Time diversity CDMA scheme employing orthogonal modulation for time varying channels

Shuji Kubota; Shuzo Kato; Kamilo Feher

Time diversity CDMA scheme employing orthogonal modulation for time varying channels

Shuji Kubota, Shuzo Kato, Kamilo Feher

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In order to increase the channel capacity of CDMA (Code Division Multiple Access) mobile and personal communication systems, a new time diversity CDMA scheme that employs orthogonal modulation is proposed. The time diversity CDMA scheme with orthogonal modulation reduces the required Eb/(No + Io) by 5dB at Pe = 10^-2 in Rayleigh fading environments with fDT (the product of Doppler frequency and one symbol duration) values ranging from 0.002 to 0.02. This improvement in required Eb/(No + Io) significantly increases the channel capacity of CDMA communication systems that have time varying channels. In addition, the computer simulation results show that the required time delay values of the time diversity scheme are reasonably short (20-100 symbols for 10kbps transmission) for fDT values ranging from 0.002 to 0.02.

Original language	English
Title of host publication	IEEE Vehicular Technology Conference
Publisher	Publ by IEEE
Pages	444-447
Number of pages	4
ISBN (Print)	078031266X
Publication status	Published - 1993 Jan 1
Externally published	Yes
Event	Proceedings of the 43rd IEEE Vehicular Technology Conference - Secaucus, NJ, USA Duration: 1993 May 18 → 1993 May 20

Publication series

Name	IEEE Vehicular Technology Conference
ISSN (Print)	0740-0551

Other

Other	Proceedings of the 43rd IEEE Vehicular Technology Conference
City	Secaucus, NJ, USA
Period	93/5/18 → 93/5/20

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Cite this

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title = "Time diversity CDMA scheme employing orthogonal modulation for time varying channels",

abstract = "In order to increase the channel capacity of CDMA (Code Division Multiple Access) mobile and personal communication systems, a new time diversity CDMA scheme that employs orthogonal modulation is proposed. The time diversity CDMA scheme with orthogonal modulation reduces the required Eb/(No + Io) by 5dB at Pe = 10-2 in Rayleigh fading environments with fDT (the product of Doppler frequency and one symbol duration) values ranging from 0.002 to 0.02. This improvement in required Eb/(No + Io) significantly increases the channel capacity of CDMA communication systems that have time varying channels. In addition, the computer simulation results show that the required time delay values of the time diversity scheme are reasonably short (20-100 symbols for 10kbps transmission) for fDT values ranging from 0.002 to 0.02.",

author = "Shuji Kubota and Shuzo Kato and Kamilo Feher",

year = "1993",

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day = "1",

language = "English",

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series = "IEEE Vehicular Technology Conference",

publisher = "Publ by IEEE",

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booktitle = "IEEE Vehicular Technology Conference",

note = "Proceedings of the 43rd IEEE Vehicular Technology Conference ; Conference date: 18-05-1993 Through 20-05-1993",

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TY - GEN

T1 - Time diversity CDMA scheme employing orthogonal modulation for time varying channels

AU - Kubota, Shuji

AU - Kato, Shuzo

AU - Feher, Kamilo

PY - 1993/1/1

Y1 - 1993/1/1

N2 - In order to increase the channel capacity of CDMA (Code Division Multiple Access) mobile and personal communication systems, a new time diversity CDMA scheme that employs orthogonal modulation is proposed. The time diversity CDMA scheme with orthogonal modulation reduces the required Eb/(No + Io) by 5dB at Pe = 10-2 in Rayleigh fading environments with fDT (the product of Doppler frequency and one symbol duration) values ranging from 0.002 to 0.02. This improvement in required Eb/(No + Io) significantly increases the channel capacity of CDMA communication systems that have time varying channels. In addition, the computer simulation results show that the required time delay values of the time diversity scheme are reasonably short (20-100 symbols for 10kbps transmission) for fDT values ranging from 0.002 to 0.02.

AB - In order to increase the channel capacity of CDMA (Code Division Multiple Access) mobile and personal communication systems, a new time diversity CDMA scheme that employs orthogonal modulation is proposed. The time diversity CDMA scheme with orthogonal modulation reduces the required Eb/(No + Io) by 5dB at Pe = 10-2 in Rayleigh fading environments with fDT (the product of Doppler frequency and one symbol duration) values ranging from 0.002 to 0.02. This improvement in required Eb/(No + Io) significantly increases the channel capacity of CDMA communication systems that have time varying channels. In addition, the computer simulation results show that the required time delay values of the time diversity scheme are reasonably short (20-100 symbols for 10kbps transmission) for fDT values ranging from 0.002 to 0.02.

UR - http://www.scopus.com/inward/record.url?scp=0027307086&partnerID=8YFLogxK

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M3 - Conference contribution

AN - SCOPUS:0027307086

SN - 078031266X

T3 - IEEE Vehicular Technology Conference

SP - 444

EP - 447

BT - IEEE Vehicular Technology Conference

PB - Publ by IEEE

T2 - Proceedings of the 43rd IEEE Vehicular Technology Conference

Y2 - 18 May 1993 through 20 May 1993

ER -

Time diversity CDMA scheme employing orthogonal modulation for time varying channels

Abstract

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ASJC Scopus subject areas

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