Title :
Time-limited waveforms for OFDM-CDMA in a multipath fading channel
Author :
Drakul, Spase L.
Author_Institution :
Dipt. di Elettronica, Politecnico di Torino, Italy
fDate :
29 Jun-4 Jul 1997
Abstract :
We analyzed the bit error performance of an OFDM-CDMA multicarrier transmission system with waveform shaping. It is shown that such a data shaping decreases the side lobes of the transmitted signal. Classical OFDM systems based on DFT make use of a guard interval in order to improve the performance in multipath fading channels. A part of the loss due to the power transmitted during the guard interval can be compensated efficiently by a waveform shaping which is proposed. The performance of the OFDM-CDMA systems using different shaping waveforms are presented
Keywords :
code division multiple access; coding errors; discrete Fourier transforms; error statistics; fading; frequency division multiplexing; land mobile radio; multipath channels; quadrature amplitude modulation; spread spectrum communication; BER; DFT; OFDM-CDMA; QAM; bit error performance; data shaping; guard interval; mobile radio systems; multicarrier transmission system; multipath fading channel; side lobes; spreading codes; time-limited waveforms; transmitted signal; waveform shaping; Bandwidth; Error analysis; Fading; Multiaccess communication; OFDM; Performance analysis; Performance loss; Prototypes; Pulse modulation; Quadrature amplitude modulation;
Conference_Titel :
Information Theory. 1997. Proceedings., 1997 IEEE International Symposium on
Conference_Location :
Ulm
Print_ISBN :
0-7803-3956-8
DOI :
10.1109/ISIT.1997.613036
