2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)最新文献

{"title":"When visible light communications meet photonic nanostructures","authors":"Xilu Yang, Yan Yu, Yujun Xie, Yurong Dong, Pan Zeng, Junyi Gong, Rongqing Liang, Q. Ou, Shuyu Zhang","doi":"10.1109/ICCCHINAW.2017.8355276","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355276","url":null,"abstract":"Organic light-emitting semiconductors present much shorter lifetimes compared to conventional phosphor colour converters, therefore capable of achieving much higher bandwidths in visible light communications. This talk focuses on addressing two of the coming challenges for organic semiconductors: spatial multiplexing and bandwidth enhancement, and explores the roles of photonic nanostructures as a solution to both challenges. The appealing features of visible light communications (VLC), including fast speed, numerous unregulated bandwidth and high security, make VLC an important and promising supplement to the existing Wi-Fi network for the coming 5G communications [1-4]. So far most of the fast VLC links are based on micro-LEDs or laser diodes (LD) which have bandwidths at GHz level, however, in order to achieve high-quality white light, a practical and simple way is to combine a colour converter with the fast-modulated blue LED/LD backlight. Conventional phosphors have bandwidths of only several MHz, so the overall bandwidths of white light sources are severely limited. Organic light-emitting semiconductors have demonstrated intriguing capabilities of boosting bandwidths due to their nanosecond-scale lifetimes [5-10]. For example, conjugated polymers demonstrate bandwidths of over 200 MHz, which are enhanced by two orders of magnitude compared to those of conventional phosphors. This talk focuses on addressing two of the coming challenges for organic semiconductors: i) Can organic semiconductors be applied for parallel communications like multiple-in-multiple-out (MIMO)? ii) Are there potential solutions to further improve the bandwidths of organic semiconductors if the molecular design of fast organic emitters has reached its bottleneck? Colour tuning for organic semiconductors is facile, so parallel communications based on wavelength division multiplexing can be easily realised. On the contrary, organic semiconductors are not born for spatial multiplexing, since they are generally Lambertian emitters. Our strategy to overcome this problem is to use photonic.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117341615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance study of nonlinear models for VLC systems","authors":"L. Tao, Yiguang Wang, H. Tan","doi":"10.1109/ICCCHINAW.2017.8355273","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355273","url":null,"abstract":"In this paper, we present Wiener model (W-model), Hammerstein model (H-model), and parallel Hammerstein model (PH-model) based equalization schemes for the nonlinear distortions mitigation in VLC system. A comparison of performance and complexity using different NLEs is conducted through a PAM based VLC simulation system.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129452925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using phosphors to enhance reception light for visible light communication","authors":"Yan-mei Zhang, Hai-chao Guo, Li Zhang, She Shang, Huan Li, Han Gao, Y. An","doi":"10.1109/ICCCHINAW.2017.8355267","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355267","url":null,"abstract":"Nitride phosphors are widely used in manufacturing white light emitting diodes (LEDs). A visible light communication novelty using nitride phosphor is proposed to realize spectrum shift in light signal reception. Using the phosphor to experiment, the results demonstrate that the optical energy conversion efficiency achieves 80%, the optical transmission reaches 95%. The signal eye diagram represents little impact on signal quality. The experiment results show that the phosphor enhances the received light signal intensity over 3 times at the same distance. The novel solution has immense potential used for indoor and outdoor long distance visible light communication.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131602654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nyquist-PAM-4 transmission using linear DPD and MLSE for indoor visible light communications","authors":"Chao Yang, Wu Liu, Xiang Li, Qi Yang, Zhixue He","doi":"10.1109/ICCCHINAW.2017.8355277","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355277","url":null,"abstract":"350Mbit/s Nyquist-PAM-4 signal is experimentally transmitted over 2-m distance in visible light communication system, which only uses 46-MHz limited system bandwidth. The system bandwidth is expanded with linear digital pre-distortion (DPD), and the strong inter-symbol interference (ISI) caused by Nyquist filter is compensated by maximum likelihood sequence estimation (MLSE) algorithm. The experimental results indicate that the performance of VLC system can be effectively improved with proposed technique.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121404342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monolithic III-nitride photonic circuit for multifunctional visible light communication","authors":"Yuan Jiang, Zheng Shi, Xumin Gao, Jia-lei Yuan, Shuai Zhang, Yongjin Wang","doi":"10.1109/ICCCHINAW.2017.8355274","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355274","url":null,"abstract":"Nitride semiconductor materials inherently have the intriguing functionalities of simultaneous emission, transmission and photodetection, which enable the photonic integration of emitter, waveguide, modulator and photodiode on a single chip [1-3]. In particular, InGaN/GaN multiple-quantum-well (MQW) diodes exhibit a simultaneous light-emitting light-detecting function, endowing the MQW-diode with the capability of producing transmitter and receiver using same fabrication procedure for visible light communication. Both transmitter and receiver share the identical InGaN/GaN MQW active region. To validate the device concept, we propose a wafer-level procedure for the fabrication of monolithic III-nitride photonic circuit on an III-nitride-on-silicon platform for multifunctional visible light communication. Epitaxial films are grown on (111) silicon substrates with intermediate Al-composition step-graded buffer layers, and membrane-type monolithic III-nitride photonic circuit is obtained by a combination of silicon removal and III-nitride film backside thinning. Monolithic III-nitride photonic circuit of emitter, waveguide and photodiode forms an in-plane visible light communication system [4], and the out-of-plane light emission is used for building a free-space visible light communication system [5]. The III-nitride photonic circuit experimentally demonstrates a data transmission over 100 Mb/s on a wire-bonded chip. Moreover, a full-duplex light communication is demonstrated by utilizing simultaneous light-emitting light-detecting function of the MQW-diode, and the self-interference cancellation method is used to decode the superimposed signals. These results are promising for the development of monolithic III-nitride photonic circuit for diverse applications in visible light communication, optical sensor and intelligent displays.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123448803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental demonstration of undersampled color-shift keying optical camera communications","authors":"Pengfei Luo, Zabih Ghassemlooy, S. Zvánovec, Shulan Feng, Philipp Zhang, Min Zhang","doi":"10.1109/ICCCHINAW.2017.8355280","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355280","url":null,"abstract":"An undersampled color shift keying (UCSK) scheme is proposed to support non-flickering red, green, and blue based optical camera communications (OCC). A dedicated framing structure is proposed to allow the receiver to obtain the camera's gamma curve and specify the phase error. A proof-of-concept experimental test-bed is developed to evaluate the bit error rate (BER) and error vector magnitude performance of the proposed OCC system. The experimental results show that the proposed system is able to achieve a data rate of 150 bps with a BER of 1.7×10−3 over a link span of up to 30 m, which is more than adequate for vehicle-to-vehicle communications.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127791072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Visible light communications: Fast-orthogonal frequency division multiplexing in highly bandlimited conditions","authors":"Paul Anthony Haigh, I. Darwazeh","doi":"10.1109/ICCCHINAW.2017.8355265","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355265","url":null,"abstract":"In this paper we propose, for the first time, fast orthogonal frequency division multiplexing (FOFDM) for visible light communications (VLC) systems. VLC systems often exhibit highly band-limited system responses and as such supporting high transmission speeds is a key challenge. FOFDM makes use of an inverse discrete cosine transform (IDCT) to generate the time domain symbols, as opposed to the inverse fast Fourier transform (IFFT) used in OFDM. This offers several advantages for VLC in particular, because sacrificing complex modulation formats in favour of real ones such as pulse-amplitude modulation (PAM) enables reduction of the subcarrier spacing to 1/2T, where T is the symbol period, whilst maintaining orthogonality. This results in a bandwidth saving of 50% in comparison to OFDM, whilst maintaining an equivalent spectral efficiency. Hence in this work, we examine the bit error rate performance of F-OFDM in comparison to conventional OFDM with an equal number of subcarriers and equivalent spectral efficiency for a number of band-limited conditions as a function of the energy-per-bit to noise spectral density ratio (Eb/N0). We demonstrate that due to the 50% bandwidth savings, F-OFDM outperforms OFDM in band-limited conditions, because the impact of the attenuation caused by the band-limitation on each subcarrier is reduced. Therefore, we show that FOFDM results in lower electrical power penalty relative to conventional OFDM for a given set of band-limitation conditions, while maintaining equivalent spectral efficiency.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122275801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adaptive transmission for MIMO VLC systems","authors":"Xinyue Guo, Yang Guo, Shuangshuang Li","doi":"10.1109/ICCCHINAW.2017.8355275","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355275","url":null,"abstract":"We propose and experimentally demonstrate an adaptive transmission technique for MIMO VLC systems. In order to maximize the channel capacity, adaptive transmission is realized by power and bit allocation on de-correlated MIMO channels separately. Experimental results confirm the performance improvement when applying the adaptive transmission to the spatial multiplexing and the space-time coding MIMO systems.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126730807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High speed visible light communication based on PAM-OFDM modulation","authors":"N. Chi, Yiheng Zhao, Jin Ding, Meng Shi","doi":"10.1109/ICCCHINAW.2017.8355272","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355272","url":null,"abstract":"We have proposed a new scheme to reduce the common-mode noise in the visible light communication system. We implemented the simulation based on the new PAM-OFDM structure through MATLAB and tested the performance of VLC channel according to several different specific schemes. Our simulation results validate the high performance of the new scheme for reducing common-mode noise in the VLC system.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128537822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IoT system evaluation methods for very bursty traffic with contention based access","authors":"Yu Feng, Z. Rong, Y. Wei, Yu Feng","doi":"10.1109/ICCCHINAW.2017.8355278","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355278","url":null,"abstract":"One very popular IoT system is characterized by the very bursty traffic in which the transmission occurrence can be as lower as just 200 milliseconds in multiple hours. The traditional Monte Carlo behavioral simulation is very time-consuming for a usual IoT system where the traffic burst is significantly smaller than the hibernation time and the number of terminals is big. Alternatives are analytical approaches using random probability and stochastic process theory, and there have been numerous papers on Slotted ALOHA (S-ALOHA) system. Unfortunately almost all the results obtained so far are based on full buffer traffic model so there is not an efficient approach to evaluate the system performance of an IoT system supporting massive number of terminals with very bursty traffic patterns. Two analytic methodologies are proposed and studied in this paper for very bursty traffic pattern in a contention based access system employing S-ALOHA access with Binary Exponential Back-off (BEB), and a set of closed-form formulae are derived. The first method is based on the probability modeling and the second method is a Markov chain based 2-D analytical model. The fundamental parameter in both methods is the expression for packet transmission probability, and the close-form expressions are derived for both methods. It was verified that the two expressions agree with each other very well. Based on the packet transmission probability, the close form expressions for other system performance indicators are also derived, which includes packet loss rate, transmission time, transmission delay, re-transmission times, collision possibility, and channel utilization efficiency. The proposed methods were verified to match real system performance very well, and they can be the efficient and accurate analytical tools for IoT system performance evaluation and optimization supporting very bursty traffic.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116332461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}