We experimentally demonstrate superchannel transmission of 515 Gb/s polarization division multiplexing (PDM) 128-QAM over 155-km standard single-mode fiber (SSMF) with erbium-doped fiber amplifiers (EDFA) amplificatio...
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ISBN:
(纸本)9781479950485
We experimentally demonstrate superchannel transmission of 515 Gb/s polarization division multiplexing (PDM) 128-QAM over 155-km standard single-mode fiber (SSMF) with erbium-doped fiber amplifiers (EDFA) amplification. The bit error rates (BER) for all subbands after transmission is lower than the soft-decision-forward-error-correction (SD-FEC) limit 2.4×10~(-2).
A broadband co-site and co-channel RF interference cancellation system is proposed and demonstrated. 57-dB and 37-dB cancellations are obtained over 10-MHz and 400-MHz bandwidths, respectively. The scheme works well f...
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To handle the handover challenge in Express Train Access networks(ETAN).mobility fading effects in high speed railway environments should be addressed *** on the investigation of fading effects in this paper,we obtain...
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To handle the handover challenge in Express Train Access networks(ETAN).mobility fading effects in high speed railway environments should be addressed *** on the investigation of fading effects in this paper,we obtain two theoretical bounds:HOTiming upper bound and HO-Margin lower bound,which are helpful guidelines to study the handover challenge today and in the ***,we apply them to analyze performance of conventional handover technologies and our proposal in *** follow-up theory analyses and simulation experiment results demonstrate that the proposed handover solution can minimize handover time up to 4ms(which is the fastest one so far),and reduce HO-Margin to 0.16 dB at a train speed of 350km/h.
Tapered photonic crystal fiber was designed and fabricated to support an octave spanning supercontinuum generation, directly pumped by an 500 MHz Yb:fiber oscillator. More than 40dB fceo signals were detected and locked.
Tapered photonic crystal fiber was designed and fabricated to support an octave spanning supercontinuum generation, directly pumped by an 500 MHz Yb:fiber oscillator. More than 40dB fceo signals were detected and locked.
Recent studies have proposed a novel “listen-and-talk” (LAT) protocol for cognitive radio, in which secondary users (SUs) can sense and access the spectrum simultaneously with the assistance of full-duplex technique...
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ISBN:
(纸本)9781479958337
Recent studies have proposed a novel “listen-and-talk” (LAT) protocol for cognitive radio, in which secondary users (SUs) can sense and access the spectrum simultaneously with the assistance of full-duplex techniques. In this paper, we consider a LAT based cognitive radio network (CRN) consisting of SUs equipped with two antennas, and study the cooperative spectrum sensing (CSS) problem to improve sensing perfor-mance. We derive the analytical miss detection and false alarm probabilities of the system, and make comparison with the traditional “listen-before-talk” (LBT) CSS. Theoretical analysis and simulation results verify the proposed CSS method. Results indicate that when the secondary transmit power is low, the LAT CSS outperforms the LBT one in the secondary throughput. We also find out that there exists a transmit power-throughput tradeoff, and an optimal secondary transmit power can be designed to maximize the achievable throughput for the CRNs.
Massive MIMO systems offer a high spatial resolution that can drastically increase the spectral and/or energy efficiency by employing a large number of antennas at the base station(BS).In a distributed massive MIMO sy...
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Massive MIMO systems offer a high spatial resolution that can drastically increase the spectral and/or energy efficiency by employing a large number of antennas at the base station(BS).In a distributed massive MIMO system,the capacity of fiber backhaul that links base station and remote radio heads is usually limited,which becomes a bottleneck for realizing the potential performance gain of both downlink and *** solve this problem,we propose a joint antenna selection and user scheduling which is able to achieve a large portion of the potential gain provided by the massive MIMO array with only limited backhaul *** sub-optimal iterative algorithms with the objective of sumrate maximization are proposed for the joint optimization of antenna selection and user scheduling,either based on greedy fashion or Frobenius-norm *** and complexity analysis are presented for the *** provided Monte Carlo simulations show that,one of our algorithms achieves a good tradeoff between complexity and performance and thus is especially fit for massive MIMO systems.
A nanoscale silicon optical 90° hybrid for TM polarization is realized. High performance over C-band is measured with an extinction ratio larger than 20dB, excess loss less than 1dB and phase deviation better tha...
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ISBN:
(纸本)9781479922840
A nanoscale silicon optical 90° hybrid for TM polarization is realized. High performance over C-band is measured with an extinction ratio larger than 20dB, excess loss less than 1dB and phase deviation better than 5°.
In this paper, we introduced a hardware acceleration coprocessor design of HIMAC 2.0 in HINOC 2.0 system. The main function of HIMAC 2.0 have been detailed and compared with corresponding part of HINOC 1.0. By buildin...
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ISBN:
(纸本)9781479921898
In this paper, we introduced a hardware acceleration coprocessor design of HIMAC 2.0 in HINOC 2.0 system. The main function of HIMAC 2.0 have been detailed and compared with corresponding part of HINOC 1.0. By building the self-testing platform and designing the test scheme, the design, which has been simulated and has passed the FPGA verification, realizes 1Gbps data transmission between HIMAC 2.0 and Ethernet.
We proposed a size-scalable and cost-efficient OXC architecture using limited port fine-granularity bandwidth-variable wavelength selective switches and waveband selective switches for elastic optical network, as well...
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We proposed a size-scalable and cost-efficient OXC architecture using limited port fine-granularity bandwidth-variable wavelength selective switches and waveband selective switches for elastic optical network, as well as a routing and spectrum allocation scheme.
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