Patent ID: 6961352
Filing Date: 2005-11-01
Classification: H04B,H04L

Abstract:
1. A method for synchronizing a radio terminal in a radio-communication network with a received signal flow, said signal flow comprising a predefined synchronization sequence repeated at predefined time intervals in said signal flow, said method comprising the steps of: generating a correlation profile at said radio terminal by correlating a part of said signal flow with said synchronization sequence to reveal correlation peaks indicating the location of said synchronization sequence in said part of signal flow; accumulating as many correlation profiles as necessary, until a threshold level is reached by at least the largest correlation peak, said correlation profiles being obtained with different parts of said signal flow, and updating, during said accumulation, said threshold level depending on a background noise level estimated in said signal flow, wherein said background noise level corresponds to a quantity representative of the energy of the correlation peaks in said already accumulated correlation profile, the energy of the largest peak being excluded from said quantity.