Performance of Decision Feedback Equalizers in Simulated Urban and Indoor Radio Channels (Special Issue on Land Mobile/Portable Propagation)

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概要

• 論文の詳細を見る

• A Decision Feedback Equalizer (DFE) structure with a varying number of tap lengths was used with a recursive least squares (RLS) algorithm to determine tradeoffs between equalizer size and performance in mobile and portable digital radio systems. A mobile channel simulator, SMRCIM, was used to demonstrate how much an equalizer can improve the BER in real world urban channels. The results show that at 850 MHz, the DFE is unable to improve the BER when the mobile terminal exceeds speeds of 115 km/h for U.S. Digital Cellular systems. The performance of adaptive equalization for indoor high data rate systems was evaluated using the indoor channel simulator SIRCIM, and we found that DFEs have excellent performance for indoor radio channels. For simple structures, the BER is less than 10^<-3> at 15 dB E_b/N_0 using coherent QPSK modulation. Finally, an equalizer structure for non-coherent π/4 DQPSK modulation was developed and simulation results are presented.

• 社団法人電子情報通信学会の論文
• 1993-02-25

著者

• Rappaport Theodore

  Mobile And Portable Radio Research Group Bradley Department Of Electrical Engineering Virginia Polyt

• Huang Weifeng

  COMSEARCH

• Feuerstein Martin

  U.S. West Advanced Technologies, Boulder, CO.

• Feuerstein Martin

  U.s. West Advanced Technologies Boulder Co.

関連論文

• Performance of Decision Feedback Equalizers in Simulated Urban and Indoor Radio Channels (Special Issue on Land Mobile/Portable Propagation)

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