Superposed band detection based on error probability using initial likelihood masking

Tomoaki Ohtsuki, Genji Hayashi, Jun Mashino, Takatoshi Sugiyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Superposed multicarrier transmission scheme is known to improve frequency utilization efficiency where several systems share spectrum without any spectrum spreading techniques. In superposed multicarrier transmission scheme forward error correction (FEC) coding is applied over subcarriers so that the effects of interference caused by superposition is mitigated by interleaving effects. When the interference power is large, the effects of FEC become smaller particularly owing to the mis-setting of initial log likelihood ratio (LLR). To solve this problem, FEC metric masking is proposed where initial LLRs for superposed subcarriers are replaced by neutral value in the receiver followed by decoding. This technique is effective, however, it needs the information about superposed frequency band. In this paper we propose a scheme to detect superposed band by using FEC metric masking. In the proposed scheme, the subcarriers where FEC metric masking is applied are changed and packet error rate (PER) is measured. When the FEC metric masking is applied to the superposed subcarriers, PER is minimized. Based on the change of PER, we can detect the superposed band. We evaluate the proposed scheme by computer simulation and show that it can detect the superposed band with high probability.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
DOIs
Publication statusPublished - 2012
EventIEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Yokohama, Japan
Duration: 2012 May 62012 Jun 9

Other

OtherIEEE 75th Vehicular Technology Conference, VTC Spring 2012
CountryJapan
CityYokohama
Period12/5/612/6/9

Fingerprint

Forward error correction
Masking
Error Correction
Error Probability
Likelihood
Error Rate
Metric
Multicarrier
Interference
Forward Problem
Log-likelihood Ratio
Interleaving
Frequency bands
Superposition
Decoding
Error probability
Receiver
Computer Simulation
Coding
Evaluate

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Ohtsuki, T., Hayashi, G., Mashino, J., & Sugiyama, T. (2012). Superposed band detection based on error probability using initial likelihood masking. In IEEE Vehicular Technology Conference [6240279] https://doi.org/10.1109/VETECS.2012.6240279

Superposed band detection based on error probability using initial likelihood masking. / Ohtsuki, Tomoaki; Hayashi, Genji; Mashino, Jun; Sugiyama, Takatoshi.

IEEE Vehicular Technology Conference. 2012. 6240279.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ohtsuki, T, Hayashi, G, Mashino, J & Sugiyama, T 2012, Superposed band detection based on error probability using initial likelihood masking. in IEEE Vehicular Technology Conference., 6240279, IEEE 75th Vehicular Technology Conference, VTC Spring 2012, Yokohama, Japan, 12/5/6. https://doi.org/10.1109/VETECS.2012.6240279
Ohtsuki T, Hayashi G, Mashino J, Sugiyama T. Superposed band detection based on error probability using initial likelihood masking. In IEEE Vehicular Technology Conference. 2012. 6240279 https://doi.org/10.1109/VETECS.2012.6240279
Ohtsuki, Tomoaki ; Hayashi, Genji ; Mashino, Jun ; Sugiyama, Takatoshi. / Superposed band detection based on error probability using initial likelihood masking. IEEE Vehicular Technology Conference. 2012.
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