{"title":"嵌入Walsh-Hadamard码字的turbo编码DS/CDMA系统:编码器设计与性能评估","authors":"D.J. van Wykt, L. Linde","doi":"10.1109/ISSSTA.1998.723806","DOIUrl":null,"url":null,"abstract":"This paper presents the design of a turbo encoding scheme with embedded Walsh-Hadamard (WH) codewords, and a suitable decoder structure based on an iterative decoding technique, akin to the work on \"superorthogonal\" turbo codes presented by Pehkonen and Komulainen (see ISSSTA'96: International Symposium on Spread Spectrum Techniques & Applications, Mainz, Germany, p.580-4, 1995). The main contribution of this paper is a detailed design of the turbo decoder structure required to perform the required decoding steps, omitted by Pehkonen et al. The performance of the proposed iterative turbo coded DS/CDMA receiver is then studied in an mobile radio environment. Attention is focused on an 8-state rate 2/64 coded QPSK DS/CDMA system, in agreement with the rate offered by the IS-95 coding scheme. The bit error rate performance of the proposed coding scheme is evaluated by means of simulation and compared to that of a DS/CDMA system employing the IS-95 front-end coder for the reverse link channel.","PeriodicalId":116377,"journal":{"name":"1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1998-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"A turbo coded DS/CDMA system with embedded Walsh-Hadamard codewords: coder design and performance evaluation\",\"authors\":\"D.J. van Wykt, L. Linde\",\"doi\":\"10.1109/ISSSTA.1998.723806\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper presents the design of a turbo encoding scheme with embedded Walsh-Hadamard (WH) codewords, and a suitable decoder structure based on an iterative decoding technique, akin to the work on \\\"superorthogonal\\\" turbo codes presented by Pehkonen and Komulainen (see ISSSTA'96: International Symposium on Spread Spectrum Techniques & Applications, Mainz, Germany, p.580-4, 1995). The main contribution of this paper is a detailed design of the turbo decoder structure required to perform the required decoding steps, omitted by Pehkonen et al. The performance of the proposed iterative turbo coded DS/CDMA receiver is then studied in an mobile radio environment. Attention is focused on an 8-state rate 2/64 coded QPSK DS/CDMA system, in agreement with the rate offered by the IS-95 coding scheme. The bit error rate performance of the proposed coding scheme is evaluated by means of simulation and compared to that of a DS/CDMA system employing the IS-95 front-end coder for the reverse link channel.\",\"PeriodicalId\":116377,\"journal\":{\"name\":\"1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333)\",\"volume\":\"58 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-09-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISSSTA.1998.723806\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISSSTA.1998.723806","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A turbo coded DS/CDMA system with embedded Walsh-Hadamard codewords: coder design and performance evaluation
This paper presents the design of a turbo encoding scheme with embedded Walsh-Hadamard (WH) codewords, and a suitable decoder structure based on an iterative decoding technique, akin to the work on "superorthogonal" turbo codes presented by Pehkonen and Komulainen (see ISSSTA'96: International Symposium on Spread Spectrum Techniques & Applications, Mainz, Germany, p.580-4, 1995). The main contribution of this paper is a detailed design of the turbo decoder structure required to perform the required decoding steps, omitted by Pehkonen et al. The performance of the proposed iterative turbo coded DS/CDMA receiver is then studied in an mobile radio environment. Attention is focused on an 8-state rate 2/64 coded QPSK DS/CDMA system, in agreement with the rate offered by the IS-95 coding scheme. The bit error rate performance of the proposed coding scheme is evaluated by means of simulation and compared to that of a DS/CDMA system employing the IS-95 front-end coder for the reverse link channel.
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