Delayed Symbol Combining Interference Canceller for Multi Rate DS-CDMA in Mobile Radio Environment(Special Section on Fundamentals of Multi-dimensional Mobile Information Network)

スポンサーリンク

概要

• 論文の詳細を見る

• Direct sequence code division multiple access(DC-CDMA) is attractive for mobile radio use because of its inherently high capacity. There is great demand for mobile radio to offer multimedia services. This means that various service rates and qualities should be supported. DS-CDMA systems are flexible and can accommodate various user rates easily so these demands can be met. As many users will occupy the same frequency band simultaneously, the traffic capacity of a DS-CDMA system is determined by interference power. Interference cancellation is one of the important techniques in decreasing interference power at the demodulation stage and thus increasing traffic capacity. In this paper, we propose the delayed symbol combining interference canceller which can suppress the interference from various users sending at different information rates. Performance of the proposed method is calculated by computer simulations. Furthermore, the effect of adding forward error correction to the proposed canceller is also evaluated by computer simulations. In the quasi static flat fading environment, it is found that the Eb/No degradation due to interference is suppressed to 3 dB at BER=10^<-3> with 24 users. In the quasi static frequency selective fading environment, it is found that the required Eb/No of the frequency selective fading canceller is about 11 dB better than that of the flat fading canceller for the target BER of 10^<-3>. It is found that BER<10^<-3> is achieved with forward error correction and bit interleaving even when the maximum Doppler frequency normalized by low data bit rate is 0.0008 and Eb/No is 20[dB]in frequency selective fading and 30[dB]in flat fading.

• 社団法人電子情報通信学会の論文
• 1998-07-25

著者

• Ogose S

  Ntt Wireless Systems Laboratories

• Ogose Shigeaki

  Ntt Wireless Systems Laboratories

• Kudoh E

  Dept. Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku University

• Kudoh E

  Ntt Wireless Systems Lab. Yokosuka‐shi Jpn

• KUDOU Eisuke

  NTT Wireless Systems Laboratories

関連論文

• Theoretical Study of Site Selection Diversity Transmission in DS-CDMA Cellular Mobile Radio(Wireless Communication Technologies)
• B-5-149 Reverse Link Performance of Site Diversity based Transmit Power Control with Antenna Diversity and Rake Combining in DS-CDMA Mobile Radio
• Delayed Symbol Combining Interference Canceller for Multi Rate DS-CDMA in Mobile Radio Environment(Special Section on Fundamentals of Multi-dimensional Mobile Information Network)
• Analysis of DS-CDMA Transmission Performance in the Presence of Pure Impulsive Interference over Frequency Selective Fading(Regular Section)
• The Lower Bound of Open Loop Transmission Power Control Error in DS-CDMA System

スポンサーリンク