DS-CDMA System with Symbol Ranking Type Interference Canceller(SRIC)(Special Issue on Third Generation Land Mobile Communication Systems)
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概要
- 論文の詳細を見る
The Future Public Land Mobile Telecommunication Systems(FPLMTS)standards have made it quite clear that in the near future, the capability in doing wireless data transmission will become necessary in order to make the tetherfree use of multimedia applications possible. CDMA is considered the most appropriate and probable radio access method of FPLMTS for its high capacityand flexibility in accommodation of multimedia and variable rate users. In order to further increase the capacityof CDMA system, several techniques have been studied and proposed such as an interference canceller and adaptive array antenna. We propose the novel multi-user detection type interference cancellation technique named SRIC(Symbol Ranking type IC)in this paper. SRIC is very feasible for its small amount of operation compared with other multi-user detection type ICs and can be added to a base station with slight alteration according to the requirement ofhigher capacity. The performance of SRIC depends on the method of calculating the likelihood. We studied three methods. In order to reduce the operations, we tried to propose two more methods. We confirmed that SRIC can make the system capacity about three times greater than that of a conventional RAKEreceiver. We also confirmed that SRICcan be reduce its operations very much at some sacrifice of their performance. There are nine variants of SRIC, which have a trade off between performance and amount of operation. Wecan choose one of them which is most fit to our requirement. The first operation ofSRIC is common with that of aconventional RAKE receiver. Therefore, SRIC can be introduced to conventional systems afterwards by inserting theinterference canceller block which functions replica generation, removal, and rankingbetween output of a RAKE receiver andFEC decoder.
- 社団法人電子情報通信学会の論文
- 1998-07-25
著者
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HOMMA Koichi
Department of Communication and Network Engineering, Tokai University
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Uesugi M
Panasonic Mobile Communications Co. Ltd. Yokosuka‐shi Jpn
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Homma K
Telecom Research Laboratory Matsushita Communication Industrial Co. Ltd.
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Homma Koichi
Department Of Communication And Network Engineering Tokai University
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KATO Osamu
Telecom Research Laboratory, Matsushita Communication Industrial Co., Ltd.
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Kato O
Japan Metals And Chemicals Co. Ltd. Iwate Jpn
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UESUGI Mitsuru
the Telecom Research Laboratory, Matsushita Communication Industrial Co., Ltd.
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KATO Osamu
the Telecom Research Laboratory, Matsushita Communication Industrial Co., Ltd.
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HOMMA Koichi
the Telecom Research Laboratory, Matsushita Communication Industrial Co., Ltd.
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