The Art of Error Correcting Coding phần 7 ppt

... conditions are stationary, cf. Insert 7. 5. In that case the sources may be calculated from the balance of in- and effluxes of entropy and energy, and it turns out that the scattering of radiation ... proceeded anyway to calculate the potential energy of a gas sphere with radius R and mass M r , cf. Insert 7. 6: 220 7 Radiation Thermodynamics On the...

Ngày tải lên: 23/07/2014, 16:21

... recycled paper Qt 4 Qt 4 THE ART OF BUILDING Qt APPLICATIONS DANIEL MOLKENTIN THE BOOK of THE BOOK of Qt 4 THE BOOK of THE BOOK of Qt 4 đ MOLKENTIN 1 Basics,Tools, and First Code Several Qt classeshaveQObject ... 2 51 8 .11 .1Items 2 51 8 .11 . 2The List View 2 51 8 .11 . 3The Tree View 252 8 .11 . 4The Table View 253 8 .11 .5Clon...

Ngày tải lên: 13/08/2014, 08:21

... usingthe Designer,which allowsthe basicgraphical frameworkofmostapplications to be puttogether “bymouseclick” in Qt versions 4. 1and later .The basisofthisisthe QMainWindowQt class. 4. 1The Anatomy of ... key. Alternatively,while in thenormaldesignmode,you can setthe name of thede- siredBuddywidgetinthe PropertyEditor, usingthe Buddyproperty. 3 Using this ap- proach,wewould setthe...

Ngày tải lên: 13/08/2014, 08:21

... query.Thisisfollowed bythelistofstrings to be displayed.Then comesthe indexof thelistele ment that thedrop-downwidgetdisplaysatthe be- ginning .The next-to-lastparameter specifies whether theusercan add ... Extensions andisdescribedinRFCs2 0 45 , 2 046 , and2 047 . 1 94 6 .5 Ready-made DialogsinQt 6 .5. 4Input Dialogs Forsimplequeries,Qtprovides various template inputdialogs,consistingofasu...

Ngày tải lên: 13/08/2014, 08:21

... nowconnect theclicked()signalofthe Screenshot!buttontothe slot that prepares thescreenshot,and thesignalofthe Printbuttontothe slot that enables theconfiguration of theprintingparameters. Then wecallgrabDesktop(), ... determine the diameter via pieRect(). So that the gradient later “creases” the edge of the pie chart circle, thus creating the impression of spatial depth, we pla...

Ngày tải lên: 13/08/2014, 08:21

... standard array of the binary linear (4, 2, 2) code is the following: ¯s 00 01 10 11 00 0000 011 0 10 11 110 1 11 10 00 11 10 0 011 010 1 10 010 0 0 010 11 11 10 01 01 00 01 011 1 10 10 11 00 Decoding with the standard ... =  11 1  and parity-check matrix H =  11 0 10 1  . Accordingly, its standard array is the following: ¯s 01 00 000 11 1 11 10 0 011 10 0...

Ngày tải lên: 14/08/2014, 12:20

... the binary representation of integers, then the value of the syndrome directly gives the position of the error. This is the idea in the algorithms for encoding and decoding presented below. The ... EG(m, 2) . The columns of the matrix ( ¯x  1 ¯x  2 ¯x  m )  are taken as the coordinates of points of the geometry EG(m ,2) . Then, there is a one-to-one...

Ngày tải lên: 14/08/2014, 12:20

... 1. (3. 17) ã Find the coefcients of the error- locator polynomial (x). ã Find the inverses of the roots of σ(x), that is, the locations of the errors, j 1 , , j . ã Find the values of the errors ... knowledge of the WDS of a code C, the error performance can be estimated, as discussed in Chapter 1. The WDS and the union bound (1 .36 ) give good estim...

Ngày tải lên: 14/08/2014, 12:20

... (4. 23) where P s denotes the probability of a symbol error at the input of the RS decoder, P S = 1 − (1 − p) m , and p denotes the probability of a bit error at the input of the RS decoder. The ... vectors of length 3, code C becomes a binary (21, 9, 5) code that is capable of correcting up to 2 random errors, as well as any single burst of up to 4 bits....

Ngày tải lên: 14/08/2014, 12:20

... received (one error in the second position). The operation of the VD is illustrated in Figures 5. 12 to 5. 17. The evolution of the metric values with respect to the decoding stages is shown in the following ... with Example 5. 5.1, using the traceback technique, at the end of the i = 6 received pair of bits from the channel, the traceback memory would hav...

Ngày tải lên: 14/08/2014, 12:20

... that the syndrome of a binary SPC (n, n − 1, 2) code is simply the sum of the n bits. The second row and the first column will have nonzero syndromes, indicating the presence of an odd number of errors. ... Dd) code. The purpose of the interleaver between the outer and the inner code is twofold. First, it serves to convert the bytes of size k into vectors of...

Ngày tải lên: 14/08/2014, 12:20

... e −|δ 1 −δ 2 |  , (7. 30) SOFT-DECISION DECODING 165 where ¯e(j) is the set of all length-K vectors of Hamming weight one. The vector ¯e(j) is the coset representative of the partition of code C 1 (equivalent ... =+0.2 − 1. 57 =−1. 37   (u 4 ) =  c 4 +  e 1 (u 4 ) =+0.3 + 0. 87 =+1. 17 SOFT-DECISION DECODING 159 The operation of a SOVA decoder can be divided into...

Ngày tải lên: 14/08/2014, 12:20

... has the advantage that the number of bits per symbol is increased by a factor of ν, thus increasing the spectral efficiency of the system. On the other hand, the required average energy of the ... iterative BF decoding on the basis of the extended matrix H ext . Analyze the performance on the basis of the structure of the Tanner graph, by considering sin...

Ngày tải lên: 14/08/2014, 12:20

... 2000) P (NS) b1 ≤ n  w=d 1 w n A (1) w 2 −w w  i=0  w i  Q   2RE b N 0 d 2 P (i)  , (9. 9) where d 2 P (i) = 1 w [ i 1 + (w − i) 2 ] 2 . The probability of a bit error in the second decoding stage upper is also bound by (9. 9) using the same arguments above. The bound (9. 9) ... (correlations) from the subsets selected at the second partitioning stage – given the de...

Ngày tải lên: 14/08/2014, 12:20

... 1990. E. L. Blokh and V. V. Zyablov, Coding of Generalized Concatenated Codes,” Probl. Pered. Inform., vol. 10, no. 1, pp. 45–50, 1974. The Art of Error Correcting Coding, Second Edition Robert H. ... ed., Key Papers in the Development of Coding Theory, pp. 109 –120, IEEE Press, 1974. W. W. Peterson and E. J. Weldon, Jr., Error Correcting Codes, 2nd ed., MIT Press, 1...

Ngày tải lên: 14/08/2014, 12:20