mimo::EqualizerMMSE Class Reference

MMSE Equalizer, i.e. Matrix inversion and multiplication block, i.e. the solution of a linear equation system. More...

#include <equalizer.h>

Inheritance diagram for mimo::EqualizerMMSE:

[legend]List of all members.

Public Member Functions
	EqualizerMMSE (int deviceID, DeviceSystemIntf *system, const simth::PropertyList &pl, size_t nr_rx, size_t nr_tx, const std::string &loopVar)
	EqualizerMMSE (int deviceID, DeviceSystemIntf *system, const simth::PropertyList &pl)
void	setSNR (double snr)
void	setNoisePower (double n)
void	process ()
Static Public Member Functions
static void	calcMMSE (const CVectorSeq &received_signal, const MatrixFreqSignal &channelestim, CVectorSeq &equalized_signal, double noise_power, CVectorSeq *softout_information)
Related Functions
(Note that these are not member functions.)
	propertylist_EqualizerMMSE (not_a_function)

---

Detailed Description

MMSE Equalizer, i.e. Matrix inversion and multiplication block, i.e. the solution of a linear equation system.

FIXME: Need to check whether this is already implemented in the SpatialMuxDecoder

Only works for matrices at input_port 1 and vectors at input_port 0. The matrix A is of dimension MxN, the input vector b of dimension N, and the output vector x of dimension M. If M=N, the solution is, well, the solution of Ax=b. If M>N, the solution will be the linear least square that minimizes ||Ax-b||^2 using QR factorization.

Parameters in Micos parameter file:

eq_type: set this to "<code>zf</code>"

nr_rx: Set this to the length M of the input vector.

nr_tx: Set this to the length M of the output vector.

snr: Set this to the loop variable that specifies the SNR.

---

Constructor & Destructor Documentation

mimo::EqualizerMMSE::EqualizerMMSE (  int  deviceID, DeviceSystemIntf *  system, const simth::PropertyList &  pl, size_t  nr_rx, size_t  nr_tx, const std::string &  loopVar )

mimo::EqualizerMMSE::EqualizerMMSE (  int  deviceID, DeviceSystemIntf *  system, const simth::PropertyList &  pl )

---

Member Function Documentation

void mimo::EqualizerMMSE::setSNR (  double  snr  )

Sets the signal-to-noise ratio to 'snr', while the signal power is kept constant.

void mimo::EqualizerMMSE::setNoisePower (  double  n  )

void mimo::EqualizerMMSE::process (   )  [virtual]

Implements simth::Device.

static void mimo::EqualizerMMSE::calcMMSE (  const CVectorSeq &  received_signal, const MatrixFreqSignal &  channelestim, CVectorSeq &  equalized_signal, double  noise_power, CVectorSeq *  softout_information )  [static]

---

Friends And Related Function Documentation

propertylist_EqualizerMMSE (  not_a_function   )  [related]

These are the properties of class EqualizerMMSE . This list is auto-generated from the XML-Devicelist of this device by means of an XSLT transformation script. Description of this device in the XML file: MMSE Equalizer Note that this class also has the Properties of its base classes. The direct base class is mimo::Equalizer ; direct link to its propertylist should be propertylist_Equalizer(). The list below usually includes the properties that have been inherited from the base classes; the properties which belong only to this class can be found at the end of this list. nr_rx <unsigned>, default "" -- Number of receive antennas. nr_tx <unsigned>, default "" -- Number of transmit antennas. 2 properties in this class. The above properties have been inherited from the base class mimo::Equalizer . snr <string>, default "" -- Name of the SNR loop variable 1 properties in this class.

---