Tài liệu Modulation and coding course- lecture 3 pptx

... 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 ... pulse) ‘11’ 22 10BA = Lecture 3 6 Example of M-ary PAM … 0 Tb 2Tb 3Tb 4Tb 5Tb 6Tb 0 Ts 2Ts 0 T 2T 3T 2.2762 V 1 .36 57 V 1 1 0 1 0 1 0 T 2T 3T 4T 5T 6T Rb=1/Tb =3/ Ts R=1/...

Ngày tải lên: 27/01/2014, 08:20

... conversion Vector to waveform conversion Lecture 4 17 Example of projecting signals to an orthonormal signal space ),()()()( ),()()()( ),()()()( 32 3 132 32 131 3 222122221212 121112121111 aatatats aatatats aatatats =⇔+= =⇔+= = ⇔ + = s s s ψψ ψψ ψ ψ )( 1 t ψ )( 2 t ψ ),( 12111 aa = s ),( 22212 aa = s ),( 32 3 13 aa=s Transmitted ... A 0 1 s 2 s T A T A− 0 0 Tt )( 1 t ψ T 1 0 0)()()()( )...

Ngày tải lên: 27/01/2014, 08:20

... ss Lecture 5 17 Union bound: Example of union bound 1 ψ 1 s 4 s 2 s 3 s 1 Z 4 Z 3 Z 2 Z r 2 ψ 1 ψ 1 s 4 s 2 s 3 s 2 A r 1 ψ 1 s 4 s 2 s 3 s 3 A r 1 ψ 1 s 4 s 2 s 3 s 4 A r 2 ψ 2 ψ 2 ψ ∫ ∪∪ = 432 )|()( 11 ZZZ e dmpmP ... 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 Lectu...

Ngày tải lên: 27/01/2014, 08:20

... 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 ... )()()( 21 XXXXX gmgmU = Lecture 10 14 Encoder representation –cont’d In more details: 1110001011 )1,1()0,1()0,0()0,1()1,1()( .0.0.01)()( .01)()( 1)1)(1()()( 1)1)(1()(...

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 -...

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 ... 14 /3 2 8 /3 10 /3 13/ 33 1 /3 5 /35 /3 ( ) ii ttS ),(Γ...

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 metric 1 /3 -4 /3 5 /3 5 /3 -5 /3...

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 ... Digital Communication I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 1 Lecture 1 10 Today, we are going to talk about:  What are ... oscillator...

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

... Communications I: Modulation and Coding Course Term 3 – 2008 Catharina Logothetis Lecture 2 Lecture 2 20 Spectra of PCM waveforms Lecture 2 21 M-ary pulse modulation  M-ary pulse modulations category:  M-ary ... systems  Some basic concepts and definitions such as as signal classification, spectral density, random process, linear systems and signal bandwidth. Lectu...

Ngày tải lên: 23/03/2014, 10:21