| Presentation | 1999/3/11 On M-ary/SSMA Systems using Soft Decision Viterbi Decoding Katsuyuki Ito, Masanori Hamamura, Shin'ichi Tachikawa, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we discuss M-ary/SS and SSMA systems, in which a convolutional code is applied before the M-ary/SS modulator at the transmitter and soft decision Viterbi decoding is used after the M-ary/SS demodulator at the receiver. First, we show the proposed system model and describe a soft decision method of M-ary/SS to apply for soft decision Viterbi decoding. Next, we evaluate the system performance in an AWGN environment by computer simulations. As a result, we show BER property of the proposed system is superior to that of a conventional simple M-ary/SS system for BER≦10^<-3> as a example, and is also superior to that of a DS/SS system using convolutional code when the spreading factor Fs becomes more than 21.O. Finally, we discuss the proposed M-ary/SS systems, and its improvements of required Eb/No for BER=10^<-3> and spectral efficiency compared with that of a conventional M-ary/SSMA are shown as a function of spreading factor. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | M-ary/SSMA / soft-decision M-ary/SS / soft-decision Viterbi decoding / spectral efficiency |
| Paper # | IT98-91 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 1999/3/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On M-ary/SSMA Systems using Soft Decision Viterbi Decoding |
| Sub Title (in English) | |
| Keyword(1) | M-ary/SSMA |
| Keyword(2) | soft-decision M-ary/SS |
| Keyword(3) | soft-decision Viterbi decoding |
| Keyword(4) | spectral efficiency |
| 1st Author's Name | Katsuyuki Ito |
| 1st Author's Affiliation | Tachikawa lab., Faculty of Engineering, Nagaoka University of Technology() |
| 2nd Author's Name | Masanori Hamamura |
| 2nd Author's Affiliation | Tachikawa lab., Faculty of Engineering, Nagaoka University of Technology:Research Fellow of the Japan Society for the Promotion of Science |
| 3rd Author's Name | Shin'ichi Tachikawa |
| 3rd Author's Affiliation | Tachikawa lab., Faculty of Engineering, Nagaoka University of Technology |
| Date | 1999/3/11 |
| Paper # | IT98-91 |
| Volume (vol) | vol.98 |
| Number (no) | 656 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |