the advantages and luck of multi-carrier (MC) modulation on one aspect and the pliability provided via the unfold spectrum (SS) procedure at the different aspect have influenced many researchers to enquire the combo of either recommendations on the grounds that 1993. this mix often called multi-carrier unfold spectrum (MC-SS) merits from the benefits of either platforms and gives excessive flexibility, excessive spectral potency, basic detection suggestions, narrow-band interference rejection power, and so on. the fundamental precept of this mix is easy: The spreading is played as direct series unfold spectrum (DS-SS) yet rather than transmitting the chips over a unmarried provider, numerous sub-carriers are hired. The MC modulation and demodulation can simply be learned within the electronic area via acting IFFT and FFT operations. The separation of the clients’ indications may be played within the code area. MC-SS structures can practice the spreading in frequency path, which permits for easy sign detection suggestions. for the reason that 1993, MC-SS has been deeply studied and new replacement options were proposed. in the meantime, deep procedure research and comparability with DS-CDMA were played that exhibit the prevalence of MC-CDMA. the purpose of Multi-Carrier Spread-Spectrum is to edit the ensemble of the latest contributions and learn leads to this new box which were awarded through the fifth overseas Workshop on Multi-Carrier Spread-Spectrum (MC-SS 2005), held in Oberpfaffenhofen, Germany.