Solid line in (b) shows the deviation of noise variance calculated by the proposed method from actual noise variance. Dotted line in (b) shows the deviation of noise variance calculated by the traditional method (after Bob receives all variables, Alice and Bob randomly select a certain proportion of variables for channel-state estimation) from actual noise variance. Ordinate of (b) represents the deviation between actual noise variance and estimated noise variance. Starting from the remaining initial variables, the channel state is estimated using the variables after reconciliation). After Bob receives them, both parties disclose the partial initial variables for the first time to estimate the channel state. Dotted line in (a) is the channel-state estimation proposed in this paper (Alice sends the coherent states to Bob repeatedly and randomly. The SNR is the difference between the received wireless signal and the noise floor. There is a concept known as the Signal to Noise Ratio or SNR, that ensures the best wireless functionality. Solid line in (a) is the actual noise variance of each group of variables calculated by Eq. ( 3). Checking Signal Strength and Throughput on a Cisco Meraki Wireless network. Ordinate of (a) represents noise variance. Abscissa represents the number of variable sets tested in the experiment. Reuse & PermissionsĪctual noise variance versus estimated noise variance. Bob starts to prepare for information reconciliation of the next set of initial variables. After reconciliation, Alice uses initial variables to perform channel-state estimation and sends the result to Bob. Matching code rate, R b, required for reconciliation comes from the channel-state estimation results of the previous set of initial variables. Bob conducts information reconciliation on x and y. After quantum state measurement and sifting, communication parties share a set of initial variables, x and y. Alice transmits coherent states to Bob through the quantum channel repeatedly and randomly, and both parties postprocess on the classical authentication channel. Hom, homodyne detector QRNG, quantum random-number generator x and y, initial variables b, random binary sequences generated by the QRNG c, polar-encoder-output sequence M ( y ′, c ′ ), rotation-mapping function R b, matching code rate v, decoder-input sequence. Rate-adaptive CV QKD reverse polar-coding-based reconciliation scheme based on multidimensional reconciliation.
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