News Column

Researchers' Work from Beijing University of Posts and Telecommunications Focuses on Electronics and Communications

June 4, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- Fresh data on Electronics and Communications are presented in a new report. According to news reporting originating from Beijing, People's Republic of China, by VerticalNews correspondents, research stated, "This study comprehensively investigates the performance of the downlink massive multiple-input multiple-output (MIMO) system with channel state information (CSI) delay, when the base station serves multiple user terminals (UTs) taking advantage of maximum ratio transmission precoding. Through the characteristic analysis of the received signal-to-interference-plus-noise ratio at UT, the tight lower bound of average area spectrum efficiency (SE) and its asymptotic bound with the infinite number of UTs are deduced, respectively."

Our news editors obtained a quote from the research from the Beijing University of Posts and Telecommunications, "Based on the asymptotic bound and the realistic power consumption model consisting of both radiated power and circuit power, the trade-off between SE and energy efficiency (EE) is developed, and the optimal EE with respect to SE is attained concisely. Moreover, the approximate expressions of both outage probability and bit error ratio (BER) are derived when the massive MIMO system works at its interference limited region."

According to the news editors, the research concluded: "All theoretical results coincide to numerical results, and they show that deploying more transmission antennas will be helpful to improve SE, EE and reliability simultaneously; SE will be enhanced; however, the reliability, including both outage probability and BER, will be worsened by multiplexing more UTs; enlarging CSI delay can extensively deteriorate SE, EE and reliability."

For more information on this research see: Performance analysis for downlink massive multiple-input multiple-output system with channel state information delay under maximum ratio transmission precoding. IET Communications, 2014;8(3):390-398. IET Communications can be contacted at: Inst Engineering Technology-Iet, Michael Faraday House Six Hills Way Stevenage, Hertford SG1 2AY, England. (The Institution of Engineering and Technology -; IET Communications -

The news editors report that additional information may be obtained by contacting L. Zhao, Beijing Univ Posts & Telecommun, Key Lab Universal Wireless Commun, Wireless Signal Proc & Network Lab, Minist Educ, Beijing 100876, People's Republic of China. Additional authors for this research include K. Zheng, H. Long, H. Zhao and W.B. Wang.

Keywords for this news article include: Asia, Beijing, People's Republic of China, Electronics and Communications

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Source: Electronics Newsweekly