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- 8-PSK modulation (1)
- Block coded modulation (1)
- Combinatorial logic (1)
- Component codes (1)
- Degradation (1)
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- Error power analysis (1)
- Estimation (1)
- Filtering (1)
- Fixed-point arithmetic (1)
- Fuzzy logic (1)
- Gradient descent (1)
- Least reliable bit log-likelihood ratio (1)
- Motor (1)
- Optimization (1)
- Optimum decoding (1)
- Planar approximation (1)
- Rule base reduction (1)
- Signal metric (1)
- Singular value decomposition (1)
Articles 1 - 2 of 2
Full-Text Articles in Engineering
Design And Rule Base Reduction Of A Fuzzy Filter For The Estimation Of Motor Currents, Daniel J. Simon
Design And Rule Base Reduction Of A Fuzzy Filter For The Estimation Of Motor Currents, Daniel J. Simon
Electrical and Computer Engineering Faculty Publications
Fuzzy systems have been used extensively and successfully in control systems over the past few decades, but have been applied much less often to filtering problems. This is somewhat surprising in view of the dual relationship between control and estimation. This paper discusses and demonstrates the application of fuzzy filtering to motor winding current estimation in permanent magnet synchronous motors. Motor winding current estimation is an important problem because in order to implement effective closed-loop control, a good estimation of the current is needed. Motor winding currents are notoriously noisy because of electrical noise in the motor drive. We use …
Planar Approximation For The Least Reliable Bit Log-Likelihood Ratio Of 8-Psk Modulation, William H. Thesling, Fuqin Xiong, M. J. Vanderaar
Planar Approximation For The Least Reliable Bit Log-Likelihood Ratio Of 8-Psk Modulation, William H. Thesling, Fuqin Xiong, M. J. Vanderaar
Electrical and Computer Engineering Faculty Publications
The optimum decoding of component codes in block coded modulation (BCM) schemes requires the use of the log-likelihood ratio (LLR) as the signal metric. An approximation to the LLR for the least reliable bit (LRB) in an 8-PSK modulation based on planar equations with fixed-point arithmetic is developed that is both accurate and easily realisable for practical BCM schemes. Through an error power analysis and an example simulation it is shown that the approximation results in less than 0.06 dB in degradation over the exact expression at an Es/N0 of 10 dB. It is also shown that …