Abstract : The SC-FDMA " Single-Carrier Frequency Division Multiple Access ", is a multiple access scheme, allowing efficient communication resources allocation to multiple mobile terminals. This technique aroused particular interest during the 3GPP LTE " Long Term Evolution "standard specifications. The reconsideration of this technique is related to the low amplitude variation of the generated temporal signal, which is characterized by a low PAPR " Peak to Average Power Ratio ". This major advantage makes possible a use of power amplifier system in the area near the compression point, thus maximizing performance avoiding any distortions. Thus, this system was adopted in the new standard of 3GPP LTE as multiple access scheme for uplink communication. However, in the 3GPP LTE specifications, one symbol over seven is systematically reserved for channel estimation on all sub-carriers that occurs to the system useful throughput decreasing. The objective of this thesis is to propose some estimation and equalization techniques adapted for SC-FDMA system to avoid the loss of the useful throughput. We have investigated, some equalization techniques such as one based on ghosts references, but also some estimation techniques as one based on " Added Signal "in the useful signal bandwidth.