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Nowadays, wireless communication technology usually takes the advantage of orthogonal frequency-division multiplexing (OFDM). It becomes Multi-carrier code division multiple access (MC-CDMA) after utilizing spreading code in frequency domain. The chip-level equalizers of MC-CDMA system always equalize data before despreading that enlarge difficulty of hardware compared with that of equalizers in OFDM system. In this paper, we also design an bit-level equalizer which equalizes data after despreading. As a result, the hardware implementation difficulty of the bit-level equalizer may be reduced. Here, we study the performances of the proposed equalizers in the ultra-wideband (UWB) MC-CDMA system for wireless personal area network (WPAN). Simulation results show the performance comparisons of the proposed MC-CDMA equalizers.