Implementation of multicarrier modulation using FPGA

OData support
Supervisor:
Dr. Kollár Zsolt
Department of Broadband Infocommunications and Electromagnetic Theory

The OFDM (Orthogonal Frequency Division Multiplexing) is one of the most common

multicarrier modulation schemes nowadays. The DVB-T standard is based on this mo-

dulation as well. While modulating, the signal will be constructed in the baseband, then

it will be transmitted after a converting it to the passband.

With the spreading of the cognitive radios, the FBMC (Filterbank Multicarrier) mo-

dulation scheme will come into view. A great advantage of the lterbank is, that the signal

has a more ecient spectrum than the OFDM signal. It has a low ACLR (Adjacent Chan-

nel Leakage Ratio), so it doesn’t disturb the adjacent channels. There are two ways to

implement FBMC modulation: one with an extended IFFT, the other, computationally

more ecient way: with a polyphase decomposition of the lterbank. With the use of

FPGA (Field Programmable Gate Array) one can design a fully parallel structure. With

this method, a real time polyphase lterbank implementation for FBMC modulation can

be realised.

Downloads

Please sign in to download the files of this thesis.