Fig. 1. Logic block diagram of FIR filter

Fig. 2. (a) Process of quantizing h_s[n], (b) Schematic diagram of quantized Gaussian pulse shaping impulse response signal ĥ_s[n]

Fig. 3. Comparison of h_s[n] before and after quantization (a), shaped pulse (b) and frequency-domain characteristics (c) of GPS under different quantization accuracies (color online)

Fig. 4. Shaped pulses (a~c) and amplitude-frequency characteristics (d~f) of GPS under different additional truncation parameters (a, d) Δn_l=Δn, Δn_r=0; (b, e) Δn_l=0, Δn_r=Δn; (c, f) Δn_l=Δn, Δn_r=Δn

Fig. 5. Shaped pulses for different values of Δn_r at Δn_l =33

Fig. 6. Shaping pulse (a~c) and amplitude-frequency characteristics (d~f) of truncated GPS and normal GPS with different peaking times

Fig. 7. Block diagram of digital multichannel analyzer architecture

Fig. 8. Energy spectra of Gaussian pulse shaping at the peaking time of 780 ns with different quantization accuracies

Fig. 9. Peak area (a) and energy resolution (b) of the Mn K_α peak of GPS with different quantization accuracies

Fig. 10. Peak area (a) and energy resolution (b) of the Mn K_α peak of three shaping methods with different peaking times