Accurate estimation of the receiver coil sensitivities is critical for an error-free image reconstruction from under-sampled data in SENSE. This work proposes an FPGA (Field Programmable Gate Array) based application specific hardware, for real-time sensitivity maps estimation using pre-scan method. In the proposed work, SENSE reconstructions are performed using the sensitivity maps (computed from the proposed design) and the under-sampled data. The results show that the proposed architecture computes receiver coil sensitivity maps in only 1.466 ms for 8 receiver coils. Also, SENSE reconstructed images show a good mean SNR (30+dB) and low artefact-power (<6×10-4).