Digital Communication Chapter 1

Ngày tải lên: 28/03/2014, 09:20

... đặc biệt để khắc phục ảnh hưởng nhiễu Hai khía cạnh đưa Shannon báo “A Maththemathical Theroy of Communication xuất năm 1948 Bell System Technical Journal - nơi đưa lý thuyết thông tin Shannon ... định lý quan trọng cho kỹ sư truyền thông Tài liệu tham khảo C E Shannon "A Mathematical Theory of Communication. " Bell System Technical Journal, Vol 27, 1948 Tất kỹ sư truyền thông phải đọc...

Ngày tải lên: 18/09/2012, 10:13

... timing error e = E - Similarly, it follows that E[N(t; E, EI)N(t + u; E, i)] = E[N(t - EIT; E - f, 0) N(t + u - iT; E - i, 0)] = E[N(O; & - i, 0) N(u; E - i, O)] = &(u;& - e> ( 2-3 9) so that also ... secondterm in ( 2-5 7) is well approximatedby +m(k@) J - b(t)) (-& v(t; e,))dtZ f S$,f’(O; e,) ru2 IH@)12 g -0 0 ( 2-6 2) where d2 Sg)(O; e,) = ~WW...

Ngày tải lên: 17/10/2013, 19:15

... Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing Heinrich Meyr, ... transmissionrate of communication? (answer: the channel capacity C) We gain a considerableinsight comparingtheseboundarieswith the performance of any communication system design The communicationmodel ... Benedettoand E Biglieri and V Castellani, Digital Transmission Theory...

Ngày tải lên: 20/10/2013, 10:15

... by Digital Interpolation We claimed earlier that there is no penalty associated with digitally processing a continuous-time band-limited signal Mathematically, the equivalence of analog and digital ... obtained by digital interpolation of the samples (x(kT,)} The frequency response of the digital interpolation filter is x(kT, I2 I < 1/2T, (4-42) Timing recovery can thus be done by di...

Ngày tải lên: 20/10/2013, 10:15

... lowpass process Due to the equivalence of digital and analog signal processing, differentiation can be done in the digital domain The impulse response of the digital differentiator is defined in the ... 5-12 we show a first structure of a digital timing error detector The signal is sampled at a rate l/Td, processed in a digital matched filter followed by a digital interpolator The...

Ngày tải lên: 24/10/2013, 09:15

... - j*(kTs -+ -& -ET) T ,-j(e+kTasz) jr&$ mnT-.cT) T ,j(e+kT,n) k=-Co = (N2’2 E[az an] g n =-( N-1)/2 = (N-1)/2 C n =-( N-l)/2 where i(t) E[ai an] & Jm j*(t-rzT-ET) i(t-raT-ET) dt ( 6-4 6) -CO (-jw) G*(w) ... ?I =-( N-1)/2 n=(N- = (-T) such that the cross g*(t-nT-ET) tj(t-nT-ET) term dt 1)/2 c 7a=(N- & / (jw) lG(w)j2 dw s ta =-( N-l)/2 = (-j) s-CO ( 6-5 5) 1)/2 c E[a,az] F &...

Ngày tải lên: 24/10/2013, 09:15

... :: -\ \‘ m /=J B B CRB 4-QAM 16-QAM N 2-> infinity 100 ., .- w _ _ _ _ _ -. _ .- - o-2 -? : q I 1 0-4 1"" I 0 , I 2b lb Es/No I I 3b [dB] Figure 6-5 Linearized Tracking Performance of NDA-ML ... Cramer-Rao bound (CRB) Figure 6-l Linearized Tracking Performance of DD-ML Carrier Synchronizer for QPSK 360 Performance Analysis of Synchronizers 0.8 [ - - - - Es/N...

Ngày tải lên: 28/10/2013, 16:15

... Bibliography [l] W C Lindsey and M K Simon, Telecommunication Systems Engineering Englewood Cliffs, NJ: Prentice-Hall, 1973 [2] J G Proakis, Digital Communications New York: McGraw-Hill, 2nd ed., ... Figure 7-12 it follows that the latter effect dominates 7.7 Coded Transmission Today most practical communication systems employ some form of coding This raises the question of how random car...

Ngày tải lên: 28/10/2013, 16:15

... frequencyadjusted samples of (ICT,) e-JSlkT* are fed to a digital lowpass filter Note that the decimation rate T,, /Y& and the bandwidth of the digital lowpass filter have to be properly selected according ... with Application to Burst Digital Transmission,” IEEE Trans Info Theory, pp 543-551, July 1983 F Classen, H Meyr and P Sehier, “An All Feedforward Synchronization Unit for Digita...

Ngày tải lên: 07/11/2013, 10:15

... mathematical sense) and decimator control; see also [9, lo] Digital receivers capable of operating at variable data rates are of interest in digital broadcasting systems [ 111 They require an interactive ... “Interpolation in Digital Modems - Part II: Implementation and Performance,” ZEEE Trans Commun., vol COM-41, pp 998-1008, June 1993 European Telecommunications Institute, Digital...

Ngày tải lên: 07/11/2013, 10:15

... of acceptable accuracy For this reason, quantization effects in digital receivers are distinctly different than in other areas of digital signal processing (such as audio signal processing), which ... hardware complexity as well 10.9.5 Punctured Codes Current telecommunication standards, e.g., digital video broadcasting (DVB [28]) or digital audio broadcasting (DAB [29]) usually sup...

Ngày tải lên: 07/11/2013, 10:15

... Plenary, Chicago, IL, June 18, 1992 [3] J Cr Proakis, Digital Communications New York: McGraw-Hill, 1989 [4] H Meyr, “Signal Processing in Digital Receivers: Model, Algorithm, Architecture,” in Proc ... short time frame 11.2 Digital Transmission over Continuous-Time and Discrete-Equivalent Fading Channels 11.2.1 Transmission over Continuous-Time Fading Channels In digital communicati...

Ngày tải lên: 14/12/2013, 14:15

... (12-27) and (12-37) [ML] and (12-31) and (12-43) [MAP] can serve as the basis for deriving simplified receivers that can actually be implemented MAP Dynamic Sync Parameter Estimation via ML Estimation ... (Boston, MA), pp 235-239, Oct 1992 El R Raheli, A Polydoros, and C K Tzou, “Per-Survivor Processing,” Digital Signal Processing, vol 3, pp 175-187, July 1993 [7] R Raheli, A Polydoros, a...

Ngày tải lên: 14/12/2013, 14:15

... Ys;k through a systemsof equations[eqs (13-32) and (13-34)] 13.4 Spread Spectrum Communication In digital radio communications, spread-se&rum techniques, particular, (SS) in code division multiple ... A J Viterbi, “Wireless Digital Communication: A View Based on Three Lessons Learned,” IEEE Communic Mugaz., pp 33-36, Sept 1991 [2] H Meyr and R Subramanian, “Advanced Digital Receiver...

Ngày tải lên: 14/12/2013, 14:15