Tài liệu Modulation and coding course- lecture 4 pdf

... 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  Matc...

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 ... time tr. and equal energy per tr. data bit for binary-PAM and 4- ary PAM: • 4- ary: T=2Tb and Binay: T=Tb • 4- ary PAM (rectangular pulse) Binary PAM (rectangular pulse)...

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 ∫ ∪∪ = 43 2 )|()( 11 ZZZ e dmpmP ... the signal space: Lecture 5 19 Example of upper bound on av. Symbol error prob. based on union bound )( 1 t ψ )( 2 t ψ 1 s 3 s 2 s 4 s 2,1 d 4, 3 d 3,2 d...

Ngày tải lên: 27/01/2014, 08:20

... ,,( i mmm=m 44 344 21 44 4 344 421 bits) coded ( rdBranch wo 1 sequence Codeword 321 , ), ,,,( n nijiii i , ,u, ,uuU UUUU = = = G(m)U , ) ˆ , , ˆ , ˆ ( ˆ 21 i mmm=m { 44 344 21 44 4 344 421 dBranch worper ... Knk nkR c /= Lecture 10 6 Block diagram of the DCS Information source Rate 1/n Conv. encoder Modulator Information sink Rate 1/n Conv. decoder Demodulator 44 344 21 sequence...

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

... encoder Modulator Information sink Rate 1/n Conv. decoder Demodulator 44 344 21 sequenceInput 21 , ), ,,( i mmm=m 44 344 21 44 4 344 421 bits) coded ( rdBranch wo 1 sequence Codeword 321 , ), ,,,( n nijiii i , ... Lecture 12 4 Block diagram of the DCS { 44 344 21 44 4 344 421 dBranch worper outputs 1 dBranch worfor outputsr Demodulato sequence ... 8.53.55.62.6103.11 1.56 ....

Ngày tải lên: 29/10/2013, 13:15

... encoder Modulator Information sink Rate 1/n Conv. decoder Demodulator 44 344 21 sequenceInput 21 , ), ,,( i mmm=m 44 344 21 44 4 344 421 bits) coded ( rdBranch wo 1 sequence Codeword 321 , ), ,,,( n nijiii i , ... , ˆ , ˆ ( ˆ 21 i mmm=m { 44 344 21 44 4 344 421 dBranch worper outputs 1 dBranch worfor outputsr Demodulato sequence received 321 , ), ,,,( n nijii i i i , ,z, ,zzZ...

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 c...

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 ... density and bandwidth efficiency)  Bit synchronization capability  Error detection capability  Interference and noise immunity  Implementation cost and comp...

Ngày tải lên: 23/03/2014, 10:21