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Functions in Communications System Toolbox

  • By Category | Alphabetical List
  • Communications Modeling

    Input and Output

    comm.BarkerCode Generate Barker code
    comm.GoldSequence Generate Gold sequence
    comm.HadamardCode Generate Hadamard code
    comm.KasamiSequence Generate Kasami sequence
    comm.WalshCode Generate Walsh code from orthogonal set of codes
    comm.PNSequence Generate a pseudo-noise (PN) sequence
    commsrc.pattern Construct pattern generator object
    commsrc.pn Create PN sequence generator package
    lteZadoffChuSeq Generate root Zadoff-Chu sequence of complex symbols
    mask2shift Convert mask vector to shift for shift register configuration
    randerr Generate bit error patterns
    randsrc Generate random matrix using prescribed alphabet
    shift2mask Convert shift to mask vector for shift register configuration
    wgn Generate white Gaussian noise

    Signal and Delay Management

    bi2de Convert binary vectors to decimal numbers
    de2bi Convert decimal numbers to binary vectors
    bin2gray Convert positive integers into corresponding Gray-encoded integers
    gray2bin Convert Gray-encoded positive integers to corresponding Gray-decoded integers
    alignsignals Align two signals by delaying earliest signal
    finddelay Estimate delay(s) between signals
    vec2mat Convert vector into matrix

    Display and Visual Analysis

    comm.ConstellationDiagram Display a constellation diagram for input signals
    dsp.ArrayPlot Display vectors or arrays
    dsp.SpectrumAnalyzer Display frequency spectrum of time-domain signals
    dsp.TimeScope Time domain signal display
    bertool Open bit error rate analysis GUI (BERTool)
    commscope Package of communications scope classes
    commscope.eyediagram Eye diagram analysis
    commscope.ScatterPlot Create Scatter Plot scope
    eyediagram Generate eye diagram
    EyeScope Launch eye diagram scope for eye diagram object H
    scatterplot Generate scatter plot

    System Design

    Source Coding

    comm.DifferentialDecoder Decode binary signal using differential decoding
    comm.DifferentialEncoder Encode binary signal using differential coding
    arithdeco Decode binary code using arithmetic decoding
    arithenco Encode sequence of symbols using arithmetic coding
    compand Source code mu-law or A-law compressor or expander
    dpcmdeco Decode using differential pulse code modulation
    dpcmenco Encode using differential pulse code modulation
    dpcmopt Optimize differential pulse code modulation parameters
    huffmandeco Huffman decoder
    huffmandict Generate Huffman code dictionary for source with known probability model
    huffmanenco Huffman encoder
    lloyds Optimize quantization parameters using Lloyd algorithm
    quantiz Produce quantization index and quantized output value

    Error Detection and Correction

    Cyclic Redundancy Check Coding

    comm.CRCDetector Detect errors in input data using CRC
    comm.CRCGenerator Generate CRC code bits and append to input data
    comm.HDLCRCDetector Detect errors in input data using HDL-optimized CRC
    comm.HDLCRCGenerator Generate HDL-optimized CRC code bits and append to input data

    Block Coding

    Linear Block Codes
    cyclgen Produce parity-check and generator matrices for cyclic code
    cyclpoly Produce generator polynomials for cyclic code
    decode Block decoder
    encode Block encoder
    gfweight Calculate minimum distance of linear block code
    gen2par Convert between parity-check and generator matrices
    syndtable Produce syndrome decoding table
    Hamming Codes
    decode Block decoder
    encode Block encoder
    gen2par Convert between parity-check and generator matrices
    hammgen Produce parity-check and generator matrices for Hamming code
    syndtable Produce syndrome decoding table
    BCH Codes
    comm.BCHDecoder Decode data using BCH decoder
    comm.BCHEncoder Encode data using BCH encoder
    bchdec BCH decoder
    bchenc BCH encoder
    bchgenpoly Generator polynomial of BCH code
    bchnumerr Number of correctable errors for BCH code
    Reed-Solomon Codes
    comm.RSDecoder Decode data using Reed-Solomon decoder
    comm.RSEncoder Encode data using Reed-Solomon encoder
    comm.HDLRSDecoder Decode data using a Reed-Solomon decoder
    comm.HDLRSEncoder Encode data using a Reed-Solomon encoder
    rsdec Reed-Solomon decoder
    rsenc Reed-Solomon encoder
    rsgenpoly Generator polynomial of Reed-Solomon code
    rsgenpolycoeffs Generator polynomial coefficients of Reed-Solomon code
    LDPC Codes
    comm.LDPCDecoder Decode binary low-density parity-check code
    comm.gpu.LDPCDecoder Decode binary low-density parity-check data with GPU
    comm.LDPCEncoder Encode binary low-density parity-check code
    dvbs2ldpc Low-density parity-check codes from DVB-S.2 standard

    Convolutional Coding

    comm.APPDecoder Decode convolutional code using the a posteriori probability method
    comm.ConvolutionalEncoder Convolutionally encode binary data
    comm.gpu.ConvolutionalEncoder Convolutionally encode binary data with GPU
    comm.TurboDecoder Decode input signal using parallel concatenated decoding scheme
    comm.gpu.TurboDecoder Decode input signal using parallel concatenation decoding with GPU
    comm.TurboEncoder Encode input signal using parallel concatenated encoding scheme
    comm.ViterbiDecoder Decode convolutionally encoded data using Viterbi algorithm
    comm.gpu.ViterbiDecoder Decode convolutionally encoded data using Viterbi algorithm with GPU
    iscatastrophic True for trellis corresponding to catastrophic convolutional code
    istrellis True for valid trellis structure
    oct2dec Convert octal to decimal numbers
    poly2trellis Convert convolutional code polynomials to trellis description
    vitdec Convolutionally decode binary data using Viterbi algorithm

    Galois Field Computations

    convmtx Convolution matrix of Galois field vector
    cosets Produce cyclotomic cosets for Galois field
    dftmtx Discrete Fourier transform matrix in Galois field
    fft Discrete Fourier transform
    filter (gf) 1-D digital filter over Galois field
    gf Create Galois field array
    gftable Generate file to accelerate Galois field computations
    ifft Inverse discrete Fourier transform
    isprimitive True for primitive polynomial for Galois field
    log Logarithm in Galois field
    minpol Find minimal polynomial of Galois field element
    mldivide Matrix left division \ of Galois arrays
    primpoly Find primitive polynomials for Galois field

    Galois Fields of Odd Characteristic

    gfadd Add polynomials over Galois field
    gfconv Multiply polynomials over Galois field
    gfcosets Produce cyclotomic cosets for Galois field
    gfdeconv Divide polynomials over Galois field
    gfdiv Divide elements of Galois field
    gffilter Filter data using polynomials over prime Galois field
    gflineq Find particular solution of Ax = b over prime Galois field
    gfminpol Find minimal polynomial of Galois field element
    gfmul Multiply elements of Galois field
    gfpretty Polynomial in traditional format
    gfprimck Check whether polynomial over Galois field is primitive
    gfprimdf Provide default primitive polynomials for Galois field
    gfprimfd Find primitive polynomials for Galois field
    gfrank Compute rank of matrix over Galois field
    gfrepcov Convert one binary polynomial representation to another
    gfroots Find roots of polynomial over prime Galois field
    gfsub Subtract polynomials over Galois field
    gftrunc Minimize length of polynomial representation
    gftuple Simplify or convert Galois field element formatting

    Signal Operations

    comm.Descrambler Descramble input signal
    comm.Scrambler Scramble input signal

    Interleaving

    comm.AlgebraicDeinterleaver Deinterleave input symbols using algebraically derived permutation vector
    comm.AlgebraicInterleaver Permute input symbols using algebraically derived permutation vector
    comm.BlockDeinterleaver Deinterleave input symbols using permutation vector
    comm.gpu.BlockDeinterleaver Restore original ordering of block interleaved sequence with GPU
    comm.BlockInterleaver Permute input symbols using permutation vector
    comm.gpu.BlockInterleaver Create block interleaved sequence with GPU
    comm.MatrixDeinterleaver Deinterleave input symbols using permutation matrix
    comm.MatrixHelicalScanDeinterleaver Deinterleave input symbols by filling a matrix along diagonals
    comm.MatrixHelicalScanInterleaver Permute input symbols by selecting matrix elements along diagonals
    comm.MatrixInterleaver Permute input symbols using permutation matrix
    comm.ConvolutionalDeinterleaver Restore ordering of symbols using shift registers
    comm.gpu.ConvolutionalDeinterleaver Restore ordering of symbols using shift registers with GPU
    comm.ConvolutionalInterleaver Permute input symbols using shift registers with same property values
    comm.gpu.ConvolutionalInterleaver Permute input symbols using shift registers with GPU
    comm.HelicalDeinterleaver Restore ordering of symbols using helical array
    comm.HelicalInterleaver Permute input symbols using helical array
    comm.MultiplexedDeinterleaver Deinterleave input symbols using set of shift registers with specified delays
    comm.MultiplexedInterleaver Permute input symbols using set of shift registers with specified delays
    algdeintrlv Restore ordering of symbols using algebraically derived permutation table
    algintrlv Reorder symbols using algebraically derived permutation table
    convdeintrlv Restore ordering of symbols using shift registers
    convenc Convolutionally encode binary data
    convintrlv Permute symbols using shift registers
    deintrlv Restore ordering of symbols
    heldeintrlv Restore ordering of symbols permuted using helintrlv
    helintrlv Permute symbols using helical array
    helscandeintrlv Restore ordering of symbols in helical pattern
    helscanintrlv Reorder symbols in helical pattern
    matdeintrlv Restore ordering of symbols by filling matrix by columns and emptying it by rows
    matintrlv Reorder symbols by filling matrix by rows and emptying it by columns
    muxdeintrlv Restore ordering of symbols using specified shift registers
    muxintrlv Permute symbols using shift registers with specified delays
    randdeintrlv Restore ordering of symbols using random permutation
    randintrlv Reorder symbols using random permutation

    Digital Baseband Modulation

    FM Modulation

    comm.FSKDemodulator Demodulate using M-ary FSK method
    comm.FSKModulator Modulate using M-ary FSK method
    bin2gray Convert positive integers into corresponding Gray-encoded integers
    gray2bin Convert Gray-encoded positive integers to corresponding Gray-decoded integers
    fskdemod Frequency shift keying demodulation
    fskmod Frequency shift keying modulation

    PM Modulation

    comm.BPSKDemodulator Demodulate using BPSK method
    comm.BPSKModulator Modulate using BPSK method
    comm.DBPSKDemodulator Demodulate using DBPSK method
    comm.DBPSKModulator Modulate using DBPSK method
    comm.DPSKDemodulator Demodulate using M-ary DPSK method
    comm.DPSKModulator Modulate using M-ary DPSK method
    comm.DQPSKDemodulator Demodulate using DQPSK method
    comm.DQPSKModulator Modulate using DQPSK method
    comm.OQPSKDemodulator Demodulate using OQPSK method
    comm.OQPSKModulator Modulate using OQPSK method
    comm.PSKDemodulator Demodulate using M-ary PSK method
    comm.gpu.PSKDemodulator Demodulate using M-ary PSK method with GPU
    comm.PSKModulator Modulate using M-ary PSK method
    comm.gpu.PSKModulator Modulate using M-ary PSK method with GPU
    comm.QPSKDemodulator Demodulate using QPSK method
    comm.QPSKModulator Modulate using QPSK method
    dpskdemod Differential phase shift keying demodulation
    dpskmod Differential phase shift keying modulation
    modnorm Scaling factor for normalizing modulation output
    oqpskdemod Offset quadrature phase shift keying demodulation
    oqpskmod Offset quadrature phase shift keying modulation
    pskdemod Phase shift keying demodulation
    pskmod Phase shift keying modulation
    bin2gray Convert positive integers into corresponding Gray-encoded integers
    gray2bin Convert Gray-encoded positive integers to corresponding Gray-decoded integers

    AM Modulation

    comm.GeneralQAMDemodulator Demodulate using arbitrary QAM constellation
    comm.GeneralQAMModulator Modulate using arbitrary QAM constellation
    comm.PAMDemodulator Demodulate using M-ary PAM method
    comm.PAMModulator Modulate using M-ary PAM method
    comm.RectangularQAMDemodulator Demodulate using rectangular QAM signal constellation
    comm.RectangularQAMModulator Modulate using rectangular QAM signal constellation
    genqamdemod General quadrature amplitude demodulation
    genqammod General quadrature amplitude modulation
    pamdemod Pulse amplitude demodulation
    pammod Pulse amplitude modulation
    qamdemod Quadrature amplitude demodulation
    qammod Quadrature amplitude modulation
    gray2bin Convert Gray-encoded positive integers to corresponding Gray-decoded integers
    bin2gray Convert positive integers into corresponding Gray-encoded integers

    CPM Modulation

    comm.CPFSKDemodulator Demodulate using CPFSK method and Viterbi algorithm
    comm.CPFSKModulator Modulate using CPFSK method
    comm.CPMDemodulator Demodulate using CPM method and Viterbi algorithm
    comm.CPMModulator Modulate using CPM method
    comm.GMSKDemodulator Demodulate using GMSK method and the Viterbi algorithm
    comm.GMSKModulator Modulate using GMSK method
    comm.MSKDemodulator Demodulate using MSK method and the Viterbi algorithm
    comm.MSKModulator Modulate using MSK method
    bin2gray Convert positive integers into corresponding Gray-encoded integers
    gray2bin Convert Gray-encoded positive integers to corresponding Gray-decoded integers

    TCM Modulation

    comm.GeneralQAMTCMDemodulator Demodulate convolutionally encoded data mapped to arbitrary QAM constellation
    comm.GeneralQAMTCMModulator Convolutionally encode binary data and map using arbitrary QAM constellation
    comm.PSKTCMDemodulator Demodulate convolutionally encoded data mapped to M-ary PSK signal constellation
    comm.PSKTCMModulator Convolutionally encode binary data and map using M-ary PSK signal constellation
    comm.RectangularQAMTCMDemodulator Demodulate convolutionally encoded data mapped to rectangular QAM signal constellation
    comm.RectangularQAMTCMModulator Convolutionally encode binary data and map using rectangular QAM signal constellation
    bin2gray Convert positive integers into corresponding Gray-encoded integers
    gray2bin Convert Gray-encoded positive integers to corresponding Gray-decoded integers

    OFDM Modulation

    comm.OFDMDemodulator Demodulate using OFDM method
    comm.OFDMModulator Modulate using OFDM method

    Analog Passband Modulation

    amdemod Amplitude demodulation
    ammod Amplitude modulation
    fmdemod Frequency demodulation
    fmmod Frequency modulation
    pmdemod Phase demodulation
    pmmod Phase modulation
    ssbdemod Single sideband amplitude demodulation
    ssbmod Single sideband amplitude modulation

    Filtering

    comm.IntegrateAndDumpFilter Integrate discrete-time signal with periodic resets
    comm.RaisedCosineReceiveFilter Decimate using raised cosine filter
    comm.RaisedCosineTransmitFilter Interpolate using raised cosine filter
    gaussdesign Gaussian FIR pulse-shaping filter design
    intdump Integrate and dump
    intrlv Reorder sequence of symbols
    rcosdesign Raised cosine FIR pulse-shaping filter design
    rectpulse Rectangular pulse shaping

    Synchronization

    Carrier Phase Synchronization

    comm.CPMCarrierPhaseSynchronizer Recover carrier phase of baseband CPM signal
    comm.PSKCarrierPhaseSynchronizer Recover carrier phase of baseband PSK signal

    Timing Phase Synchronization

    comm.EarlyLateGateTimingSynchronizer Recover symbol timing phase using early-late gate method
    comm.GardnerTimingSynchronizer Recover symbol timing phase using Gardner's method
    comm.GMSKTimingSynchronizer Recover symbol timing phase using fourth-order nonlinearity method
    comm.MSKTimingSynchronizer Recover symbol timing phase using fourth-order nonlinearity method
    comm.MuellerMullerTimingSynchronizer Recover symbol timing phase using Mueller-Muller method

    Synchronization Utilities

    comm.DiscreteTimeVCO Generate variable frequency sinusoid

    Equalization

    comm.MLSEEqualizer Equalize using maximum likelihood sequence estimation
    cma Construct constant modulus algorithm (CMA) object
    dfe Construct decision-feedback equalizer object
    equalize Equalize signal using equalizer object
    lineareq Construct linear equalizer object
    lms Construct least mean square (LMS) adaptive algorithm object
    mlseeq Equalize linearly modulated signal using Viterbi algorithm
    normlms Construct normalized least mean square (LMS) adaptive algorithm object
    reset (equalizer) Reset equalizer object
    rls Construct recursive least squares (RLS) adaptive algorithm object
    signlms Construct signed least mean square (LMS) adaptive algorithm object
    varlms Construct variable-step-size least mean square (LMS) adaptive algorithm object

    Multiple-Input Multiple-Output (MIMO)

    comm.LTEMIMOChannel Filter input signal through LTE MIMO multipath fading channel
    comm.MIMOChannel Filter input signal through MIMO multipath fading channel
    comm.OSTBCCombiner Combine inputs using orthogonal space-time block code
    comm.OSTBCEncoder Encode input using orthogonal space-time block code
    comm.SphereDecoder Decode input using sphere decoder

    Channel Modeling and RF Impairments

    comm.AGC Adaptively adjust gain for constant signal-level output
    comm.AWGNChannel Add white Gaussian noise to input signal
    comm.gpu.AWGNChannel Add white Gaussian noise to input signal with GPU
    comm.BinarySymmetricChannel Introduce binary errors
    comm.LTEMIMOChannel Filter input signal through LTE MIMO multipath fading channel
    comm.MemorylessNonlinearity Apply memoryless nonlinearity to input signal
    comm.MIMOChannel Filter input signal through MIMO multipath fading channel
    comm.PhaseFrequencyOffset Apply phase and frequency offsets to input signal
    comm.PhaseNoise Apply phase noise to complex, baseband signal
    comm.RayleighChannel Filter input signal through a Rayleigh multipath fading channel
    comm.RicianChannel Filter input signal through a Rician fading channel
    comm.ThermalNoise Add receiver thermal noise
    comm.PSKCoarseFrequencyEstimator Estimate frequency offset for PSK signal
    comm.QAMCoarseFrequencyEstimator Estimate frequency offset for QAM signal
    awgn Add white Gaussian noise to signal
    bsc Model binary symmetric channel
    doppler Construct Doppler spectrum structure
    doppler.ajakes Construct asymmetrical Doppler spectrum object
    doppler.bell Construct bell-shaped Doppler spectrum object
    doppler.bigaussian Construct bi-Gaussian Doppler spectrum object
    doppler.flat Construct flat Doppler spectrum object
    doppler.gaussian Construct Gaussian Doppler spectrum object
    doppler.jakes Construct Jakes Doppler spectrum object
    doppler.rjakes Construct restricted Jakes Doppler spectrum object
    doppler.rounded Construct rounded Doppler spectrum object
    filter Filter signal with channel object
    legacychannelsim Toggles random number generation mode for channel objects
    plot (channel) Plot channel characteristics with channel visualization tool
    rayleighchan Construct Rayleigh fading channel object
    reset Reset channel object
    ricianchan Construct Rician fading channel object
    stdchan Construct channel object from set of standardized channel models

    Measurements and Analysis

    comm.ACPR Adjacent Channel Power Ratio measurements
    comm.CCDF Measure complementary cumulative distribution function
    comm.ErrorRate Compute bit or symbol error rate of input data
    comm.EVM Measure error vector magnitude
    comm.MER Measure modulation error ratio
    berawgn Bit error rate (BER) for uncoded AWGN channels
    bercoding Bit error rate (BER) for coded AWGN channels
    berconfint Bit error rate (BER) and confidence interval of Monte Carlo simulation
    berfading Bit error rate (BER) for Rayleigh and Rician fading channels
    berfit Fit curve to nonsmooth empirical bit error rate (BER) data
    bersync Bit error rate (BER) for imperfect synchronization
    biterr Compute number of bit errors and bit error rate (BER)
    commtest.ErrorRate Create error rate test console
    distspec Compute distance spectrum of convolutional code
    noisebw Equivalent noise bandwidth of filter
    semianalytic Calculate bit error rate (BER) using semianalytic technique
    marcumq Generalized Marcum Q function
    qfunc Q function
    qfuncinv Inverse Q function
    symerr Compute number of symbol errors and symbol error rate

    Simulation Acceleration Using GPUs

    comm.gpu.AWGNChannel Add white Gaussian noise to input signal with GPU
    comm.gpu.BlockDeinterleaver Restore original ordering of block interleaved sequence with GPU
    comm.gpu.BlockInterleaver Create block interleaved sequence with GPU
    comm.gpu.ConvolutionalDeinterleaver Restore ordering of symbols using shift registers with GPU
    comm.gpu.ConvolutionalEncoder Convolutionally encode binary data with GPU
    comm.gpu.ConvolutionalInterleaver Permute input symbols using shift registers with GPU
    comm.gpu.LDPCDecoder Decode binary low-density parity-check data with GPU
    comm.gpu.PSKDemodulator Demodulate using M-ary PSK method with GPU
    comm.gpu.PSKModulator Modulate using M-ary PSK method with GPU
    comm.gpu.TurboDecoder Decode input signal using parallel concatenation decoding with GPU
    comm.gpu.ViterbiDecoder Decode convolutionally encoded data using Viterbi algorithm with GPU

    Software-Defined Radio Interfaces

    Support Package for RTL-SDR Radio

    sdrexamples Open index to featured examples for all SDR support packages
    sdrinfo Report information about attached radios
    sdrrroot Report root folder for RTL-SDR radio support package installation
    sdrsetup Set up MATLAB to work with radios and third-party tools
    supportPackageInstaller Find and install support for third-party hardware or software
    comm.RTLSDRReceiver Receive data from RTL-SDR radio

    Support Package for Xilinx FPGA-Based Radio

    sdrexamples Open index to featured examples for all SDR support packages
    sdrinfo Report information about attached radios
    sdrload Load FPGA and firmware images onto radio
    sdrsetup Set up MATLAB to work with radios and third-party tools
    sdrfgensysace Generate SystemACE image for specified bitstream
    sdrfroot Report root folder for support package installation
    supportPackageInstaller Find and install support for third-party hardware or software
    comm.SDRADIFMCOMMSReceiver Receive data from Analog Devices FMCOMMS board
    comm.SDRADIFMCOMMSTransmitter Transmit data to Analog Devices FMCOMMS board
    comm.SDREpiqBitsharkReceiver Receive data from Epiq Solution's Bitshark RF board
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