Undesired signal power estimation based on estimated superposed band for multicarrier transmission

Yohei Shibata, Tomoaki Ohtsuki, Jun Mashinot

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

Abstract

Superposed multicarrier transmission scheme is known to improve frequency utilization efficiency where several wireless systems share spectrum. On superposed band, log likelihood ratio (LLR) cannot be set correctly due to interference, which results in BER (Bit Error Rate) degradation. Forward error correction (FEC) metric masking is proposed to suppress the effect of interference. In this technique, LLRs corresponding to superposed band is set to zero, because received bits corresponding to superposed band is unreliable. This scheme requires superposed band detection and does not consider channel estimation error. We proposed an iterative estimation technique for undesired signal power in [6]. Although this scheme does not require superposed detection beforehand, due to the estimation error of undesired signal power, BER is degraded. In this paper, we propose an estimation technique for undesired signal power and superposed band to calculate LLR correctly. This scheme estimates the superposed band within 1 packet and based on the information about the superposed band, undesired signal power is estimated using pilot symbols. Simulation results show that as the number of pilot symbols increases, BER of our proposed scheme becomes better than that of [6] and gets closer to the BER when the estimation of undesired signal power is perfect.

Original languageEnglish
Title of host publication2015 21st Asia-Pacific Conference on Communications, APCC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages642-646
Number of pages5
ISBN (Print)9784885523014
DOIs
Publication statusPublished - 2016 Feb 17
Event21st Asia-Pacific Conference on Communications, APCC 2015 - Kyoto, Japan
Duration: 2015 Oct 142015 Oct 16

Other

Other21st Asia-Pacific Conference on Communications, APCC 2015
CountryJapan
CityKyoto
Period15/10/1415/10/16

ASJC Scopus subject areas

  • Computer Networks and Communications

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    Shibata, Y., Ohtsuki, T., & Mashinot, J. (2016). Undesired signal power estimation based on estimated superposed band for multicarrier transmission. In 2015 21st Asia-Pacific Conference on Communications, APCC 2015 (pp. 642-646). [7412586] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APCC.2015.7412586