Title :
An OFDM spread spectrum system using lapped transforms and partial band interference suppression
Author :
Saulnier, Gary J. ; Whyte, V. A Alanzo ; Medley, Michael J.
Author_Institution :
Dept. of Electr. Comput. & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
A system that uses orthogonal frequency division multiplexing (OFDM) as a spread spectrum modulation is introduced and its performance is evaluated in the presence of tone interference. Interference excision, in which some of the transform bins are removed in the detection process, is used in the receiver. The BER performance obtained using a number of block transforms is compared to that obtained using the modulated lapped transform (MLT) and it is shown that the MLT provides much better performance due to its ability to confine the interference energy to a few transform bins
Keywords :
error statistics; frequency division multiplexing; interference suppression; modulation; radiofrequency interference; spread spectrum communication; transforms; BER performance; OFDM spread spectrum system; block transforms; detection process; interference energy; interference excision; modulated lapped transform; orthogonal frequency division multiplexing; partial band interference suppression; receiver; spread spectrum modulation; system performance evaluation; tone interference; transform bins; Bit error rate; Discrete Fourier transforms; Discrete cosine transforms; Discrete transforms; Frequency conversion; Interference suppression; Laboratories; OFDM modulation; Spread spectrum communication; Systems engineering and theory;
Conference_Titel :
Digital Signal Processing Workshop Proceedings, 1996., IEEE
Conference_Location :
Loen
Print_ISBN :
0-7803-3629-1
DOI :
10.1109/DSPWS.1996.555475
