Orthogonal Forward Link Using Orthogonal Multi-Spreading Factor Codes for Coherent DS-CDMA Mobile Radio

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概要

• 論文の詳細を見る

• This paper presents a generation method of orthogonal spreading codes with different spreading factors(SFs), which are called orthogonal multi-SF spreading codes in this paper, for DS-CDMA mobile radio. The generated orthogonal multi-SF spreading codes have a tree structure and the codes are applied to the forward link such that all users, who transmit data at different rates, are orthogonalized. A group spreading modulator that simplifies the base station transmitter structure is also described. The transmission performance of the orthogonal multi-SF forward link under multi-user and frequency selective Rayleigh fading evironments is evaluated by computer simulation to show that its performance is identical to that achieved by using multiple orthogonal spreading codes in parallel(orthogonal multicode forward link). Unlike the orthogonal multicode forward link, only a single Rake combiner is required at a mobile receiver which significantly simplifies the mobile receiver structure.

• 社団法人電子情報通信学会の論文
• 1998-04-25

著者

• Okawa Koichi

  The Authors Are With R&d Department Ntt Mobile Communications Network Inc.

• ADACHI Fumiyuki

  The authors are with the R&D Department, NTT Mobile Communications Network Inc.

• Adachi Fumiyuki

  The Authors Are With R&d Department Ntt Mobile Communications Network Inc.

関連論文

• Matched Filter-Based RAKE Combiner for Wideband DS-CDMA Mobile Radio(Special Issue on Third Generation Land Mobile Communication Systems)
• Wireless Past and Future : Evolving Mobil Communications Systems : Special Section on the 10th Anniversary of Trans. Fundamentals : Last Decade and 21st Century
• Orthogonal Forward Link Using Orthogonal Multi-Spreading Factor Codes for Coherent DS-CDMA Mobile Radio
• Performance Comparison between Time-Multiplexed Pilot Channel and Parallel Pilot Channel for Coherent Rake Combining in DS-CDMA Mobile Radio(Special Issue on Third Generation Land Mobile Communication Systems)

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