Paper Info
Title
Undesired signal power estimation based on estimated superposed band for multicarrier transmission.
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.
Year
Venue
Field
2015
Asia-Pacific Conference on Communications
Forward error correction,Masking (art),Likelihood-ratio test,Computer science,Network packet,Communication channel,Algorithm,Real-time computing,Interference (wave propagation),Statistics,Orthogonal frequency-division multiplexing,Bit error rate
DocType
ISSN
Citations 
Conference
2163-0771
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Yohei Shibatat111.02
Tomoaki Ohtsuki232172.40
Jun Mashino31411.25