Performance analysis of Multi Carrier CDMA System with DCT-OFDM
نویسندگان
چکیده
In this paper, a precise method for calculating the bit-error rate (BER) of a discrete cosine transform (DCT)-based orthogonal frequency-division multiplexing (OFDM) system on additive white Gaussian noise (AWGN) channels for a Multicarrier-CDMA (MCCDMA) is derived and its BER performance will be compared with the FFT based MC-CDMA. These accurate results are used to examine and compare the BER performance of a DCT-MC-CDMA system and the conventional Fast Fourier transform (FFT)-based MCCDMA system in an AWGN environment. Some signaling formats, such as phase-shift keying (PSK),binary phase-shift keying(BPSK), Quadrature Phase shift keying(QPSK) and 16-ary quadrature amplitude modulation (QAM), Differential Phase Shift Keying(DPSK) modulation are considered. As DCT requires less computation than FFT we can reduce MC-CDMA design complexity by exploiting DCT characteristics.
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