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2007 3rd International Workshop on Signal Design and Its Applications in Communications最新文献

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Partial Correlations of Galois Ring Sequences 伽罗瓦环序列的偏相关
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408347
S. Boztaş, P. Udaya
{"title":"Partial Correlations of Galois Ring Sequences","authors":"S. Boztaş, P. Udaya","doi":"10.1109/IWSDA.2007.4408347","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408347","url":null,"abstract":"Galois ring m-sequences were introduced in the late 1980s and early 1990s, and have near-optimal full periodic correlations. They are related to Z4-linear codes, and are used in CDMA communications. We consider periodic correlation and obtain algebraic expressions of the first two partial period correlation moments of these sequences. These correlation moments have applications in synchronisation performance of CDMA systems using Galois ring m-sequences.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123110953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
An ISI Transmission and the Optimal Detection/Decoding of the Coded ISI System ISI传输和编码ISI系统的最佳检测/解码
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408378
Xi-lin Zhang, Wei Jiang, Daoben Li
{"title":"An ISI Transmission and the Optimal Detection/Decoding of the Coded ISI System","authors":"Xi-lin Zhang, Wei Jiang, Daoben Li","doi":"10.1109/IWSDA.2007.4408378","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408378","url":null,"abstract":"A high-speed transmission of the lower-order modulated signals that would bring intersymbol interference (ISI) is researched. At the receiver of the new system, oversampling and the maximum likelihood sequence detection(MLSD) is used. Under the same spectral efficiency, the bit error rate performance of the new system is compared with that of high-order modulated symbol-by-symbol transmission. It is concluded that the new system utilizing MLSD detector could make full use of the inherent anti-jamming capability of the system and outperform the non-ISI symbol-by-symbol system. The optimal soft-in soft-out ISI detection joined with the decoding is proposed for the channel coded ISI system. Under the maximum a posteriori probability (MAP) criterion, the soft information is passed iteratively between the detector and the decoder. Simulation results show that the optimal performance is obtained because of the encoding constraining naturally formed by ISI.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124838837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Designing of Fountain Codes with Short Code-Length 短码长喷泉码的设计
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408410
Hongjie Zhu, Chao Zhang, Jianhua Lu
{"title":"Designing of Fountain Codes with Short Code-Length","authors":"Hongjie Zhu, Chao Zhang, Jianhua Lu","doi":"10.1109/IWSDA.2007.4408410","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408410","url":null,"abstract":"Fountain codes is a class of forward correcting codes (FEC) very suitable for applications like content dissemination and reliable multicasting in erasure channels. However, the code-length of the traditional fountain codes is quite large that holds back the data fountain scheme from efficiently supporting real-time services and resource restricted applications. This paper focuses on the designing of short-length fountain codes. Since the degree distribution of the input symbols plays an important role in achieving good decoding performance, a novel designing method for degree distribution is proposed. Simulation results show that by this method practicable short-length codes can be constructed, e.g., a code of length of 2000 achieving complete decoding with probability of 99.5% is demonstrated.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125159413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
Performance Analysis of Overlapped Multiplexing Techniques 重叠复用技术的性能分析
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408366
Hui Jiang, Daoben Li, Weidong Li
{"title":"Performance Analysis of Overlapped Multiplexing Techniques","authors":"Hui Jiang, Daoben Li, Weidong Li","doi":"10.1109/IWSDA.2007.4408366","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408366","url":null,"abstract":"A class of overlapped multiplexing techniques is presented in this paper, and it includes overlapped time division multiplexing (OVTDM), overlapped frequency division multiplexing (OVFDM) and overlapped time-frequency division multiplexing (OVTFDM). This paper focus on OVTDM, and this new technique can implement transmission with super-high spectral efficiency only by low order modulated signals , and its feature is that there is overlapping between neighbor signals in time domain, which is used to raise the spectral efficiency of the system and generate the coding constraint relationship, thus improving transmission reliability. The theory of OVFDM and OVTFDM is similar to it. Simulation results verify the validity of this theory in additive white Gaussian noise (AWGN) channel and multipath fading channel.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125391057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
ASIC Implementation of Low Power Decimation Filter for UMTS and GSM Sigma-Delta A/D Converter UMTS和GSM Sigma-Delta A/D转换器低功耗抽取滤波器的ASIC实现
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408364
Chi Zhang, E. Ofner
{"title":"ASIC Implementation of Low Power Decimation Filter for UMTS and GSM Sigma-Delta A/D Converter","authors":"Chi Zhang, E. Ofner","doi":"10.1109/IWSDA.2007.4408364","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408364","url":null,"abstract":"This work proposes an ASIC implementation of low power non-recursive decimation filters in a GSM and UMTS dual mode sigma delta ADC. An alternative that saves 70% to 80% power consumption to the standard CIC approach is discussed here with a decimation factor of m-th power of two and m-th power of three. More research is done to find the break-even point between power consumption and silicon area for non-recursive and recursive architectures. The chip is fabricated in 0.35 mum CMOS and consumes 4.72 mW in GSM and 5.54 mW in UMTS mode, both at Vdd=2.5 V.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115100711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Application of the ZCZ Sequence Pairs Set in QS-CDMA System ZCZ序列对集在QS-CDMA系统中的应用
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408379
Qi Li, Junping Gao, Xiaoqun Zhao
{"title":"The Application of the ZCZ Sequence Pairs Set in QS-CDMA System","authors":"Qi Li, Junping Gao, Xiaoqun Zhao","doi":"10.1109/IWSDA.2007.4408379","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408379","url":null,"abstract":"In this paper, the theory of ZCZ sequence pairs set is presented, and a class of ZCZ sequence pairs sets can be constructed based on perfect autocorrelation sequence pair and orthogonal matrix. Based on the system model presented in this paper, and through simulation on MATLAB platform, the performance of ZCZ sequence pairs in S-CDMA, QS-CDMA and A-CDMA system is analyzed. Compared with Gold sequence, ZCZ sequence pairs set has a long zero-correlation zone, and can be used in QS-CDMA system to obtain better system performance with great number of users.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121891667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Expanded LS Code in MC-DC-CDMA system MC-DC-CDMA系统的LS码扩展
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408349
Jie Shen, De-san Miao, Wei Jiang
{"title":"Expanded LS Code in MC-DC-CDMA system","authors":"Jie Shen, De-san Miao, Wei Jiang","doi":"10.1109/IWSDA.2007.4408349","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408349","url":null,"abstract":"This paper presents a novel multicarrier DS-CDMA scheme based on the loosely synchronous (LS) codes, which can achieve very high spectral efficiency and better performance. We present a method to extend LS code on complex plan, with detail description of its construction, and give proof of some properties on such code. At last, simulation results show that the example code has better performance than 8PSK and 8QAM. In practice, this method can be expanded to construct longer LS code, and further improve system performance.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117088468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Digital Down Converter Based on Walsh Transform for Digital Receiver 基于Walsh变换的数字接收机数字下变频
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408362
Bai Liyun, Wen Bi-yang
{"title":"Digital Down Converter Based on Walsh Transform for Digital Receiver","authors":"Bai Liyun, Wen Bi-yang","doi":"10.1109/IWSDA.2007.4408362","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408362","url":null,"abstract":"A multiplication-free digital clown converter (DDC) based on the Walsh transform for intermediate frequency (IF) digital receiver is presented. The novel structure mainly consists of a fast Walsh transform (FWT) and an inverse fast Walsh transform (IFWT), both of which can be implemented only by addition and subtraction .Since the transform kernel of the FWT and the IFWT are the same, the implementation complexity of the proposed DDC is significantly reduced. Performances illustrative are compared with those of other DDCs, which include convolution operation. Experimental results show that the proposed method outperforms others and is more suited for real time signal processing of software digital down conversion in digital signal processor (DSP).","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123419222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Existence of Multilevel Hadamard Matrices with Odd Order 关于奇阶多阶Hadamard矩阵的存在性
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408339
Q. K. Trinh, P. Fan, E. Gabidulin, R. N. Mohan
{"title":"On the Existence of Multilevel Hadamard Matrices with Odd Order","authors":"Q. K. Trinh, P. Fan, E. Gabidulin, R. N. Mohan","doi":"10.1109/IWSDA.2007.4408339","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408339","url":null,"abstract":"The multilevel (n-ary) Hadamard matrices, which are related to orthogonal matrices or orthogonal designs, are investigated in this paper. It is assumed that all matrix elements are integers, which make the binary Hadamard matrices as special cases of multilevel (n-ary) Hadamard matrices. It is shown that the multilevel Hadamard matrices of odd order do exist if only two different matrix elements are contained; but, except an unknown case, multilevel (n-ary) Hadamard matrices of odd order do not exist when all matrix elements are successive integers.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116210882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A Full Diversity, High Rate Space-time Block Coding Scheme 一种全分集、高速率空时分组编码方案
2007 3rd International Workshop on Signal Design and Its Applications in Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSDA.2007.4408345
Yuwei Zhang, Hongxia Wang, Wei Li
{"title":"A Full Diversity, High Rate Space-time Block Coding Scheme","authors":"Yuwei Zhang, Hongxia Wang, Wei Li","doi":"10.1109/IWSDA.2007.4408345","DOIUrl":"https://doi.org/10.1109/IWSDA.2007.4408345","url":null,"abstract":"A novel space-time block coding (STBC) scheme for four transmit antennas is proposed based on the binary phase shift keying (BPSK) constellation modulation. The new scheme achieves full diversity full rate. And it also can achieve linear decoding at receiver, so the decoding complexity at receiver is greatly reduced. Because the scheme can achieve full diversity, good performance can be obtained not only at low signal to noise ratio (SNR) but also at high SNR. To improve the code rate further, we proposed a space-time spreading code. The space-time spreading code can achieve higher code rate without performance loss.","PeriodicalId":303512,"journal":{"name":"2007 3rd International Workshop on Signal Design and Its Applications in Communications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132056250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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