Effect of a root-raised-cosine filter on a BPSK stochastic resonance receiver

Abstract

Signal filtering is necessary for wireless communication. However it causes the signal amplitude to fluctuate and affects the performance of stochastic resonance (SR) receivers. In this study, we evaluate the bit error rate (BER) performance of filtered binary phase-shift keying (BPSK) on an SR receiver. The results show that filtering improves the BER performance of the SR receiver because the amplitude fluctuation contributes to improving the SR effect. We also evaluate the effect of the roll-off factor, which determines the bandwidth of the filter and the amplitude fluctuation. The results demonstrate the applicability of the SR receiver to bandlimited BPSK signals.

Enhancing a BPSK receiver by employing a practical parallel network with Stochastic resonance

“…In this study, a three-level device was employed as the nonlinear system [21,22,24]. The inputoutput characteristics of this system are shown in Fig.…”

“…Thus, a weak attenuated signal may be below the limit, resulting in detection failure. To solve this problem, the effectiveness of receivers exploiting SR has been investigated [18][19][20][21][22][23][24]. With the noise intensity set to the optimal value, it has been revealed that the digital phase of the transmitted signal can be obtained by the receiver [20].…”