An Acquisition Method Using a Code-Orthogonalizing Filter in UWB-IR Multiple Access

This paper proposes an acquisition method using a code-orthogonalizing filter (COF) in an ultra wideband-impulse radio (UWB-IR) multiple access communication system with time hopping/spread spectrum (TH/SS). In the COF of this system, the particular template signal of the TH system is adopted. By using a COF, multiple access interferences are suppressed, and orthogonalization of an own-sequence is achieved. Then, calculating the correlation between the coefficients of a COF and the own-sequence of in-phase, the synchronous phase can be obtained. It is shown that the proposed method can be superior to the conventional sliding correlator when the number of users increases