Communication Systems Engineering Episode 3 Part 5 ppt
Communication Systems Engineering Episode 1 Part 5 ppt
... 0.1} a 1 0 .3 a 2 0. 25 a 3 0. 25 a 4 0.1 a 5 0.1 0 .3 0. 25 0. 25 0.2 0 .3 0. 25 0. 45 + + + 0 .55 0. 45 + 1.0 1 0 0 1 0 1 0 1 Letter Codeword a 1 11 a 2 10 a 3 01 a 4 001 a 5 000 n bits symbol HX ... {2,2,2 ,3, 3}, (verify that Kraft inequality holds!) n 1 n 2 n 3 n 4 n 5 Eytan Modiano Slide 11 Huffman code example A = {a 1 ,a 2 ,a 3 , a 4 , a 5 } an...
Ngày tải lên: 07/08/2014, 12:21
Communication Systems Engineering Episode 1 Part 9 pptx
... = n i PP in n e i e ni − = − ∑ / () 2 1 Eytan Modiano Slide 1 16 .36 : Communication Systems Engineering Lectures 12/ 13: Channel Capacity and Coding Eytan Modiano Eytan Modiano Slide 15 The Generator Matrix • For input sequence ... correcting single errors – n = 2 m - 1, k = 2 m -1 -m (e.g., (3, 1), (7,4), ( 15, 11)…) – R = 1 - m/(2 m - 1) => very high rate – d m...
Ngày tải lên: 07/08/2014, 12:21
Communication Systems Engineering Episode 2 Part 1 pptx
... FEEDBACK ERRORS FOR GO BACK 4 ARQ 50 3 4 t 1 SN RN 0 4 5 x 4 5 6 x 5 Window (0 ,3) (2 ,5) (4,7) (5, 8) Node A Node B 2 3 2 2 1 Packets 0 1 2 3 4 delivered • When an error ... Example of Go Back 7 ARQ SN 0 3 4 5 t 1 6 RN 0 1 2 3 5 Window (0,6) (1,7) (5, 11)(2,8) (3, 9) Node A Node B 2 0 5 Packets delivered 0 1 2 3 4 5 • Note t...
Ngày tải lên: 07/08/2014, 12:21
Communication Systems Engineering Episode 2 Part 2 pptx
... compute N, the average number of customers in the system Eytan Modiano Slide 1 16 .36 : Communication Systems Engineering Lecture 17/18: Delay Models for Data Networks Eytan Modiano Eytan Modiano Slide ... take 30 seconds to be served. • How much time do they spend in the restaurant? – Service rate = µµ µµ = 60/0 .5= 120 customers per hour – T = 1/µµ µµ −− −− λλ λλ = 1/(120-100) = 1...
Ngày tải lên: 07/08/2014, 12:21
Communication Systems Engineering Episode 2 Part 5 ppsx
... – Suppose link between 3 and 1fails (I.e., d31=infinity) – Node 3 will update D3 = d32 + D2 = 3 – In the next step node 2 will update: D2 = d 23+ D3 = 4 – It will take nearly 100 iterations ... A called arcs (or links or edges) 1 2 3 1 2 3 4 N = {1,2 ,3} N = {1,2 ,3, 4} A = {(1,2),(2 ,3) ,(1,4),(2,4)} A = {(1,2)} Eytan Modiano Slide 5 Bellman Ford - example Eytan...
Ngày tải lên: 07/08/2014, 12:21
