iosr-JECE   Volume-12 ~ Issue-3 ~ May-June 2017

Abstract: In order to avoid the inconvenience caused by the complex environment of industrial production to the data transmission,a data acquisition method is designed, which is more efficientand low power consumption compared to the traditional wireless transmission.Combined with the characteristics of ZigBee technology applied to data acquisition system, the hardware design method of data acquisition node based on CC2530 chip and the network of each node in the network are discussed,including the software design method of adding network.In this paper, we are going to realize the workshop network management, and the computer terminal can detect the status information of multiple devices in real time..............

Keywords: Wireless sensor network; ZigBee; data acquisition

[1]. IAN F A ,MEHMET C V. Wireless sensor networks[M]. Hoboken,New Jersey,USA: John Wiley&Sons, 2010.
[2]. WALTENEGUS D, CHRISTIAN P. Fundamentals of wireless sensor networks: theory and pratice [M]. Hoboken, New Jersey, USA: John Wiley&Sons,2010.
[3]. ALTHAUS E, CALINESCU G, MANDOIU I, et al.Power efficient range assignment in Ad Hoc wireless networks [C]/ /Proceedings of the 2003 IEEE Conference on Wireless Communication and Networking.Piscataway: IEEE, 2003:1889-1894.
[4]. Cha Yong Dae,Yoon Gilwon. Ubiquitous health monitoring system for multiple users using a ZigBee and WLAN dual-network.[J]. Telemedicine and e-Health, 2009, 159:165.
[5]. Li Junbin, Hu Yongzhong. Design and application of ZigBee communication network based on

Abstract: MIMO-OFDM system is fast growing new wireless broadband technology which has capability of high data rate transmission and advantages like inter carrier interference (ICI) reduction; high reliability; and better performance in multi-path fading. The major effect to be considered at receiver is fading effects which must be mitigated at receiver using equalization technique. In this paper we presented PAPR reduction in MIMO-OFDM with resource block, when it is compared with existing PAPR reduction techniques such as conventional PTS, selected mapping, clipping and filtering. The simulation shows PAPR reduction.

Keywords: Multiple input multiple output (MIMO), orthogonal frequency division multiplexing (OFDM), Partial Transmit Sequence (PTS), Space Frequency Block Coding (SFBC).

[1]. Sheng-Ju Ku, " Low-Complexity PTS-Based Schemes for PAPR Reduction in SFBC MIMO-OFDM Systems. IEEE Transactions on Broadcasting, VOL. 60, NO. 4, December 2014.
[2]. T. Jiang and Y.Wu, "An overview: Peak-to-average power ratio reduction techniques for OFDM signals," IEEE Trans. Broadcast., vol. 54, no. 2,pp. 257–268, Jun. 2008
[3]. S.-J. Ku, C.-L. Wang, and C.-H. Chen, "A reduced-complexity PTS-based PAPR reduction scheme for OFDM systems," IEEE Trans.Wireless Commun., vol. 9, no. 8, pp. 2455–2460, Aug. 2010.
[4]. J. Hou, J. Ge, and J. Li, "Peak-to-average power ratio reduction of OFDM signals using PTS scheme with low computational complexity,"IEEE Trans. Broadcast., vol. 57, no. 1, pp. 143–148, Mar. 2011.
[5]. S.-H. Wang and C.-P.Li, "A low-complexity PAPR reduction scheme for SFBC MIMO-OFDM systems," IEEE Signal Process. Lett., vol. 16 no. 11, pp. 941–944, Nov. 2009.

Abstract:With the development of science and technology, the mobile communication technology has a huge change. Such as, the mobile technology of 3G, which was used widely by people, will disappear slowly in the near future. However, the 4G and 5G will be study and then will be widely used. The fifth generation mobile communication system (5G) is a new generation of mobile communication system after 2020 and its technological development is still in the exploratory stage. In this paper, we will talk about the key elements of this hot technology—4G and 5G.

Keywords: 4G, 5G, mobile communication technology, mobile phone, mobile communication tools

[1]. Zhu-hu Xiao, Development trend and key technologies of 5G mobile communication, Chinese Science, 2014, (5).
[2]. Xian-ying Zhang, Technical analysis of the 4th generation mobile communication technology, Digital Communication World, 2011, (6)
[3]. WU Wei-chi, ZHANG Duo-ying. Research on the key technologies of optical orthogonal frequency division multiplexing [J].Optical Communication Technology, 2013, (11):5-8.
[4]. Boccardi F, Heath R W, Lozano A, et al. Five disruptive technology directions for 5G[J]. Communications Magazine IEEE, 2014, 52(2):74-80.