Here is a list of all documented files with brief descriptions:

itpp
base
algebra
cholesky.cpp	Implementation of Cholesky factorisation functions
cholesky.h	Definitions of Cholesky factorisation functions
det.cpp	Implementation of determinant calculations
det.h	Definitions of determinant calculations
eigen.cpp	Eigenvalue decomposition functions
eigen.h	Definitions of eigenvalue decomposition functions
inv.cpp	Implementation of matrix inversion routines
inv.h	Definitions of matrix inversion routines
ls_solve.cpp	Implementation of functions for solving linear equation systems
ls_solve.h	Definitions of functions for solving linear equation systems
lu.cpp	Implementation of LU factorisation functions
lu.h	Definitions of LU factorisation functions
qr.cpp	Implementation of QR factorisation functions
qr.h	Definitions of QR factorisation functions
schur.cpp	Schur decomposition functions
schur.h	Definitions of Schur decomposition functions
svd.cpp	Implementation of Singular Value Decompositions
svd.h	Definitions of Singular Value Decompositions
math
elem_math.cpp	Elementary mathematical functions - source file
elem_math.h	Elementary mathematical functions - header file
error.cpp	Error functions - source file
error.h	Error functions - header file
integration.cpp	Implementation of numerical integration
integration.h	Definition of numerical integration
log_exp.cpp	Logarithmic and exponenential functions - source file
log_exp.h	Logarithmic and exponenential functions - header file
min_max.h	Minimum and maximum functions on vectors and matrices
misc.cpp	Miscellaneous functions - source file
misc.h	Miscellaneous functions - header file
trig_hyp.cpp	Trigonometric and hyperbolic functions - source file
trig_hyp.h	Trigonometric and hyperbolic functions - header file
array.h	Definition of Array class (container)
base_exports.h	Import/Export definitions for some templates defined in base folder
bessel.cpp	Implementation of Bessel functions
bessel.h	Definitions of Bessel functions
binary.cpp	Binary class implemenations
binary.h	Binary class definition
binfile.cpp	Binary file formats implementations
binfile.h	Binary file formats definitions
circular_buffer.h	Circular_Buffer class (container)
converters.cpp	Implementation of converters between different vector and matrix types
converters.h	Definitions of converters between different vector and matrix types
copy_vector.cpp	Vector copy functions for internal use
copy_vector.h	Vector copy functions for internal use
factory.h	Base class for class factories and memory allocation functions
fastmath.cpp	Implementation of special operations on vectors and matricies optimized for speed
fastmath.h	Definitions of special operations on vectors and matricies optimized for speed
gf2mat.cpp	Implementation of a class for algebra on GF(2) (binary) matrices
gf2mat.h	Definition of a class for algebra on GF(2) (binary) matrices
help_functions.cpp	Help functions to make functions with vec and mat as arguments
help_functions.h	Help functions to make functions with vec and mat as arguments
itassert.cpp	Error handling functions - source file
itassert.h	Error handling functions - header file
itcompat.cpp	IT++ compatibility types and functions
itcompat.h	IT++ compatibility types and functions
itfile.cpp	Implementation of classes for the IT++ file format
itfile.h	Definition of classes for the IT++ file format
ittypes.h	IT++ type definitions
mat.cpp	Matrix Class Implementation
mat.h	Matrix Class Definitions
matfunc.cpp	Various functions on vectors and matrices - source file
matfunc.h	Various functions on vectors and matrices - header file
operators.cpp	Implementation of operators for vectors and matricies of different types
operators.h	Definitions of operators for vectors and matricies of different types
parser.cpp	Implementation of an argument parser class
parser.h	Definition of an argument parser class
random.cpp	Implementation of classes for random number generators
random.h	Definition of classes for random number generators
random_dsfmt.h	C++ implementation of dSFMT random number generator
smat.cpp	Sparse Matrix Class implementation
smat.h	Sparse Matrix Class Definitions
sort.h	Sorting functions
specmat.cpp	Implementation of special vectors and matrices
specmat.h	Definitions of special vectors and matrices
stack.h	Stack class (container)
svec.cpp	Sparse Vector Class implementation
svec.h	Sparse Vector Class definitions
timing.cpp	Implementation of Timing classes
timing.h	Definitions of Timing classes
vec.cpp	Templated Vector Class Implementation
vec.h	Templated Vector Class Definitions
comm
bch.cpp	Implementation of a BCH encoder/decoder class
bch.h	Definition of a BCH encoder/decoder class
channel.cpp	Communication Channels' classes - source file
channel.h	Communication channels' classes - header file
channel_code.h	Channel Code class virtual interface
commfunc.cpp	Implementation of some specific functions useful in communications
commfunc.h	Definitions of some specific functions useful in communications
convcode.cpp	Implementation of a binary convolutional encoder class
convcode.h	Definition of a binary convolutional encoder class
crc.cpp	Implementation of a CRC code class
crc.h	Definition of a CRC code class
egolay.cpp	Implementation of the Extended Golay Code (24, 12, 8)
egolay.h	Definition of the Extended Golay Code (24, 12, 8)
error_counters.cpp	Implementation of Bit Error Rate Counter (BERC) and BLock Error Rate Counter (BLERC) classes
error_counters.h	Definitions of Bit Error Rate Counter (BERC) and BLock Error Rate Counter (BLERC) classes
exit.cpp	Implementation of EXtrinsic Information Transfer (EXIT) chart class
exit.h	Definitions for EXtrinsic Information Transfer (EXIT) chart class
galois.cpp	Implementation of Galois Field algebra classes and functions
galois.h	Definitions of Galois Field algebra classes and functions
hammcode.cpp	Implementation of a Hamming code class
hammcode.h	Definitions of a Hamming code class
interleave.cpp	Implementation of interleaver classes
interleave.h	Definitions of interleaver classes
ldpc.cpp	Implementation of Low-Density Parity Check (LDPC) codes
ldpc.h	Implementation of Low-Density Parity Check (LDPC) codes
llr.cpp	Class for numerically efficient log-likelihood algebra
llr.h	Class for numerically efficient log-likelihood algebra
modulator.cpp	One- and two-dimensional modulators - source file
modulator.h	One- and two-dimensional modulators - header file
modulator_nd.cpp	Implementation of vector (MIMO) modulator classes
modulator_nd.h	Definition of vector (MIMO) modulator classes
multilateration.cpp	Implementation of multilateration class for indoor localization
multilateration.h	Definition of multilateration class for indoor localization
ofdm.cpp	Implementation of an Orthogonal Frequency Division Multiplex (OFDM) class
ofdm.h	Interface of an Orthogonal Frequency Division Multiplex (OFDM) class
pulse_shape.cpp	Pulse shaping classes - source file
pulse_shape.h	Pulse shaping classes - header file
punct_convcode.cpp	Implementation of a Binary Punctured Convolutional Encoder class
punct_convcode.h	Definitions of a Binary Punctured Convolutional Encoder class
rec_syst_conv_code.cpp	Implementation of a Recursive Systematic Convolutional codec class
rec_syst_conv_code.h	Definitions of a Recursive Systematic Convolutional codec class
reedsolomon.cpp	Implementation of a Reed-Solomon codec class
reedsolomon.h	Definitions of a Reed-Solomon codec class
sequence.cpp	Implementation of binary sequence classes and functions
sequence.h	Definitions of binary sequence classes and functions
siso.h	Definitions for Soft Input Soft Output (SISO) modules class
siso_dem.cpp	Implementation of SISO modules for demappers
siso_eq.cpp	Implementation of SISO modules for equalizers
siso_mud.cpp	Implementation of SISO modules for descrambler and MUDs
siso_nsc.cpp	Implementation of SISO modules for NSC codes
siso_rsc.cpp	Implementation of SISO modules for RSC codes
spread.cpp	Implementation of spread spectrum classes and functions
spread.h	Definition of spread spectrum classes and functions
stc.cpp	Implementation of Space Time block Codes (STC) class
stc.h	Definitions for Space Time Codes (STC) class
turbo.cpp	Implementation of a turbo encoder/decoder class
turbo.h	Definition of a (punctured) turbo encoder/decoder class
fixed
cfix.cpp	Implementation of a complex fixed-point data type CFix
cfix.h	Definitions of a complex fixed-point data type CFix
cfixed.cpp	Implementation of a complex fixed-point data type CFixed
cfixed.h	Definitions of a complex fixed-point data type CFixed
fix.cpp	Implementation of a fixed-point data type Fix
fix.h	Definitions of a fixed-point data type Fix
fix_base.cpp	Implementation of a base class for fixed-point data types
fix_base.h	Definitions of a base class for fixed-point data types
fix_factory.cpp	Implementation of a class factory for fixed-point data types Fix and CFix
fix_factory.h	Definitions of a class factory for fixed-point data types Fix and CFix
fix_functions.cpp	Implementation of a set of functions for Fix, Fixed, CFix and CFixed classes
fix_functions.h	Definitions of a set of functions for Fix, Fixed, CFix and CFixed classes
fix_operators.cpp	Implementation of a set of operators for Fix, Fixed, CFix and CFixed classes
fix_operators.h	Definitions of a set of operators for Fix, Fixed, CFix and CFixed classes
fixed.cpp	Implementation of a fixed-point data type Fixed
fixed.h	Definitions of a fixed-point data type Fixed
optim
newton_search.cpp	Newton Search optimization algorithms - source file
newton_search.h	Newton Search optimization algorithms - header file
protocol
events.cpp	Implementation of an event-based simulation class
events.h	Definitions of an event-based simulation class
front_drop_queue.cpp	Implementation of a Front Drop Queue class
front_drop_queue.h	Definitions of a Front Drop Queue class
packet.h	Definition of a Packet class
packet_channel.cpp	Implementation of a Packet channel class
packet_channel.h	Definition of a Packet channel class
packet_generator.cpp	Implementation of a Packet generator class
packet_generator.h	Definition of a Packet generator class
selective_repeat.cpp	Implementation of Selective Repeat ARQ classes
selective_repeat.h	Definitions of Selective Repeat ARQ classes
signals_slots.h	Definitions of Signals and Slots classes
tcp.cpp	Implementation of Transport Control Protocol (TCP)
tcp.h	Definition of Transport Control Protocol (TCP)
tcp_client_server.h	Definitions of TCP Client and Server Applications
signal
fastica.cpp	Implementation of FastICA (Independent Component Analysis) for IT++
fastica.h	Definition of FastICA (Independent Component Analysis) for IT++
filter.cpp	Implementation of Filter classes and functions
filter.h	Definitions of Filter classes and functions
filter_design.cpp	Filter design functions
filter_design.h	Filter design functions
freq_filt.cpp	Implementation of Freq_Filt Class
freq_filt.h	Definition of frequency domain filter class
poly.cpp	Polynomial functions
poly.h	Polynomial functions
resampling.cpp	Resampling functions - source file
resampling.h	Resampling functions - header file
sigfun.cpp	Implementation of signal processing functions
sigfun.h	Definitions of signal processing functions
source.cpp	Deterministic sources - source file
source.h	Deterministic sources - header file
transforms.cpp	Fourier, Cosine, Hadamard, Walsh-Hadamard, and 2D Hadamard transforms - source file
transforms.h	Fourier, Hadamard, Walsh-Hadamard, and 2D Hadamard transforms - header file
window.cpp	Implementation of window functions
window.h	Definitions of window functions
srccode
audiofile.cpp	Implementation of audio Audio classes and functions
audiofile.h	Definitions of audio Audio classes and functions
audiosample.h	Encoding and decoding of audio samples
g711.cpp	Implementation of G.711 logarithmic codecs
g711.h	Implementation of G.711 logarithmic codecs
gmm.cpp	Implementation of a Gaussian Mixture Model Class
gmm.h	Definition of a Gaussian Mixture Model Class
lpcfunc.cpp	Implementations of linear prediction functions, and conversion between common representations of linear predictive parameters
lpcfunc.h	Implementation of linear prediction functions, and conversion between common representations of linear predictive parameters
pnm.cpp	Implementation of PNM graphics format I/O function
pnm.h	Definitions of PNM graphics format I/O function
vq.cpp	Implementation of a vector quantizer class (unconstrained)
vq.h	Definition of a vector quantizer class (unconstrained)
vqtrain.cpp	Implementation of a vector quantizer training functions
vqtrain.h	Definitions of a vector quantizer training functions
stat
histogram.h	Histogram class - header file
misc_stat.cpp	Miscellaneous statistics functions and classes - source file
misc_stat.h	Miscellaneous statistics functions and classes - header file
mog_diag.cpp	Diagonal Mixture of Gaussians class - source file
mog_diag.h	Diagonal Mixture of Gaussians class - header file
mog_diag_em.cpp	Expectation Maximisation based optimisers for Mixture of Gaussians - source file
mog_diag_em.h	Expectation Maximisation (EM) based optimisers for MOG - header file
mog_diag_kmeans.cpp	Kmeans based optimiser for Mixture of Gaussians - source file
mog_diag_kmeans.h	K-means based optimiser for Mixture of Gaussians - header file
mog_generic.cpp	Generic Mixture of Gaussians (MOG) class - source file
mog_generic.h	Generic Mixture of Gaussians (MOG) class - header file
itbase.h	Include file for the IT++ base module
itcomm.h	Include file for the IT++ communications module
itfixed.h	Include file for the IT++ fixed-point module
itmex.h	Conversion routines between IT++ and Matlab
itoptim.h	Include file for the IT++ optimization module
itprotocol.h	Include file for the IT++ protocols module
itsignal.h	Include file for the IT++ signal-processing module
itsrccode.h	Include file for the IT++ source coding module
itstat.h	Include file for the IT++ statistics module