IEEE Trans. Inf. Theory最新文献_第5页

Remarks on space-time codes including a new lower bound and an improved code 空时码的注释，包括一个新的下界和一个改进码

IEEE Trans. Inf. Theory Pub Date : 2003-10-01 DOI: 10.1109/TIT.2003.817475

Hsiao-feng Lu, Yuankai Wang, Pavan Kumar, K. Chugg

引用次数: 67

List decoding from erasures: bounds and code constructions 从擦除中解码列表:边界和代码结构

IEEE Trans. Inf. Theory Pub Date : 2001-12-13 DOI: 10.1109/TIT.2003.815776

V. Guruswami

引用次数: 71

Minimum-weight codewords as generators of generalized Reed-Muller codes 作为广义Reed-Muller码生成器的最小权码字

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868484

Peng Ding, J. D. Key

引用次数: 29

Signal design for bandwidth-efficient multiple-access communications based on Eigenvalue optimization 基于特征值优化的带宽高效多址通信信号设计

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868477

T. Guess, M. Varanasi

{"title":"Signal design for bandwidth-efficient multiple-access communications based on Eigenvalue optimization","authors":"T. Guess, M. Varanasi","doi":"10.1109/18.868477","DOIUrl":"https://doi.org/10.1109/18.868477","url":null,"abstract":"Bandwidth-efficient multiple access (BEMA) is a strategy where transmitter pulses are continually designed at the base station and are dynamically allocated to the transmitters via a feedback channel. Such pulses (or \"signature waveforms\") are designed to conserve bandwidth while simultaneously enabling the receiver at the base station to meet a quality-of-service (QoS) specification for each transmitter. The key technical problem in BEMA communication is therefore the design of the transmitter pulses for the base station receiver. In an earlier paper, we presented solutions to this problem that were shown to be superior (in terms of strict bandwidth) to common signaling schemes such as time-, frequency-, and code-division multiple access (TDMA, FDMA, and CDMA). This paper uses the framework developed earlier, but considers strictly time-limited transmitter pulses and the root-mean squared (RMS) bandwidth measure. As in the earlier paper, significant bandwidth savings over the traditional multiple-access strategies are obtained. However, in contrast to the rank-conserving approach, the bandwidth gains of this paper are realized by tailoring the signature waveform design to conserve RMS bandwidth via eigenvalue optimization problems.","PeriodicalId":13250,"journal":{"name":"IEEE Trans. Inf. Theory","volume":"46 1","pages":"2045-2058"},"PeriodicalIF":0.0,"publicationDate":"2000-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87221491","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: 13

First- and second-order characterization of direction dispersion and space selectivity in the radio channel 无线电信道中方向色散和空间选择性的一阶和二阶表征

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868476

B. Fleury

{"title":"First- and second-order characterization of direction dispersion and space selectivity in the radio channel","authors":"B. Fleury","doi":"10.1109/18.868476","DOIUrl":"https://doi.org/10.1109/18.868476","url":null,"abstract":"We present analytical results relating to first- and second-moment characterization of direction dispersion and spatial selectivity in the radio channel as well as to the duality between these two effects. Dispersion in direction can be characterized either by the direction power spectrum or by a family of spatial Doppler power spectra at the reception site. Two measures called the direction spread and the maximum spatial Doppler spread are introduced which describe the extent of channel dispersion in direction and in spatial Doppler frequency, respectively. Both measures are analogous to the delay and Doppler spreads, which are commonly employed to describe the extent of dispersion in delay and Doppler frequency, respectively. The relationships between the two approaches for characterizing spatial dispersion and especially between the direction and maximum spatial Doppler spreads are analytically established. The coherence distance at a certain level summarizes certain features of space selectivity in the radio channel which impact on the performance of communication systems. Two uncertainty relations between the direction spread and the coherence distance as well as between the maximum spatial Doppler spread and the coherence distance express the duality between direction dispersion and space selectivity. These relations are analogous to those established previously between the delay spread and the coherence bandwidth and between the Doppler spread and the coherence time. Examples relevant to mobile communications in the case where the waves propagate only horizontally illustrate the theoretical results. An application of these results to the design of uniform linear antenna arrays is also discussed.","PeriodicalId":13250,"journal":{"name":"IEEE Trans. Inf. Theory","volume":"62 1","pages":"2027-2044"},"PeriodicalIF":0.0,"publicationDate":"2000-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90838710","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: 288

A method for convergence analysis of iterative probabilistic decoding 迭代概率译码的收敛性分析方法

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868493

M. Mihaljević, J. Golic

引用次数: 19

Modulation and coding for the Gaussian collision channel 高斯碰撞信道的调制和编码

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868475

G. Caire, Emilio Leonardi, E. Viterbo

引用次数: 17

Theorems on the variable-length intrinsic randomness 关于变长固有随机性的定理

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868481

T. Han

引用次数: 10

New deterministic interleaver designs for turbo codes turbo码的新型确定性交织器设计

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868474

O. Takeshita, D. Costello

{"title":"New deterministic interleaver designs for turbo codes","authors":"O. Takeshita, D. Costello","doi":"10.1109/18.868474","DOIUrl":"https://doi.org/10.1109/18.868474","url":null,"abstract":"It is well known that an interleaver with random properties, quite often generated by pseudo-random algorithms, is one of the essential building blocks of turbo codes. However, randomly generated interleavers have two major drawbacks: lack of an adequate analysis that guarantees their performance and lack of a compact representation that leads to a simple implementation. We present several new classes of deterministic interleavers of length N, with construction complexity O(N), that permute a sequence of bits with nearly the same statistical distribution as a random interleaver and perform as well as or better than the average of a set of random interleavers. The new classes of deterministic interleavers have a very simple representation based on quadratic congruences and hence have a structure that allows the possibility of analysis as well as a straightforward implementation. Using the new interleavers, a turbo code of length 16384 that is only 0.7 dB away from capacy at a bit-error rate (BER) of 10/sup -5/ is constructed. We also generalize the theory of previously known deterministic interleavers that are based on block interleavers, and we apply this theory to the construction of a nonrandom turbo code of length 16384 with a very regular structure whose performance is only 1.1 dB away from capacity at a BER of 10/sup -5/.","PeriodicalId":13250,"journal":{"name":"IEEE Trans. Inf. Theory","volume":"109 1","pages":"1988-2006"},"PeriodicalIF":0.0,"publicationDate":"2000-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72885202","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: 150

Optimal codes for single-error correction, double-adjacent-error detection 单错误校正，双邻接错误检测的最优代码

IEEE Trans. Inf. Theory Pub Date : 2000-09-01 DOI: 10.1109/18.868489

M. Biberstein, T. Etzion

引用次数: 11