Abstract
OFDM (orthogonal frequency division multiplexing) is the high.speed data stream is
divided into many low rate data stream, using a number of orthogonal and overlapped
subcarriers transmitted simultaneously. Its main advantage is low multipath distortion,
resistance to intersymbol interference (ISI) ability, high spectral efficiency.
The performance for theOFDM system on the computer using the Labview simulation
and analysis.The graduation design, I need to do is to master the working principle of OFDM
communication system, realize the OFDM communication system simulation, using
LabVIEW software, including: string and conversion, digital modulation, IFFT, D\/A, RF
modulation, demodulation, channel simulation, A\/D, FFT, digital demodulation, and string
conversion module. Performance analysis of OFDM system design, including the analysis of
bit error rate and peak average ratio analysis.
This thesis consists of four parts: including the history of OFDM and its development
process, the principle and application of OFDM, implementation of OFDM communication
system simulation, using LabVIEW software: string and conversion, digital modulation, IFFT,
D\/A, RF modulation, demodulation, channel simulation, A\/D, FFT, digital demodulation,
and string conversion module and analysis includes the analysis of bit error rate and the
PAPR of OFDM system performance analysis. In the OFDM's history and developing process,
is introduced, the development and application of OFDM. The principle and application of
OFDM, gives a brief description of the principle of the OFDM system, and then
describes in detail the system model includes the principle of OFDM, the system model
consists ofdiscrete system and continuous system model. The three or four part, is the focus of
this paper, for the realization of the various stages of module of the OFDM system, then based
on the data of the results were analyzed and the bit error rate and peak.to.average ratio
analysis concluded.
This paper completed the simulation of the performance of a OFDM system. At the same
time provide useful data for the concrete realization of the system.
