TY - GEN
T1 - Superposed transmission of high speed QPSK signals and SSMA-QPSK signals in non-linear channels
AU - Morikura, Masahiro
AU - Sugiyama, Takatoshi
AU - Kazama, Hiroshi
AU - Kubota, Shuji
AU - Kato, Shuzo
N1 - Publisher Copyright:
© 1992 IEEE.
PY - 1992
Y1 - 1992
N2 - This paper proposes a superposed SSMA(Spread Spectrum Multiple Access)-QPSK(Quadrature Phase Shift Keying) signal transmission over a high speed QPSK modulated signal to achieve higher transmission efficiency per transponder and to facilitate a lower power transmitter for SSMA signal transmission. The employment of highcoding-gain FEC (Forward Error Correction) and co-channe! interference cancellation for SSMA-QPSK signals makes it possible to transmit SSMA-QPSK signals over a nonlinearly amplified high speed QPSK signal transmission channel. Experimental results show that the proposed scheme is able to transmit twenty SSMA-QPSK channels and high speed QPSK signals over the same transponder simultaneously and realize a frequency utilization efficiency of 1.530bit/s/Hz (superposed transmission of 60Mbit/s QPSK signals and twenty 32kbit/s SSMA-QPSK signals over a 36MHz transponder) when SSMA-QPSK signal power to QPSK signal power ratio equals -30 dB.
AB - This paper proposes a superposed SSMA(Spread Spectrum Multiple Access)-QPSK(Quadrature Phase Shift Keying) signal transmission over a high speed QPSK modulated signal to achieve higher transmission efficiency per transponder and to facilitate a lower power transmitter for SSMA signal transmission. The employment of highcoding-gain FEC (Forward Error Correction) and co-channe! interference cancellation for SSMA-QPSK signals makes it possible to transmit SSMA-QPSK signals over a nonlinearly amplified high speed QPSK signal transmission channel. Experimental results show that the proposed scheme is able to transmit twenty SSMA-QPSK channels and high speed QPSK signals over the same transponder simultaneously and realize a frequency utilization efficiency of 1.530bit/s/Hz (superposed transmission of 60Mbit/s QPSK signals and twenty 32kbit/s SSMA-QPSK signals over a 36MHz transponder) when SSMA-QPSK signal power to QPSK signal power ratio equals -30 dB.
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U2 - 10.1109/GLOCOM.1992.276422
DO - 10.1109/GLOCOM.1992.276422
M3 - Conference contribution
AN - SCOPUS:85067552973
T3 - GLOBECOM 1992 - Communication for Global Users: IEEE Global Telecommunications Conference
SP - 727
EP - 731
BT - GLOBECOM 1992 - Communication for Global Users
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1992 IEEE Global Telecommunications Conference: Communication for Global Users, GLOBECOM 1992
Y2 - 6 December 1992 through 9 December 1992
ER -