In this paper, based on the characteristics of polar codes, a new decode-and-forward strategy called generalized partial information relaying protocol is proposed for degraded multiple-relay networks with orthogonal r...In this paper, based on the characteristics of polar codes, a new decode-and-forward strategy called generalized partial information relaying protocol is proposed for degraded multiple-relay networks with orthogonal receiver components(MRNORCs). In such a protocol, with the help of partial information from previous nodes, each relay node tries to recover the received source message and re-encodes part of the decoded message for transmission to satisfy the decoding requirements for the following relay node or the destination node. In order to construct practical polar codes, the nested structures are developed based on this protocol and the information sets corresponding to the partial messages forwarded are also calculated. The proposed scheme is proved to be capable of achieving the theoretical capacity of the degraded MRN-ORCs while still retains the low-complexity feature of polar codes. We perform simulations to testify the practicability of the proposed scheme and compare polar codes by using successive-cancellation list decoder(SCLD) with traditional low-density parity-check(LDPC) codes. The results show that the obtained polar codes provide significant gain.展开更多
A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system con...A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system confirm low optical loss and environmental stabilities.展开更多
In recent years,two-dimensional(2D)material moirésuperlattices have emerged as a research focus in condensed matter physics and materials science due to their unique physical properties[1,2].These phenomena funda...In recent years,two-dimensional(2D)material moirésuperlattices have emerged as a research focus in condensed matter physics and materials science due to their unique physical properties[1,2].These phenomena fundamentally stem from the synergistic interplay between electron correlation effects and topological characteristics under periodic modulation.展开更多
基金supported by the National Natural Science Foundation of China (No.41574137, 41304117)
文摘In this paper, based on the characteristics of polar codes, a new decode-and-forward strategy called generalized partial information relaying protocol is proposed for degraded multiple-relay networks with orthogonal receiver components(MRNORCs). In such a protocol, with the help of partial information from previous nodes, each relay node tries to recover the received source message and re-encodes part of the decoded message for transmission to satisfy the decoding requirements for the following relay node or the destination node. In order to construct practical polar codes, the nested structures are developed based on this protocol and the information sets corresponding to the partial messages forwarded are also calculated. The proposed scheme is proved to be capable of achieving the theoretical capacity of the degraded MRN-ORCs while still retains the low-complexity feature of polar codes. We perform simulations to testify the practicability of the proposed scheme and compare polar codes by using successive-cancellation list decoder(SCLD) with traditional low-density parity-check(LDPC) codes. The results show that the obtained polar codes provide significant gain.
基金This research is supported by a grant from FUTABA DENSHI foundation.
文摘A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system confirm low optical loss and environmental stabilities.
基金supported by the National Natural Science Foundation of China(52272135,62375020,92163206,and 62274010)the National Key Research and Development Program of China(2022YFA1403302,2021YFA1400100,and 2020YFA0308800)+3 种基金the Young Elite Scientists Sponsorship Program by CAST(2023QNRC001)the Beijing Natural Science Foundation(Z19J00015)the CAS Youth Interdisciplinary Team,Beijing National Laboratory for Condensed Matter Physics(2024BNLCMPKF003)the Fundamental Research Funds for the Central Universities(2023CX01030)。
文摘In recent years,two-dimensional(2D)material moirésuperlattices have emerged as a research focus in condensed matter physics and materials science due to their unique physical properties[1,2].These phenomena fundamentally stem from the synergistic interplay between electron correlation effects and topological characteristics under periodic modulation.
