Analysis of time variant reliability information used in a multilevel decoding scheme for RFID and sensor signals
| Autor: | Rebekka Carmen Jacobi, Anton Grabmaier, Dorothea Kolossa, Gerd vom Bögel |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Scheme (programming language)
Computer science Materialtechnik 020206 networking & telecommunications Radio frequency identification maximum-likelihood decoding 02 engineering and technology sensors Industrial and Manufacturing Engineering Management Information Systems bayes methods Management of Technology and Innovation 0202 electrical engineering electronic engineering information engineering Electronic engineering 020201 artificial intelligence & image processing Electrical and Electronic Engineering matched filters Viterbi algorithm computer Decoding methods Reliability (statistics) computer.programming_language |
| Popis: | In medicine and other high-tech sectors, mobile RFID or sensor transponder systems are designed with high-Q antenna coils to increase the energy efficiency. Hence, the range of inductively coupled systems is improved; however, the bandwidth is decreased by 1 over Q . As a result, the reading performance is not limited by the energy supply, but instead by a high bit error rate. In this paper, we describe how the data detection in such narrow-band systems can be improved by a multilevel decoding scheme composed of an advanced maximum-likelihood receiver in the first stage and a soft Viterbi decoding scheme utilizing time variant reliability information in the second stage. An analysis of potential time-variant reliability information is given. The analysis relies on an underlying Bayesian model, which provides an a-posteriori probability indicating the reliability of the received input. As the final building block, a last decoding stage is discussed, which can be composed of a forward error correction that further exploits the reliability information at the second decoder output. Overall, the suggested system architecture results in a notable improvement of both bit and packet error rate, thus allowing the use of high-quality-factor antennas for efficient and reliable mobile RFID systems. |
| Databáze: | OpenAIRE |
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