Experimental Evaluation of Interference Canceling Equalizer (ICE) for a TDMA Mobile Communication System
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概要
- 論文の詳細を見る
This paper describes the results of a series of laboratory experiments for performance evaluations of our proposed Maximum Likelihood Sequence Estimation (MLSE) based interference canceller, the Interference Canceling Equalizer (ICE), which can cancel both co-channel interference (CCI) and inter-symbol interference (ISI). To verify the feasibility of ICE for the Japanese cellular communications system, a standard of which has been released under the name of Personal Digital Cellular (PDC) system, a prototype system was constructed using 27 TI TMS320C40 Digital Signal Processor (DSP) chips. The ICE prototype works in real-time on the PDC air interface, major specifications of which are π/4 QDPSK 21 k symbols/s 3-channel time-division multiple-access (TDMA). Two-branch diversity reception is used to enhance the signal detection performance of ICE. In the experiments, BER performances were evaluated using the prototype system. Under a single-path Rayleigh fading and a single CCI condition, the ICE receiver attains the BER of less than 3×10^-2with the negative values of the average CIR:for f_D=5Hz and 40Hz, the average CIR more than -20dB and -10dB, respectively. Under a double-path Rayleigh fading and a single CCI condition, the ICE receiver attains the BER of less than 1.5×10^-2 with the negative values of the average CIR:for f_D=5Hz and 40Hz, the average CIR more than -20dB and -10dB, respectively. The laboratory test results suggest that the ICE receiver has potential for system capacity enhancement.
- 社団法人電子情報通信学会の論文
- 2001-02-01
著者
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SUZUKI Hiroshi
Tokyo Institute of Technology
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Yoshino Hitoshi
Wireless Laboratories, NTT DoCoMo, Inc.
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Yoshino Hitoshi
Research Laboratories Ntt Docomo Inc.
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Yoshino Hitoshi
Wireless Laboratories Ntt Docomo Inc.
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