# Personal wiki

Welcome to my little knowledge graph! I try to write down concepts as I learn and understand them to solidify my own grasp of them. For now, this wiki is focused on wireless communications and related math and programming ideas, because that's what I have been spending most of my time on recently.

This site is written in and published with emacs, using org-mode and org-roam.

I can't claim to be an expert in this field, but I try to write things down after I have a personally satisfactory understanding of them, so if you have any questions about something here feel free to contact me!

- additive white gaussian noise
- autocorrelation
- bandlimited signal
- bandwidth
- baseband signal
- bessel function
- binary phase shift keying
- channel capacity
- channel delay spread
- channel taps
- circulant matrix
- circular convolution
- closed set
- coherence bandwidth
- coherence time
- compact set
- complex envelope
- conditional entropy
- constant envelope modulation
- convolution theorem
- cross entropy
- cyclic prefix
- decimation
- dft shifting theorem
- differential entropy
- differential entropy of a gaussian
- digital modulation
- dirac delta function
- doppler frequency shift
- doppler phase shift
- doppler spread
- downsampling
- entropy
- existence and uniqueness theorem
- fft
- finite state markov channel
- fourier matrix
- fourier transform
- frequency response
- gaussian variable
- gray coding
- huffman coding
- ieee802.11
- impulse response
- inter-symbol-interference
- jensen inequality
- joint entropy
- kl divergence
- kleisli composition
- kronecker delta function
- laplace transform
- linear convolution
- linear modulation
- linear time invariant system
- lipschitz continuity
- low pass filter
- markov process
- matched filter
- monad
- monad laws
- multipath
- mutual information
- narrowband fading
- nyquist ISI criterion
- okumura model
- one-to-one
- open ball
- open set
- orthogonal frequency division multiplexing
- parseval's theorem
- passband signal
- path loss
- phase shift keying
- power delay profile
- power spectral density
- pulse amplitude modulation
- pulse shaping
- quadrature amplitude modulation
- quadrature phase shift keying
- quadrature signal
- raised cosine filter
- rayleigh distribution
- rayleigh fading model
- resampling
- rician fading model
- sampling
- schmidl and cox
- shadowing
- shannon-nyquist theorem
- signal basis functions
- signal constellation
- signal space
- signal to noise ratio
- sinc function
- sinc interpolator
- sources of variation
- tapped delay line model
- toeplitz matrix
- transfer function
- uncorrelated scattering
- upsampling
- wide-sense stationary stochastic process
- wideband fading