207 search results - page 26 / 42 » Digitizing of UWB signals based on frequency channelization |
116
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MOBICOM
2009
ACM
15 years 4 months ago
2009
ACM
Establishing a control channel for medium access control is a challenging problem in multi-channel and dynamic spectrum access (DSA) networks. In the design of multi-channel MAC p...
ICASSP
2011
IEEE
14 years 1 months ago
2011
IEEE
Due to multipath delay spread and relatively high sampling rate in OFDM systems, the channel estimation is formulated as a sparse recovery problem, where a hybrid compressed sensi...
108
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WISEC
2010
ACM
15 years 2 months ago
2010
ACM
Key management in wireless sensor networks does not only face typical, but also several new challenges. The scale, resource limitations, and new threats such as node capture and c...
ICC
2007
IEEE
15 years 4 months ago
2007
IEEE
— We examine the Shannon limits of communication systems when the precision of the analog-to-digital conversion (ADC) at the receiver is constrained. ADC is costly and powerhungr...
ICASSP
2010
IEEE
14 years 10 months ago
2010
IEEE
This paper deals with the problem of under-determined convolutive blind source separation. We model the contribution of each source to all mixture channels in the time-frequency d...