Cooperative spectrum sensing under LMMSE channel estimation

In cooperative spectrum sensing, the detection performance is affected seriously by the error of channel estimation. Hence, the accurate channel estimation is very necessary. In this paper, the performance of cooperative spectrum sensing under the LMMSE channel estimation method with time-domain windowing technique is analyzed. Simulation results show that the probability of detection can reach high accuracy by this channel estimation method. Given the 1^st hop E_b/N₀ = 20dB and the 2^nd hop E_b/N₀ = 15dB in AF relay channel, the error of detection between the proposed estimation and the perfect estimation is 0.0059, and actual false alarm just deviates the system requirement 1.16%.