Tài liệu Modulation and coding course- lecture 5 doc

... iEE sii s s ski Ed ki Ed 2 2 min , = ≠ = Digital Communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 5 Lecture 5 20 Eb/No figure of merit in digital communications  ... symbol. b bb R W N S WN ST N E == / 0 b R W : Bit rate : Bandwidth Lecture 5 21 Example of Symbol error prob. For PAM signals )( 1 t ψ 0 1 s 2 s b E b E− Binary PAM...

Ngày tải lên: 27/01/2014, 08:20

... non-uniform  Baseband modulation  Binary pulse modulation  M-ary pulse modulation  M-PAM (M-ay Pulse amplitude modulation) Lecture 3 3 Formatting and transmission of baseband signal  Information ... 3.1867 110 2.2762 101 1.3 657 100 0. 455 2 011 -0. 455 2 010 -1.3 657 001 -2.2762 000 -3.1867 PCM codeword 110 110 111 110 100 010 011 100 100 011 PCM sequence amplitude x(t) Le...

Ngày tải lên: 27/01/2014, 08:20

... A 0 1 s 2 s T A T A− 0 0 Tt )( 1 t ψ T 1 0 0)()()()( )()()(),( /)(/)()( )( 122 0 1212 1111 0 2 2 11 =−−= −=>=< == == ∫ ∫ tAtstd Adtttstts AtsEtst AdttsE T T ψ ψψ ψ 1 2 Digital Communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 4 Lecture 4 20 Implementation of matched filter receiver )(tr 1 z )( 1 tT ... filter to maximize SNR  Matched...

Ngày tải lên: 27/01/2014, 08:20

... iEE sii s s ski Ed ki Ed 2 2 min , = ≠ = Digital Communications I: Modulation and Coding Course Term 3 - 2008 Catharina Logothetis Lecture 5 Lecture 5 20 Eb/No figure of merit in digital communications  SNR ... symbol. b bb R W N S WN ST N E == / 0 b R W : Bit rate : Bandwidth Lecture 5 21 Example of Symbol error prob. For PAM signals )( 1 t ψ 0 1 s 2 s b E b E− Binary PA...

Ngày tải lên: 23/03/2014, 10:21

... Digital Communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 10 Lecture 10 10 Effective code rate  Initialize the memory before encoding the first bit (all- zero)  Clear ... code 0/11 0/10 0/01 1/11 1/01 1/00 0/00 0/11 0/10 0/01 1/11 1/01 1/00 0/00 0/11 0/10 0/01 1/11 1/01 1/00 0/00 0/11 0/10 0/01 1/11 1/01 1/00 0/00 0/11 0/10 0/01 1/11 1/01...

Ngày tải lên: 25/10/2013, 06:15

... error detection and correction codes Lecture 9 7 Why using error correction coding?  Error performance vs. bandwidth  Power vs. bandwidth  Data rate vs. bandwidth  Capacity vs. bandwidth (dB) ... jnj n tj M pp j n P − += − ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ ≤ ∑ )1( 1 jnj n tj B pp j n j n P − += − ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ ≈ ∑ )1( 1 1 p Digital Communications I: Modulation and Coding Course Period 3 - 2...

Ngày tải lên: 25/10/2013, 06:15

... decoding )101( ˆ =m )1110001011( ˆ =U )101(=m )1110001011(=U )1, 3 2 ,1, 3 2 ,1, 3 2 , 3 2 , 3 2 , 3 2 ,1( − − −− =Z 5/ 3 -5/ 3 4/3 0 0 1/3 1/3 -1/3 -1/3 5/ 3 -5/ 3 1/3 1/3 -1/3 6 t 1 t 2 t 3 t 4 t 5 t -5/ 3 0 -5/ 3 -5/ 3 10/3 1/3 14/3 2 8/3 10/3 13/33 1/3 5/ 35/ 3 ( ) ii ttS ),(Γ Branch metric Partial metric 1/3 -4/3 5/ 3 5/ 3 -5/ 3 Lecture 12 ... )1(1 ),,( 256 246 35 35 ++...

Ngày tải lên: 29/10/2013, 13:15

... decoding )101( ˆ =m )1110001011( ˆ =U )101(=m )1110001011(=U )1, 3 2 ,1, 3 2 ,1, 3 2 , 3 2 , 3 2 , 3 2 ,1( − − −− =Z 5/ 3 -5/ 3 4/3 0 0 1/3 1/3 -1/3 -1/3 5/ 3 -5/ 3 1/3 1/3 -1/3 6 t 1 t 2 t 3 t 4 t 5 t -5/ 3 0 -5/ 3 -5/ 3 10/3 1/3 14/3 2 8/3 10/3 13/33 1/3 5/ 35/ 3 ( ) ii ttS ),(Γ Branch metric Partial ... decoding-cont’d  i=4 0 2 0 1 2 1 0 1 1 0 1 2 2 1 0 2 1 1 1 6 t 1 t 2 t 3 t 4...

Ngày tải lên: 29/10/2013, 13:15

... signal  Baseband versus bandpass:  Bandwidth dilemma:  Bandlimited signals are not realizable!  Realizable signals have infinite bandwidth! Baseband signal Bandpass signal Local oscillator Lecture ... oscillator Lecture 1 25 Bandwidth of signal …  Different definition of bandwidth: a) Half-power bandwidth b) Noise equivalent bandwidth c) Null-to-null bandwidth a) Fractional power...

Ngày tải lên: 08/11/2013, 18:15

... I: Modulation and Coding Course Period 3 – 200/ Catharina Logothetis Lecture 2 Lecture 2 10 Encoding (PCM)  A uniform linear quantizer is called Pulse Code Modulation (PCM).  Pulse code modulation ... concepts and definitions as signal classification, spectral density, random process, linear systems and signal bandwidth. Lecture 2 20 Spectra of PCM waveforms Lecture...

Ngày tải lên: 08/11/2013, 18:15