A delay-robust random access preamble detection algorithm for LTE system

The Zadoff-Chu sequence-based random access preamble adopted in LTE system supports the convenient detection of preamble ID and propagation delay due to the superb correlation properties, and the conventional preamble detection algorithm is simple and well-performing by using these properties. However the performance is strictly limited by the presence of large propagation delay. This paper gives the enhanced scheme of the conventional algorithm in order to overcome the limitation of propagation delay. Simulation results indicate that the proposed preamble detection algorithm is able to estimate exact ID and delay information with presence of the large propagation delay with 18.5% complexity increment. The proposed algorithm is implemented in C64x TI-DSP core, and satisfying real-time operation condition.