512 search results - page 39 / 103 » Random Access Systems with a Time Varying Channel |
INFOCOM
2010
IEEE
14 years 8 months ago
2010
IEEE
—In recent years, the famous wiretap channel has been revisited by many researchers and information theoretic secrecy has become an active area of research in this setting. In th...
VTC
2006
IEEE
15 years 4 months ago
2006
IEEE
—Transmitter-based signal pre-processing is investigated for the two-dimensional (2-D) OFDM-CDMA (orthogonal frequency division multiplexing, code division multiple access) forwa...
CORR
2010
Springer
14 years 9 months ago
2010
Springer
Protocol sequences are used in channel access for the multiple-access collision channel without feedback. A new construction of protocol sequences with a guarantee of worstcase sys...
TIT
2002
14 years 9 months ago
2002
One method for communicating with multiple antennas is to encode the transmitted data differentially using unitary matrices at the transmitter, and to decode differentially withou...
GLOBECOM
2007
IEEE
15 years 4 months ago
2007
IEEE
— A novel cooperative multiple access protocol for packet speech communications is proposed. Cooperation is achieved through a relay node and by exploiting the silence periods du...