47 search results - page 7 / 10 » Spreading Signals in the Wideband Limit |
COMCOM
2008
14 years 9 months ago
2008
Code allocation has a significant impact on the performance of Code Division Multiple Access (CDMA) systems. For the uplink direction, in 3G Wideband CDMA (WCDMA) cellular systems...
80
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JSAC
2008
14 years 9 months ago
2008
A multiband OFDM transmitter and receiver are presented for underwater communications at low SNR. Compared with a single-band OFDM scheme, the multiband approach leads to a conside...
GLOBECOM
2009
IEEE
15 years 4 months ago
2009
IEEE
Abstract—This paper studies large randomly spread directsequence code-division multiple-access system operating over a block fading multipath channel. Channel knowledge is obtain...
ICDCS
2010
IEEE
15 years 1 months ago
2010
IEEE
—Wireless communication is particularly vulnerable to signal jamming attacks. Spread spectrum mitigates such problem by spreading normal narrowband signals over a much wider band...
112
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TSP
2012
13 years 5 months ago
2012
—Despite that underwater acoustic channels are well known to contain various interferences, research on interference mitigation in underwater acoustic communications has been ver...