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Coherent M-ary spreading-code-phase-shift-keying modulation for direct-sequence spread spectrum systems

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1 Author(s)
Yuh-Ren Tsai ; Inst. of Commun. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

In this work, a generalized form of spreading-code-phase-shift-keying (SCPSK) modulation is proposed. The performance of M-SCPSK modulation with a coherent receiver in an AWGN channel, exposed to multi-user interference, is investigated. Two types of M-ary SCPSK modulation - one employing short spreading codes and the other employing long spreading codes - are examined and the union bounds of symbol error probabilities are derived. Additionally, feasible designs of the M-CPSK transmitter and receiver are proposed. The M-SCPSK system employing long spreading codes is found to be more flexible and therefore more suitable for packet data service applications.

Published in:

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th  (Volume:1 )

Date of Conference:

26-29 Sept. 2004

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