Book Description:
Ofdm simulation using matlab code. Ofdm simulation using matlab code can be extremely handy things, and ofdm simulation using matlab code play an important role in your products. The problem is that once you have gotten your nifty new product, the ofdm simulation using matlab code gets a brief. This example describes a MATLAB implementation of OFDM synchronization, based upon the IEEE 802.11a standard [ 3]. Introduction The IEEE 802.11a standard describes the transmission of an OFDM modulated signal for information exchange between systems in local and metropolitan area networks.
MIMO-OFDM is a key technology for next-generation cellularcommunications (3GPP-LTE, Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n), wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). In MIMO-OFDM Wireless Communications with MATLAB, the authors provide a comprehensive introduction to the theory and practice ofwireless channel modeling, OFDM, and MIMO, using MATLAB programs to simulate the various techniques on MIMO-OFDM systems. One of the only books in the area dedicated to explaining simulation aspects.
![Matlab Matlab](/uploads/1/2/6/4/126430525/355170559.png)
QPSK and OFDM with MATLAB System Objects
This example shows how to simulate a basic communication system in which the signal is first QPSK modulated and then subjected to Orthogonal Frequency Division Multiplexing. The signal is then passed through an additive white Gaussian noise channel prior to being demultiplexed and demodulated. Lastly, the number of bit errors are calculated. The example showcases the use of MATLAB® System objects™.
Set the simulation parameters.
Construct System objects needed for the simulation: QPSK modulator, QPSK demodulator, OFDM modulator, OFDM demodulator, AWGN channel, and an error rate calculator. Use name-value pairs to set the object properties.
Set the QPSK modulator and demodulator so that they accept binary inputs.
Set the OFDM modulator and demodulator pair according to the simulation parameters.
Set the
NoiseMethod
property of the AWGN channel object to Variance
and define the VarianceSource
property so that the noise power can be set from an input port.Set the
ResetInputPort
property to true
to enable the error rate calculator to be reset during the simulation.Use the
info
function of the ofdmMod
object to determine the input and output dimensions of the OFDM modulator.Determine the number of data subcarriers from the
ofdmDims
structure variable.Ofdm Spectrum Matlab
Determine the OFDM frame size (in bits) from the number of data subcarriers and the number of bits per symbol.
Mimo Ofdm Matlab
Set the SNR vector based on the desired Eb/No range, the number of bits per symbol, and the ratio of the number of data subcarriers to the total number of subcarriers.
Ofdm Simulation Using Matlab
Initialize the BER and error statistics arrays.
Simulate the communication link over the range of Eb/No values. For each Eb/No value, the simulation runs until either
maxBitErrors
are recorded or the total number of transmitted bits exceeds maxNumBits
.Use the
berawgn
function to determine the theoretical BER for a QPSK system.Plot the theoretical and simulated data on the same graph to compare results.
Ofdm Simulink
Observe that there is good agreement between the simulated and theoretical data.