theory of spread spectrum communications a tutorial

Ngày tải lên: 07/09/2013, 13:45

... spectra of the indicates that the real and are imaginary components of are uncorrelated and, hence, independent and have the same variance Since the density of a complex- valued random variable ... otherwise, and Since the real and imaginary components of are jointly Gaussian, this random process is a complex-valued Gaussian random variable. Straightforward calculations using (1-40) and the ... possible paths. At any node, only the partial path reaching that node with the largest partial metric is re- tained, for any partial path stemming from the node will add the same branch metrics to all...

Ngày tải lên: 20/01/2014, 06:20

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Ngày tải lên: 21/06/2014, 19:20

... channels of a certain type. Chapter 3 discusses the basic form that a stochastic local area channel model must take. Great care is taken in defining a local area and a stochastic local area channel, ... illustrates the parallel nature of these operations in baseband and passband. f f f f -f C f C f y: H: x: x: H: y: ~ ~ ~ Baseband Passband 0 0 0 Figure 2.4: Spectral diagram of baseband and passband ... the act of modulating a carrier wave by a band-limited data signal. Thus, modulation converts a baseband signal to a passband signal. To represent the act of modulation, we will use the modulation...

Ngày tải lên: 20/11/2012, 11:36

... categories of learning strategies and a number of secondary categories. The primary classification includes an active task approach, realization of language as a means of communication and interaction, ... textual meaning as a whole, and react to the text. Local strategies were: paraphrase, reread, question meaning of a clause or a sentence, question meaning of a word and solve a vocabulary problem. ... strategies: (1) knowing about language (relating to what language and language learning involves, (2) planning (relating to the what and how of language learning) and (3) self-evaluation (relating...

Ngày tải lên: 29/01/2014, 10:33

... TECHNOLOGY SUBSTANCE ABUSE TERRORISM AND HOMELAND SECURITY TRANSPORTATION AND INFRASTRUCTURE WORKFORCE AND WORKPLACE The RAND Corporation is a nonprofit research organization providing objective analysis and ... document THE ARTS CHILD POLICY CIVIL JUSTICE EDUCATION ENERGY AND ENVIRONMENT HEALTH AND HEALTH CARE INTERNATIONAL AFFAIRS NATIONAL SECURITY POPULATION AND AGING PUBLIC SAFETY SCIENCE AND TECHNOLOGY SUBSTANCE ... Rights Visit RAND at www.rand.org Explore the RAND Corporation View document details For More Information This PDF document was made available from www.rand.org as a public service of the RAND Corporation. 6 Jump...

Ngày tải lên: 17/02/2014, 23:20

... company based in Cedar Rapids, Iowa.— Decisionmark is a leader in providing software and data solutions to television and radio broadcasters and consumers. We have been at the forefront of accurately ... Pennsylvania TOM ALLEN, Maine JIM DAVIS, Florida JAN SCHAKOWSKY, Illinois HILDA L. SOLIS, California CHARLES A. GONZALEZ, Texas JAY INSLEE, Washington TAMMY BALDWIN, Wisconsin MIKE ROSS, Arkansas B UD A LBRIGHT , ... the curtain. What you will find is a cabal of ‘‘wizards’’ laboring at the levers of programming, using broadcast signals and on- erous leverage to gain carriage of other programming that would...

Ngày tải lên: 18/02/2014, 00:20

... modeled as a pop- ulation of "grammars", the set of all principled lan- guage variations made available by the biological en- dowment of the human language faculty. Each gram- mar ... grammars. 2.6 Learning in a Parametric Space Suppose that natural language grammars vary in a parametric space, as cross-linguistic studies sug- gest. 3 We can then study the dynamical behaviors ... seen examples. Many variants and gener- alizations of this scheme are studied in Atkinson et al. (1965), and their thorough mathematical treat- ments can be found in Narendra and Thathac!lar (1989)....

Ngày tải lên: 20/02/2014, 19:20

... Perrault, R. and Allen F. A Plan-Based Analysis of Indirect Speech Acts. American Journal of Computational Linguistics, v. 6, n. 3, 1980. 42 TOWARDS A THEORY OF COMPREHENSION OF DECLARATIVE ... ACCOUNTS. FOR EACH ACCOUNT THE BANK WANTS A LIST SHOWING THE BALANCE AT THE BEGINNING OF THE PERIOD, THE NUMBER OF DEPOSITS AND WITHDRAWALS, AND THE FINAL BALANCE. THE ACCOUNTS AND TRANSACTIONS ... of Maryland, 1980. Wilks, Y. An Artificial Intelligence Approach to Machine Translation. In Schank and Colby (eds.) Computer Models of Thought and Language. San Francisco, W. H. Freeman and...

Ngày tải lên: 21/02/2014, 20:20

... H b , < e y ', e x b y ', e x b <y  ', < b  e y >H b , b ', @ e x ) e x b <y>H b , b ', @< e y ZKHUH )  H b , b ',  7KH ... WKDW M [ MAM [ M e y   IRU nQLWH W+HQFH M H b  MAM H b  M e y M [ MAM [ M e y    6LQFH M ' M e y   WKH SURSHUW\  KROGV E\ YLUWXH RI WKH HOHPHQWDU\ LQHTXDOLW\ H b  b '  & M H b  MAM H b  M  ... ,QnQLWH 'LPHQVLRQV&DP EULGJH 8QLYHUVLW\ 3UHVV 1HZ <RUN >@ 'HOODFKHULH & 0H\HU 3$   3UREDELOLWuHV HW SRWHQWLHOYROXPHVDQG +HUPDQQ 3DULV >@ 'HOEDHQ...

Ngày tải lên: 06/03/2014, 08:20

... and Geometry speaks constantly and freely of sensations of Space, and as there can be no denial of the fact that Space is a constituent of the Towards a Theory of Knowledge, by Alexander Philip ... forms of our dynamic Activity that we find the idea of Space so necessary and fundamental. But it will perhaps be argued that our ordinary sensations carry with them a spatial meaning and implication, and ... bonds of Materiality and Death encourages in mankind the Hope of an existence beyond the impenetrable veil of physical limitation. And this at any rate may be admitted, namely, that that dynamic condition...

Ngày tải lên: 07/03/2014, 04:20

... Research Report No. 76-2 [Quirk 72] Quirk, R. et al. ; A Grammar of Contemporary English; Longmans Co., London [Reichman 81] Reichman, R.; "Plain Speaking: A Theory and Grammar of Spontaneous ... rather say 78 The alternative is [Note 77 and 78 are whole phrases]. II Attitudinal expressions These adverbs indicate a degree of belief of the speaker. primarily, principally, especially, ... relations for a couple of words. Reichman ([Reichman 81]) associates certain expressions with particular conversational moves, but there is no unified attempt at classification. We develop a...

Ngày tải lên: 08/03/2014, 18:20

... The Ashanti are an AKAN-speaking people of central Ghana and neighboring regions of Togo and Ivory Coast, numbering more than 900,000. They subsist primarily by farming cacao, a major cash ... relative clauses, not all full clauses can be reduced to participial adjectives. 2. The characteristics of the available attachment points, especiafly the grammatical constraints that they ... to a clause, another sentence add,~cl tO a paragraph, and so on. Which attachment points exist at any moment is a function of the surface structure's configuration at that moment and...

Ngày tải lên: 09/03/2014, 01:20

... Dasgupta, A. (2000) “Financial Contagion through Capital Connections: A Model of the Origin and Spread of Banking Panics,” Working Paper, London School of Economics. [16] De Bandt, O. and P. Hartmann ... Suppose that the probabilities of the good state and the high return are the same as before for each bank. That is, the probabilities have the same value ex-ante for all banks, the return realizations are ... function of managers and demonstrates its countervailing effect over a set of parameters. In our paper, managers maximize bank profits, and yet there is herding. This suggests that aligning man- agerial...

Ngày tải lên: 15/03/2014, 09:20