说明：  (1)请设计一种具体的导引辅助的信道估计方法，用Simulink进行仿真，测量BPSK调制时的误码率性能。画出比特信噪比与信道估计均方误差的关系曲线，画出比特信噪比与误码率的关系曲线。
((1) Please design a specific guidance-assisted channel estimation method and simulate it with Simulink to measure the BER performance of BPSK modulation. The relationship curve between bit signal-to-noise ratio and mean square error of channel estimation is drawn, and the relationship curve between bit signal-to-noise ratio and bit error rate is drawn.)