances in Theory and Applications of Stereo Vision Fig Performance as a function of noise against the prese...

Ngày tải lên: 10/08/2014, 21:22