【摘要】 无人机活塞发动机工作时将产生很强的电磁干扰,如果遥控接收机不采取干扰抑制措施将严重影响正常的通信。通过分析发动机火花塞电磁干扰产生的机理,提出了一种宽带抑制电磁干扰的接收机实现方案,通过缩短信道脉冲响应长度及自适应限幅等措施降低火花塞电磁干扰在时域上的扩展,从而将发动机火花塞产生的电磁干扰影响局限在较短的时间内,并大幅降低干扰能量。仿真和试验表明,可有效降低火花塞电磁干扰对数据解调的影响。更多还原

【Abstract】 The electromagnetic interference caused by piston engine spark in UAV would badly affect the receiver’s performance if the receiver does not take measure to suppress the interference.Based on mechanism analysis of the spark interference,a method for suppressing EMI(Electromagnetic Interference) is proposed,which suppresses the EMI through receiver’s bandwidth.The time spread of EMI is reduced through shortening channel impulse response length and by adaptive amplitude limiting,thus restraining EMI caused by piston engine spark in a fairly short time while greatly reducing the interference energy.Simulations and experiments show that the effect of piston engine spark on data demodulation is effectively reduced.更多还原