Single Supply Class-A-Amplifier circuit to amplify voltage signal alternating around ground
Use an opamp circuit, non-inverting config, with a gain of 30. I. E. R2/R1 = 29

Connect R1 to gnd through a large cap. 

Make a resistive divider across your Vsupply to get midpoint of 1.5v

Connect your signal through sufficiently large cap to non-inverting pin. 

Connect resistive divider centre point also to inverting terminal through large resistor (say 1Meg) 

That's your circuit. 

Choice of opamp and of caps depends on your pulse width and spacing etc etc. Also opamp power supply should be properly selected for opamp chosen.