LSTM	Long Short-Term Memory
CNN	Convolutional Neural Network
GPS	Global Positioning System
BLE	Bluetooth Low Energy
RSSI	Received Signal Strength Indicator
RTT	Round-Trip Time
PSO	Particle Swarm Optimization
DR	Dead Reckoning
DTW	Dynamic Time Warping
HMMs	Hidden Markov Models
FFT	Fast Fourier Transform
PCA	Principal Component Analysis
KPCA	Kernal Principal Component Analysis
CDD	Android Compatibility Definition Document
API	Application Programming Interface
SDK	Software Development Kit
ReLU	Rectified Linear Unit