{"title":"随机扩频DS/SSMA接收机芯片波形的自适应优化","authors":"Joon Ho Cho, J. Lehnert","doi":"10.1109/MILCOM.1999.821362","DOIUrl":null,"url":null,"abstract":"We consider the receiver optimization problem in asynchronous direct-sequence spread-spectrum multiple-access (DS/SSMA) communications with random spreading sequences. It is shown that the minimum average bit error rate of a correlation receiver is achieved by adaptively optimizing the receiver chip waveform depending on the energy and delay profiles of interfering users. Instead of directly solving an integral equation which gives the optimum chip waveform, we discretize the receiver chip waveform and develop a simple adaptive algorithm to find an approximate solution. Analytical predictions, as well as numerical results, show that the proposed receiver achieves a significant performance improvement over the conventional correlation receiver by effectively suppressing the multiple-access interference.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Adaptive optimization of receiver chip waveform for DS/SSMA with random spreading sequences\",\"authors\":\"Joon Ho Cho, J. Lehnert\",\"doi\":\"10.1109/MILCOM.1999.821362\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We consider the receiver optimization problem in asynchronous direct-sequence spread-spectrum multiple-access (DS/SSMA) communications with random spreading sequences. It is shown that the minimum average bit error rate of a correlation receiver is achieved by adaptively optimizing the receiver chip waveform depending on the energy and delay profiles of interfering users. Instead of directly solving an integral equation which gives the optimum chip waveform, we discretize the receiver chip waveform and develop a simple adaptive algorithm to find an approximate solution. Analytical predictions, as well as numerical results, show that the proposed receiver achieves a significant performance improvement over the conventional correlation receiver by effectively suppressing the multiple-access interference.\",\"PeriodicalId\":334957,\"journal\":{\"name\":\"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)\",\"volume\":\"98 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-10-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MILCOM.1999.821362\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MILCOM.1999.821362","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Adaptive optimization of receiver chip waveform for DS/SSMA with random spreading sequences
We consider the receiver optimization problem in asynchronous direct-sequence spread-spectrum multiple-access (DS/SSMA) communications with random spreading sequences. It is shown that the minimum average bit error rate of a correlation receiver is achieved by adaptively optimizing the receiver chip waveform depending on the energy and delay profiles of interfering users. Instead of directly solving an integral equation which gives the optimum chip waveform, we discretize the receiver chip waveform and develop a simple adaptive algorithm to find an approximate solution. Analytical predictions, as well as numerical results, show that the proposed receiver achieves a significant performance improvement over the conventional correlation receiver by effectively suppressing the multiple-access interference.