9842 search results - page 1580 / 1969 » Problem complexity |
198
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ICC
2007
IEEE
16 years 1 months ago
2007
IEEE
We consider opportunistic spectrum access for secondary users over multiple channels whose occupancy by primary users is modeled as discrete-time Markov processes. Due to hardware...
148
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ICC
2007
IEEE
16 years 1 months ago
2007
IEEE
Abstract— In this paper differential space–frequency modulation (DSFM) for transmission over multiple–input multiple– output channels using orthogonal frequency division mu...
189
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ICC
2007
IEEE
16 years 1 months ago
2007
IEEE
— Low-Density Parity-Check (LDPC) codes are usually decoded by running an iterative belief-propagation, or message-passing, algorithm over the factor graph of the code. The tradi...
164
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ICDCS
2007
IEEE
16 years 1 months ago
2007
IEEE
An electronic cash system allows users to withdraw coins, represented as bit strings, from a bank or broker, and spend those coins anonymously at participating merchants, so that ...
172
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ICDM
2007
IEEE
16 years 1 months ago
2007
IEEE
Recently, there arise a large number of graphs with massive sizes and complex structures in many new applications, such as biological networks, social networks, and the Web, deman...