Title :
Performance of the COFDM systems with waveform shaping
Author :
Benedetto, Valter ; D´aria, Giovanna ; Scarabosio, Luca ; Drakul, Spase L.
Author_Institution :
CSELT, Torino, Italy
Abstract :
This paper explains the advantages of using a method for waveform shaping in COFDM. It is shown that such data shaping decreases the side lobes of the transmitted signal and minimizes the need for a guard band between OFDM systems. 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 the waveform shaping which is proposed. In the presence of both AWGN and multipath fading the bit error performance of the proposed system and the classical COFDM systems are compared. Digital video broadcasting is used as an example
Keywords :
Gaussian channels; digital television; discrete Fourier transforms; error statistics; fading; frequency division multiplexing; interference suppression; multipath channels; radiofrequency interference; television broadcasting; television interference; AWGN; COFDM systems; DFT; bit error performance; data shaping; digital video broadcasting; guard band; guard interval; loss; multipath fading; multipath fading channels; performance; power transmitted; side lobes; transmitted signal; waveform shaping; Digital audio broadcasting; Digital video broadcasting; Discrete Fourier transforms; Fading; OFDM modulation; Pulse modulation; Pulse shaping methods; Quadrature amplitude modulation; Quadrature phase shift keying; Shape;
Conference_Titel :
Communications, 1997. ICC '97 Montreal, Towards the Knowledge Millennium. 1997 IEEE International Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3925-8
DOI :
10.1109/ICC.1997.594989
