Abstract
This paper proposes a bit-stream-arranged weighted modulation scheme to improve voice quality in frequency selective fading channels. The proposed modulation scheme employs an input bit stream arrangement method which changes the bit stream order for important bits so that they do not adjoin each other over time and a mapping method which controls the amplitude of modulation signals according to the importance of the bits. Computer simulations clarify that the proposed bit-stream-arranged weighted modulation scheme shows a noise reduction of 7 dB in voice signal compared with the conventional π/4-shift DQPSK modulation scheme.
| Original language | English |
|---|---|
| Title of host publication | Conference Record / IEEE Global Telecommunications Conference |
| Editors | Anon |
| Place of Publication | Piscataway, NJ, United States |
| Publisher | IEEE |
| Pages | 1258-1262 |
| Number of pages | 5 |
| Volume | 2 |
| Publication status | Published - 1996 |
| Externally published | Yes |
| Event | Proceedings of the 1996 IEEE Communications Theory Mini-Conference. Part 4 (of 4) - London, UK Duration: 1996 Nov 18 → 1996 Nov 22 |
Other
| Other | Proceedings of the 1996 IEEE Communications Theory Mini-Conference. Part 4 (of 4) |
|---|---|
| City | London, UK |
| Period | 96/11/18 → 96/11/22 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Global and Planetary Change
Cite this
Bit-stream-arranged weighted modulation scheme for frequency selective fading channels. / Kobayashi, Kiyoshi; Kubota, Shuji.
Conference Record / IEEE Global Telecommunications Conference. ed. / Anon. Vol. 2 Piscataway, NJ, United States : IEEE, 1996. p. 1258-1262.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Bit-stream-arranged weighted modulation scheme for frequency selective fading channels
AU - Kobayashi, Kiyoshi
AU - Kubota, Shuji
PY - 1996
Y1 - 1996
N2 - This paper proposes a bit-stream-arranged weighted modulation scheme to improve voice quality in frequency selective fading channels. The proposed modulation scheme employs an input bit stream arrangement method which changes the bit stream order for important bits so that they do not adjoin each other over time and a mapping method which controls the amplitude of modulation signals according to the importance of the bits. Computer simulations clarify that the proposed bit-stream-arranged weighted modulation scheme shows a noise reduction of 7 dB in voice signal compared with the conventional π/4-shift DQPSK modulation scheme.
AB - This paper proposes a bit-stream-arranged weighted modulation scheme to improve voice quality in frequency selective fading channels. The proposed modulation scheme employs an input bit stream arrangement method which changes the bit stream order for important bits so that they do not adjoin each other over time and a mapping method which controls the amplitude of modulation signals according to the importance of the bits. Computer simulations clarify that the proposed bit-stream-arranged weighted modulation scheme shows a noise reduction of 7 dB in voice signal compared with the conventional π/4-shift DQPSK modulation scheme.
UR - http://www.scopus.com/inward/record.url?scp=0030349827&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030349827&partnerID=8YFLogxK
M3 - Conference contribution
VL - 2
SP - 1258
EP - 1262
BT - Conference Record / IEEE Global Telecommunications Conference
A2 - Anon, null
PB - IEEE
CY - Piscataway, NJ, United States
ER -