Hybrid pulse position modulation/ultrashort light pulse code division multiple access for data networking

Dan M. Marom, Kwang Soon Kim, Laurence B. Milstein, Yeshaiahu Fainman

Research output: Contribution to journalConference article

Abstract

Future data networks are required to support numerous high-capacity connections while providing simplified management and connectivity. To meet these requirements, we propose to utilize broadband ultrashort light pulses (ULP) in conjunction with pulse position modulation (PPM) as an efficient modulation format and code division multiple access (CDMA) for interference suppression. This networking format is operated asynchronously for simplified control, and requires minimal management for ensuring that the number of active users is below the limit at which multi-user interference generates excessive errors. The pulse positions can be detected at the receiver with high temporal resolution by utilizing a time-to-space conversion operating in real-time. The performance of the PPM/ULP-CDMA is found to depend on the following parameters: the ULP duration, the bandwidth of each spectral chip of the CDMA filter, and the ULP repetition time. We find that employing PPM improves the performance of the system relative to On-Off Keying (OOK). The performance can be further improved by increasing the number of PPM symbols, reducing the spectral chip bandwidth, and reducing the ratio of the pulse duration to repetition time. The performance analysis shows that the proposed system operates at a high bandwidth efficiency.

Original languageEnglish
Pages (from-to)479-484
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4089
Publication statusPublished - 2000 Jan 1

Fingerprint

Pulse Position Modulation
pulse position modulation
Pulse position modulation
code division multiple access
Code Division multiple Access
Networking
Code division multiple access
pulses
bandwidth
Bandwidth
format
repetition
pulse duration
chips
interference
Interference suppression
keying
Chip
temporal resolution
Interference Suppression

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

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abstract = "Future data networks are required to support numerous high-capacity connections while providing simplified management and connectivity. To meet these requirements, we propose to utilize broadband ultrashort light pulses (ULP) in conjunction with pulse position modulation (PPM) as an efficient modulation format and code division multiple access (CDMA) for interference suppression. This networking format is operated asynchronously for simplified control, and requires minimal management for ensuring that the number of active users is below the limit at which multi-user interference generates excessive errors. The pulse positions can be detected at the receiver with high temporal resolution by utilizing a time-to-space conversion operating in real-time. The performance of the PPM/ULP-CDMA is found to depend on the following parameters: the ULP duration, the bandwidth of each spectral chip of the CDMA filter, and the ULP repetition time. We find that employing PPM improves the performance of the system relative to On-Off Keying (OOK). The performance can be further improved by increasing the number of PPM symbols, reducing the spectral chip bandwidth, and reducing the ratio of the pulse duration to repetition time. The performance analysis shows that the proposed system operates at a high bandwidth efficiency.",
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Hybrid pulse position modulation/ultrashort light pulse code division multiple access for data networking. / Marom, Dan M.; Kim, Kwang Soon; Milstein, Laurence B.; Fainman, Yeshaiahu.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4089, 01.01.2000, p. 479-484.

Research output: Contribution to journalConference article

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