Coherent hybrid DS-FFH CDMA with adaptive interference cancelling for cellular mobile communications

Shigeru Tomisato, Kazuhiko Fukawa, Hiroshi Suzuki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper proposes Coherent-HYBrid Direct-Sequence Fast-Frequency-Hopping (CHYB-DS-FFH) CDMA with Adaptive Interference Cancelling (AIC) for cellular mobile communications. The features of CHYB-DS-FFH are symbol-by-symbol frequency diversity and low chip-rate DS multiplexing; both of which are based on a coherent FFH modulation and demodulation scheme. The combination of coherent FFH, space diversity, and AIC is very effective for reducing the performance degradation due to interference. Computer simulations demonstrate BER performance of a 2 hop 500-kHz-interval frequency hopping system using (i) a linear canceller or (ii) a nonlinear canceller. Both systems employ the two branch space diversity reception of 10 kb/s QPSK with FFH over a 1 MHz system bandwidth. In quasi-static channels, the average BER performance is 10-2 with average Eb/No less than 8 dB. In dynamic fading channels under full interference conditions, CHYB-DS-FFH with the linear adaptive interference canceller realizes a BER of 10-2 at the average Eb/No of 15 dB with maximum Doppler frequency fD of 5 Hz, whereas CHYB-DS-FFH with the non-linear adaptive interference canceller achieves the same BER at the average Eb/No of 15 dB with fD equal to 30 Hz.

Original languageEnglish
Pages (from-to)589-597
Number of pages9
JournalIEICE Transactions on Communications
VolumeE77-B
Issue number5
Publication statusPublished - May 1994
Externally publishedYes

Fingerprint

Frequency hopping
Code division multiple access
Communication
Diversity reception
Quadrature phase shift keying
Demodulation
Multiplexing
Fading channels
Modulation
Bandwidth
Degradation
Computer simulation

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Coherent hybrid DS-FFH CDMA with adaptive interference cancelling for cellular mobile communications. / Tomisato, Shigeru; Fukawa, Kazuhiko; Suzuki, Hiroshi.

In: IEICE Transactions on Communications, Vol. E77-B, No. 5, 05.1994, p. 589-597.

Research output: Contribution to journalArticle

@article{f53b9a03c54e4b5e8418217e6a67901c,
title = "Coherent hybrid DS-FFH CDMA with adaptive interference cancelling for cellular mobile communications",
abstract = "This paper proposes Coherent-HYBrid Direct-Sequence Fast-Frequency-Hopping (CHYB-DS-FFH) CDMA with Adaptive Interference Cancelling (AIC) for cellular mobile communications. The features of CHYB-DS-FFH are symbol-by-symbol frequency diversity and low chip-rate DS multiplexing; both of which are based on a coherent FFH modulation and demodulation scheme. The combination of coherent FFH, space diversity, and AIC is very effective for reducing the performance degradation due to interference. Computer simulations demonstrate BER performance of a 2 hop 500-kHz-interval frequency hopping system using (i) a linear canceller or (ii) a nonlinear canceller. Both systems employ the two branch space diversity reception of 10 kb/s QPSK with FFH over a 1 MHz system bandwidth. In quasi-static channels, the average BER performance is 10-2 with average Eb/No less than 8 dB. In dynamic fading channels under full interference conditions, CHYB-DS-FFH with the linear adaptive interference canceller realizes a BER of 10-2 at the average Eb/No of 15 dB with maximum Doppler frequency fD of 5 Hz, whereas CHYB-DS-FFH with the non-linear adaptive interference canceller achieves the same BER at the average Eb/No of 15 dB with fD equal to 30 Hz.",
author = "Shigeru Tomisato and Kazuhiko Fukawa and Hiroshi Suzuki",
year = "1994",
month = "5",
language = "English",
volume = "E77-B",
pages = "589--597",
journal = "IEICE Transactions on Communications",
issn = "0916-8516",
publisher = "Maruzen Co., Ltd/Maruzen Kabushikikaisha",
number = "5",

}

TY - JOUR

T1 - Coherent hybrid DS-FFH CDMA with adaptive interference cancelling for cellular mobile communications

AU - Tomisato, Shigeru

AU - Fukawa, Kazuhiko

AU - Suzuki, Hiroshi

PY - 1994/5

Y1 - 1994/5

N2 - This paper proposes Coherent-HYBrid Direct-Sequence Fast-Frequency-Hopping (CHYB-DS-FFH) CDMA with Adaptive Interference Cancelling (AIC) for cellular mobile communications. The features of CHYB-DS-FFH are symbol-by-symbol frequency diversity and low chip-rate DS multiplexing; both of which are based on a coherent FFH modulation and demodulation scheme. The combination of coherent FFH, space diversity, and AIC is very effective for reducing the performance degradation due to interference. Computer simulations demonstrate BER performance of a 2 hop 500-kHz-interval frequency hopping system using (i) a linear canceller or (ii) a nonlinear canceller. Both systems employ the two branch space diversity reception of 10 kb/s QPSK with FFH over a 1 MHz system bandwidth. In quasi-static channels, the average BER performance is 10-2 with average Eb/No less than 8 dB. In dynamic fading channels under full interference conditions, CHYB-DS-FFH with the linear adaptive interference canceller realizes a BER of 10-2 at the average Eb/No of 15 dB with maximum Doppler frequency fD of 5 Hz, whereas CHYB-DS-FFH with the non-linear adaptive interference canceller achieves the same BER at the average Eb/No of 15 dB with fD equal to 30 Hz.

AB - This paper proposes Coherent-HYBrid Direct-Sequence Fast-Frequency-Hopping (CHYB-DS-FFH) CDMA with Adaptive Interference Cancelling (AIC) for cellular mobile communications. The features of CHYB-DS-FFH are symbol-by-symbol frequency diversity and low chip-rate DS multiplexing; both of which are based on a coherent FFH modulation and demodulation scheme. The combination of coherent FFH, space diversity, and AIC is very effective for reducing the performance degradation due to interference. Computer simulations demonstrate BER performance of a 2 hop 500-kHz-interval frequency hopping system using (i) a linear canceller or (ii) a nonlinear canceller. Both systems employ the two branch space diversity reception of 10 kb/s QPSK with FFH over a 1 MHz system bandwidth. In quasi-static channels, the average BER performance is 10-2 with average Eb/No less than 8 dB. In dynamic fading channels under full interference conditions, CHYB-DS-FFH with the linear adaptive interference canceller realizes a BER of 10-2 at the average Eb/No of 15 dB with maximum Doppler frequency fD of 5 Hz, whereas CHYB-DS-FFH with the non-linear adaptive interference canceller achieves the same BER at the average Eb/No of 15 dB with fD equal to 30 Hz.

UR - http://www.scopus.com/inward/record.url?scp=0028426799&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028426799&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0028426799

VL - E77-B

SP - 589

EP - 597

JO - IEICE Transactions on Communications

JF - IEICE Transactions on Communications

SN - 0916-8516

IS - 5

ER -