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any1 has solutions to gallager book (lecture notes) principles of digital communications-I . Please send a link or post it. the url for the course :
For a regular galleger LDPC the parity check matrix such as N = 20, K = 5 and number of 1's in the column, H is design as follows: [1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 wit
Some useful references on LDPC R. G. gallager. Low-Density Parity-Check Codes. Cambridge, Massachusetts: M.I.T Press, 1963 Mackay. Good Error-Correcting Codes Based on Very Sparse Matrices. IEEE Transaction on Information Theory, Vol. IT-45, March 1999: 399~431 M. G. Luby, M. Mitzenmacher, M. A. Shokrollahi, D. A. Spielman.
As the magic behind LDPC is Check matrix structure and first was invented by gallager,but I dont know what is the magic behind the generating of such a check matrix. Could any please brief me about generation of check matrix for gallagers LDPC codes any useful resource for it ?
that is suitable for the first data network course for electrical engineering students (4th year). Is gallager's Data Network an appropriate choice?
1) In his book, gallager mentions in section 5.5, page 131, last paragraph: each code in the ensemble has its own probability of decoding error, assuming maximum likelihood decoding for the code. we shall upper bound the expectation over the ensemble of this error probability. Since at least on code in the ensemble is must have an error probabil
Hi, What are the basic knowledge (i.e. calculus, queueing theory) should I have in order to understand the following paper : Abhay K. Parekh and Robert G. gallager, A Generalized Processor Sharing Approach to Flow Control in Integrated Services Networks: The Single Node Case" by Alan Demers, Srinivasan Keshav, Scott Shenker. Analysis and
Anyone has the solution manual to this classic book by gallager? TX
I guess what you're looking for is: Hahne, E., gallager, R., "Round Robin Scheduling for Fair Flow Control in Data Communications Networks" It was his PhD thesis at MIT and was published in the Proceedings of the IEEE International Conference on Communications, pp. 103-107, June 1986 You'll need some that access to the IEEE o