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2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications最新文献

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A new M-ary sequence family constructed from Sidel'nikov sequences 从Sidel'nikov序列构造了一个新的M-ary序列族
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5652226
Jung-Soo Chung, Jong-Seon No, Habong Chung
{"title":"A new M-ary sequence family constructed from Sidel'nikov sequences","authors":"Jung-Soo Chung, Jong-Seon No, Habong Chung","doi":"10.1109/ISSSTA.2010.5652226","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5652226","url":null,"abstract":"In this paper, a new family of M-ary sequences of period p<sup>n</sup> −1 is proposed, which has large family size and the good correlation property, that is, the maximum magnitude of their correlation values is upper bounded by 4√p<sup>n</sup> +5.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132219869","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
Finite-SNR diversity-multiplexing trade-off of dual hop relay channels 双跳中继信道的有限信噪比分集复用权衡
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651691
Y. Liu, P. Dharmawansa, M. Mckay, K. Ben Letaief
{"title":"Finite-SNR diversity-multiplexing trade-off of dual hop relay channels","authors":"Y. Liu, P. Dharmawansa, M. Mckay, K. Ben Letaief","doi":"10.1109/ISSSTA.2010.5651691","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651691","url":null,"abstract":"We analyze the diversity-multiplexing trade-off (DMT) of fixed-gain amplify-and-forward (AF) protocols for the dual hop relay channel. Contrary to most prior work, we characterize the finite signal-to-noise ratio (SNR) DMT using a non-asymptotic framework. Our results are based on a new exact closed-form expression which we derive for the distribution of the received SNR, which takes into account the direct transmission link. We also extract the conventional asymptotic DMT as a special case of the finite-SNR result, and demonstrate that the asymptotic DMT can significantly overestimate the level of diversity that is achievable for practical error rates and SNRs. We also present the finite-SNR DMT for decode-and-forward (DF) relaying protocols, and show the interesting result that fixed-gain AF outperforms DF at low SNR.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127827587","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
On the optimal sum capacity for OFDM with on/off power allocation and imperfect channel estimation 基于开关功率分配和不完全信道估计的OFDM最优求和容量研究
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651457
W. Santipach
{"title":"On the optimal sum capacity for OFDM with on/off power allocation and imperfect channel estimation","authors":"W. Santipach","doi":"10.1109/ISSSTA.2010.5651457","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651457","url":null,"abstract":"We consider a point-to-point frequency-selective orthogonal frequency division multiplexing (OFDM) channel. Based on a linear minimum mean square error (MMSE) channel estimates from pilot signals, a receiver determines a set of 'on' or active subchannels that maximizes a lower bound on a sum capacity. The capacity bound optimization is constrained to a fixed total power, which is a sum of total training power and a sum of equal transmission power on activated subchannels. We show that as number of subchannels N increases, the optimal training power converges to a deterministic constant while the optimal number of active subchannels increases at the rate of (log N −2 log log N)2. The associated capacity bound tends to infinity at the rate of log N −2 log log N while that with uniform power allocation of all subchannels converges to a constant.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126074302","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
A construction method of maximum length NFSR sequences based on linear equations 基于线性方程的最大长度NFSR序列构造方法
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651417
D. Yoshioka
{"title":"A construction method of maximum length NFSR sequences based on linear equations","authors":"D. Yoshioka","doi":"10.1109/ISSSTA.2010.5651417","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651417","url":null,"abstract":"In this correspondence, a method of generation of maximum length sequences obtained from nonlinear feedback shift register (NFSRS), which are known as de Bruijn sequences, is proposed. The proposed method produces γ-ary de Bruijn sequences by means of combining several short period sequences generated from linear feedback functions. The number of obtainable de Bruijn sequences by using the proposed method is also examined.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117039885","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
Frequency estimator using Newton's method 使用牛顿方法的频率估计
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651333
T. Kohda, K. Ogiwara, M. Tahir, Abbas Khan, K. Aihara
{"title":"Frequency estimator using Newton's method","authors":"T. Kohda, K. Ogiwara, M. Tahir, Abbas Khan, K. Aihara","doi":"10.1109/ISSSTA.2010.5651333","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651333","url":null,"abstract":"Loop filter-free phase locked loop (PLL) method is proposed for estimating frequency and phase of an incoming wave using the Newton's method and its performance is examined. The arrival wave is multiplied by estimated sine and cosine waves respectively and the resultant are input to integrators. The integrators' outputs are used to provide the simultaneous equations about estimated error of frequency and phase by applying the least squares criterion. These simultaneous equations are nonlinear so Newton's method is used for solving them iteratively. The application of Newton's method provides accurate frequency and phase estimates.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123329400","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
A study on multi-user access in energy detection UWB-IR receiver 能量探测UWB-IR接收机多用户接入研究
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5650539
M. Sasaki, Junpei Ohno, H. Ohno, K. Ohno, M. Itami
{"title":"A study on multi-user access in energy detection UWB-IR receiver","authors":"M. Sasaki, Junpei Ohno, H. Ohno, K. Ohno, M. Itami","doi":"10.1109/ISSSTA.2010.5650539","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5650539","url":null,"abstract":"This paper discusses a multi-user access technique for Ultra-wideband Impulse Radio (UWB-IR) system in energy detection receiver. The UWB-IR system is modulated by On-Off shift Keying (OOK). As multi-users access scheme, the Code Division Multiple Access (CDMA) using the Optical Orthogonal Code (OOC) sequence is adopted. The integral interval and the sample energy threshold value are optimized to improve the Bit Error Rate (BER) performance. The BER performances of proposed scheme are evaluated and compared with conventional energy detection receiver in the low data rate PAN (Personal Area Network) channel. The effect of inter-user interference is improved by using proposed optimization technique.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133743780","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
A novel differentially coherent PN code acquisition detector for DS-CDMA communication systems 一种用于DS-CDMA通信系统的差分相干伪码采集检测器
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651697
T. Tsai, Chih-Hung Lee
{"title":"A novel differentially coherent PN code acquisition detector for DS-CDMA communication systems","authors":"T. Tsai, Chih-Hung Lee","doi":"10.1109/ISSSTA.2010.5651697","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651697","url":null,"abstract":"Code synchronization is a critical step for fast and reliable code search in direct-sequence spread-spectrum (DS-SS) system. In this paper, we propose a novel differentially coherent (DC) detection scheme for rapid code acquisition over a fast Rayleigh fading mobile radio channel with frequency offset, and compare the performance with the conventional I-Q noncoherent detection scheme. Numerical results show that the proposed DC scheme outperforms the conventional I-Q noncoherent scheme.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127882561","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
Frequency division (FD)-based CDMA system which permits frequency offset 基于频分(FD)的CDMA系统，允许频率偏移
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5650056
T. Kohda, Y. Jitsumatsu, Kenjiro Fujino, K. Aihara
{"title":"Frequency division (FD)-based CDMA system which permits frequency offset","authors":"T. Kohda, Y. Jitsumatsu, Kenjiro Fujino, K. Aihara","doi":"10.1109/ISSSTA.2010.5650056","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5650056","url":null,"abstract":"We propose a CDMA system which is regarded as a frequency dual of a chip-asynchronous DS/CDMA system. In such a system, each user's signal may have a frequency offset, i.e. users' carrier frequencies are not synchronised completely. We show that the variance of multiple access interference (MAI) is reduced when frequency offsets are introduced. Such an MAI can be further reduced if we employ Markovian frequency-domain spreading codes.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124379301","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: 6
Trellis ternary coding scheme for 2-D OCDMA system 二维OCDMA系统的栅格三进制编码方案
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651207
Maw-Yang Liu, Zhi-Wei Wang
{"title":"Trellis ternary coding scheme for 2-D OCDMA system","authors":"Maw-Yang Liu, Zhi-Wei Wang","doi":"10.1109/ISSSTA.2010.5651207","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651207","url":null,"abstract":"In this paper, two-dimensional optical CDMA system using trellis ternary coding scheme is investigated. We employ the carrier hopping prime code as signature sequences in time-spreading wavelength-hopping optical CDMA system. As the carrier hopping prime code is a symmetric code, the autocorrelation sidelobes is zero. We apply the orthogonality of this signature sequences to achieve the ternary transmission mechanism. Our proposed architecture is simple in both transmitter and receiver. Since multiple access interference is the major deterioration of system performance, using coding scheme is an effective way to reduce the error floor. The numerical results reveal that our proposed scheme can significantly improve the system performance.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134302608","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
Partial data spreading, an efficient and inexpensive approach to combating frequency selectivity in coded OFDM transmission 部分数据扩展，一种有效而廉价的方法来对抗编码OFDM传输中的频率选择性
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5654012
Shengqiang Guo, P. W. Baier
{"title":"Partial data spreading, an efficient and inexpensive approach to combating frequency selectivity in coded OFDM transmission","authors":"Shengqiang Guo, P. W. Baier","doi":"10.1109/ISSSTA.2010.5654012","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5654012","url":null,"abstract":"Frequency diversity is a proved remedy against the detrimental impact of the frequency selectivity of radio channels. In the case of the channel access scheme OFDM, the obvious and known approach to frequency diversity would consist in commonly spreading the data elements to be transmitted over all OFDM subcarriers. Unfortunately, this approach of full data spreading would render optimum, that is Maximum Likelihood data despreading in the receiver prohibitively expensive so that only less complex suboptimum despreading schemes based on Zero Forcing or on still quite expensive iterative procedures remain. In order to overcome this situation, we propose in the present paper the scheme of partial data spreading. In this scheme the data elements to be transmitted are partitioned into subsets, and the data elements of each of these subsets are commonly spread only over a corresponding subset of the OFDM subcarriers. In this way, optimum data despreading becomes feasible. Our simulation results show that, as compared to un-spread transmission and depending on the characteristics of the radio channel, a significant reduction of the required SNR can be achieved. We consider OFDM transmission with rate 1/2 convolutional coding, QPSK data modulation, and soft input Viterbi decoding.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127481329","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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