Abstract
Rydberg atoms have been extensively utilized in microwave measurement with high sensitivity, which has great potential in the field of communication. In this study, we discuss the digital communication based on a Rydberg atomic receiver under simultaneously coupling by resonant and near detuning microwaves. In addition, we verify the feasibility of the Rydberg atom-based frequency division multiplexing (FDM) in microwave communication. We demonstrate the principle and performance of the atom-based FDM receiver by applying amplitude modulation (AM) and frequency modulation (FM), respectively. To demonstrate the actual communication performance at different data transfer rates, we consider monochromatic images as an example. The experimental results show that the maximum acceptable data transfer rate of both AM and FM is about 200 kbps, whereas their maximum bit error rates (BER) is less than 5%. When compared with the traditional electronic receiver, this atomic receiver, which is compatible with FDM, has numerous advantages, such as small size, low power consumption, and high sensitivity. Furthermore, this receiver has a strong ability of anti-electromagnetic interference, and the signals transmitted do not interfere with each other in different channels.
Highlights
With the new developments in precision measurement technology, numerous atom-based sensors and communication devices have been proposed and verified in laboratories
To analyze the ICI, we studied the variation of signal-to-noise ratio (SNR) of receiving signals with ∆ RF, and the cross-talk between the actual signals obtained on the spectrum analyzer; here, ∆ RF represents the frequency difference between two carriers
The experimental results show that the maximum acceptable data transfer rate of both amplitude modulation (AM) and frequency modulation (FM) is ~200 kbps, whereas their maximum bit error rates (BER) is less than 5%
Summary
With the new developments in precision measurement technology, numerous atom-based sensors and communication devices have been proposed and verified in laboratories. Many new concepts and technologies of Radio Frequency Electric field (RF E-field) measurements in the quantum sensing domain have been presented, such as Rydberg atoms Because of their high precision, sensitivity, and as the measurement results can be directly traced to the international system of units (SI) via atomic constant [1,2], they have great potential in many application scenarios. Using the abundant microwave-transition energy levels between Rydberg states, instead of recovering the time-varying signal on the specific RF-carrier frequency, we simultaneously couple resonant and detuning microwaves to verify the feasibility of dual-carrier communication and achieve frequency division multiplexing (FDM). This can improve spectral performance and allow real-time channel multiplexing. The image data reception is performed and practical indicators for AM and FM communication are discussed, respectively
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