Abstract
A recently proposed frequency hopping receiver based on the simultaneous photonics filtering and digitizing system can provide large receiving frequency range as well as high hopping speed by rapidly tuning the optical sampling pulses. With the increase of the hopping speed, the shape of the optical sampling pulses is changed rapidly, and the receiving performance, including the off-band suppression and receiving bandwidth of the proposed frequency hopping receiver is degraded. The performance degradation is indicated in experiments, evaluated theoretically, and analyzed by numerical simulations. Simulations on the shortest frequency hopping time indicate that the receiving passbands are broadened less than 10% with more than 25 sampling periods, and less than 1% with more than 225 sampling periods. The proposed frequency hopping receiver can receive frequency hopping signals with higher hopping speed by utilizing higher sampling rates.
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