Modulation and coding course- lecture 10

... it.  Example: 1100 1 0101 0 1 1100 1 1101 1 :sequenceOutput 001 :sequenceInput 21 uu Branch word Register contents 1 1100 0101 1 1 1101 11 0000000 1 1101 11 OutputInput m Modulo-2 sum: Lecture 10 13 Encoder ... Digital Communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 10 Lecture 10 10 Effective code rate  Initialize the memory...

Ngày tải lên: 25/10/2013, 06:15

... it.  Example: 1100 1 0101 0 1 1100 1 1101 1 :sequenceOutput 001 :sequenceInput 21 uu Branch word Register contents 1 1100 0101 1 1 1101 11 0000000 1 1101 11 OutputInput m Modulo-2 sum: Lecture 10 13 Encoder ... Communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 10 Lecture 10 20 Trellis – cont’d 1/11 0/00 0 /10 1/11 1/01 0/00 0/...

Ngày tải lên: 30/03/2014, 10:20

... code 0101 1 0100 1 0101 0001 0101 0 0100 000 100 100 0100 00 11 1100 0 0100 0 000 1101 101 1101 1 0101 0 1101 1 0101 001 1100 1100 1100 0100 00 0101 1100 0101 111 1101 01 1101 1000 1100 0 1101 1100 0 010 000 1101 10 0100 1 1100 1 0100 0101 1 1101 1011 1101 0100 0001 000111 1100 1101 1101 1 0100 1101 1100 1101 0 1101 00000000 LL M MMM Coset ... aaababa )( and )( FV ∈+=+⇒∈∀ uvvuvu, )()(,...

Ngày tải lên: 25/10/2013, 06:15

... of the code, denoted by ffree dd or Lecture 12 8 Example of hard-decision Viterbi decoding )100 ( ˆ =m ) 1100 1 1101 1( ˆ =U )101 (=m )1 1100 0101 1(=U )0 1101 1101 1(=Z 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 t 5 t 1 0 2 ... remerging to all-zero path with minimum weight 5= f d Lecture 12 9 Example of soft-decision Viterbi decoding )101 ( ˆ =m )1 1100 0101 1( ˆ =U...

Ngày tải lên: 29/10/2013, 13:15

... Modulation, Demodulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 11 Lecture 11 10 Trellis – cont’d 1/11 0/00 0 /10 1/11 1/01 0/00 0/11 0 /10 0/01 1/11 1/01 1/00 0/00 0/11 0 /10 0/01 0/00 0/11 0/00 6 t 1 t 2 t 3 t 4 t 5 t 1 ... 3 0 1 2 3 2 3 20 2 30 )100 ( ˆ =m )00001 1101 1( ˆ =U Lecture 11 28 Example of soft-decision Viterbi decoding )101 ( ˆ =m )1 11...

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 the ... oscill...

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 ... -3.1867 PCM codeword 110 110 111 110 100 010 011 100 100 011 PCM sequence amplitude x(t) Lecture 2 12 Quantization error  Quantizing error: The difference between the...

Ngày tải lên: 08/11/2013, 18:15

... levels 111 3.1867 110 2.2762 101 1.3657 100 0.4552 011 -0.4552 010 -1.3657 001 -2.2762 000 -3.1867 PCM codeword 110 110 111 110 100 010 011 100 100 011 PCM sequence amplitude x(t) Lecture 3 5 Example ... non-uniform  Baseband modulation  Binary pulse modulation  M-ary pulse modulation  M-PAM (M-ay Pulse amplitude modulation) Lecture 3 3 Formatting and transmissio...

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 Period 3 - 2007 Catharina Logothetis Lecture 5 Lecture 5 20 Eb/No figure of merit in digital communications  ... PAM T t )( 1 t ψ T 1 0 Lecture 5 2 Last time we talked about:  Receiver structure  Impact of AWGN and ISI on the transmitted signal  Optimum filter to maximize SNR ...

Ngày tải lên: 27/01/2014, 08:20