TY - GEN
T1 - Coding applications in satellite communication systems [invited paper]
AU - McGrath, Sean
N1 - Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 1999.
PY - 1999
Y1 - 1999
N2 - This paper provides a brief insight in satellite communication systems from the perspective of coding applications. CDMA based systems for use in Low Earth Orbit (LEO) satellite systems is the focus of the paper. The code-division-multiple-access (CDMA) format is emerging as a dominant air interface technology for cellular, personal-communications-services (PCS) as well as satellite installations. This transmission technology relies on a combination of spread-spectrum modulation, Walsh coding, and sophisticated power-control techniques. In a typical CDMA transmitter, a data signal is encoded using a Walsh code and then mixed with the RF carrier, which has been spread using a pseudorandom-noise (PN) source. In a base-station transmitter, multiple data signals are assigned unique Walsh codes and combined. In the CDMA receiver, the signal is filtered and fed to a correlator, where it is despread and digitally filtered to extract the Walsh code. The paper examines some weaknesses of such systems.
AB - This paper provides a brief insight in satellite communication systems from the perspective of coding applications. CDMA based systems for use in Low Earth Orbit (LEO) satellite systems is the focus of the paper. The code-division-multiple-access (CDMA) format is emerging as a dominant air interface technology for cellular, personal-communications-services (PCS) as well as satellite installations. This transmission technology relies on a combination of spread-spectrum modulation, Walsh coding, and sophisticated power-control techniques. In a typical CDMA transmitter, a data signal is encoded using a Walsh code and then mixed with the RF carrier, which has been spread using a pseudorandom-noise (PN) source. In a base-station transmitter, multiple data signals are assigned unique Walsh codes and combined. In the CDMA receiver, the signal is filtered and fed to a correlator, where it is despread and digitally filtered to extract the Walsh code. The paper examines some weaknesses of such systems.
UR - http://www.scopus.com/inward/record.url?scp=84961299112&partnerID=8YFLogxK
U2 - 10.1007/3-540-46665-7_8
DO - 10.1007/3-540-46665-7_8
M3 - Conference contribution
AN - SCOPUS:84961299112
SN - 354066887X
SN - 9783540668879
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 81
EP - 83
BT - Cryptography and Coding - 7th IMA International Conference, Proceedings
A2 - Walker, Michael
PB - Springer Verlag
T2 - 7th IMA International Conference on Cryptography and Coding, 1999
Y2 - 20 December 1999 through 22 December 1999
ER -