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Improved Preamble Detection using B-Spline Filter

In the LTE systems, Random Access is an important aspect of mobile systems where multiple users are always competing for resources. However, channel impairment degrades the detection performance by false detect or miss detect the access requests. The detection performance of access requests solely depends how efficiently we design Rach receiver. This paper proposes a Spline Interpolation based linear filter for suppressing noise rise and interference which improves the preamble detection performance from conventional matched filter approach. Through simulation, we verify that proposed algorithm successfully meets the 3GPP performance requirement by suppressing the noise rise with a detection gain of 2-3dB in low SNR range.