2012 International Waveform Diversity & Design Conference (WDD)最新文献_第2页

Inter-carrier interference self-cancellation for CI/MC-CDMA system CI/MC-CDMA系统载波间干扰自消除

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311284

Xue Li, Ruolin Zhou, Jian Zhang, V. Chakravarthy, Zhiqiang Wu

{"title":"Inter-carrier interference self-cancellation for CI/MC-CDMA system","authors":"Xue Li, Ruolin Zhou, Jian Zhang, V. Chakravarthy, Zhiqiang Wu","doi":"10.1109/WDD.2012.7311284","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311284","url":null,"abstract":"Multi-carrier code division multiple access (MC-CDMA) has been considered as a strong candidate for next generation wireless communication system due to its excellent performance in multi-path fading channel and simple receiver structure. Carrier Interferometry code for MC-CDMA (CI/MC-CDMA) provides better BER performance, less peak to average power ratio (PAPR) and higher design flexibility than conventional MC-CDMA systems employing Hadarmard-Walsh spreading code. However, like all the multi-carrier transmission technologies such as orthogonal frequency division multiplexing (OFDM), the inter-carrier interference (ICI) produced by the frequency offset between the transmitter and receiver local oscillators or by Doppler frequency shift due to high mobility causes significant bit error rate (BER) performance degradation in CI/MC-CDMA system. In this paper, we apply the ICI self-cancellation scheme previously proposed for OFDM system to orthogonal CI/MC-CDMA system to reduce ICI effect and improve BER performance. Unlike the traditional ICI self-cancellation scheme for OFDM which reduces the ICI at the price of lowing the transmission rate and reducing the bandwidth efficiency, we introduce a second set of orthogonal CI codes to maintain the throughput. Simulations of different leveled modulations over AWGN channel and multi-path fading channel confirmed the effectiveness and efficiency of the proposed self-embedded ICI cancellation scheme for CI/MC-CDMA system where significant BER performance gain has been observed when ICI is present.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128125676","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

Performance evaluation of complex spreading MIMO systems in Rayleigh fading and interference 复杂扩频MIMO系统在瑞利衰落和干扰下的性能评价

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311272

Efstathios Mintzias, R. Romero, T. Ha

引用次数: 2

Improved transmitter localization through incorporation of phase information 通过结合相位信息改进发射机定位

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311295

C. Berdanier, Zhiqiang Wu

引用次数: 3

Waveform toolbox for MIMO radar MIMO雷达波形工具箱

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311292

David L. MacPherson, J. Gonnella

引用次数: 0

A distributed object-oriented multi-mission radar waveform design implementation 一个分布式面向对象的多任务雷达波形设计实现

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311254

V. Amuso, Brent Josefiak

引用次数: 6

Arbitrary pulsed radar waveform 任意脉冲雷达波形

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311278

C. Alabaster, E. Hughes

引用次数: 2

Sparsity-based space-time adaptive processing using OFDM radar 基于稀疏性的OFDM雷达空时自适应处理

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311257

S. Sen

{"title":"Sparsity-based space-time adaptive processing using OFDM radar","authors":"S. Sen","doi":"10.1109/WDD.2012.7311257","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311257","url":null,"abstract":"We propose a sparsity-based space-time adaptive processing (STAP) algorithm to detect a slowly-moving target using an orthogonal frequency division multiplexing (OFDM) radar. We observe that the target and interference spectra are inherently sparse in the spatio-temporal domain, and hence we exploit that sparsity to develop an efficient STAP technique. In addition, the use of an OFDM signal increases the frequency diversity of our system, as different scattering centers of a target resonate at different frequencies, and thus improves the target detectability. First, we formulate a realistic sparse-measurement model for an OFDM radar considering both the clutter and jammer as the interfering sources. Then, we show that the optimal STAP-filter weight-vector is equal to the generalized eigenvector corresponding to the minimum generalized eigenvalue of the interference and target covariance matrices. To estimate the target and interference covariance matrices, we apply a residual sparse-recovery technique that enables us to incorporate the partially known support of the sparse vector. Our numerical results demonstrate that the sparsity-based STAP algorithm, with considerably lesser number of secondary data, produces an equivalent performance as the other existing STAP techniques.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129994400","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

Perturbation size and harmonic limitations in affine approximation for time invariant periodicity preservation systems 时不变周期保持系统仿射近似中的微扰大小和谐波限制

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311305

Joshua Martin, C. Baylis, R. Marks, M. Moldovan

引用次数: 3

Unique measurement and modeling of total phase noise in wideband receiver 宽带接收机总相位噪声的独特测量与建模

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311286

T. Guo, Xia Li, J. Pogge, Yu Song, R. Qiu

{"title":"Unique measurement and modeling of total phase noise in wideband receiver","authors":"T. Guo, Xia Li, J. Pogge, Yu Song, R. Qiu","doi":"10.1109/WDD.2012.7311286","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311286","url":null,"abstract":"RF receivers are common in many modern electronic systems such as wideband beamforming and radar systems. Typically a receiver consists of an analog front-end followed by a digitizer. Note that improvement of analog circuits has proven difficult, and the overall receiver performance is usually limited by the analog front-end. Therefore, achieving low-distortion reception is highly desired, especially for wideband receivers. Among all performance degradation contributors, phase noise and jitter are especially troublesome since they cause random errors which are difficult to compensate. Each individual RF device contributes to phase noise, while the analog to digital converter (ADC) tends to effect time jitter. To quantify the system performance, it is desired to know the accumulated effect of individual phase noise sources and jitter. Under linear channel assumption, the total effect of all phase noise and jitter contributions along a channel can be represented by an accumulated phase noise at the ADC's output, called total phase noise. This paper focuses on measuring and modeling the total phase noise relying on unique optimization approaches. In contrast to traditional phase noise measurement that typically relies on hardware, a digital approach is proposed and developed. In particular, a measurement-based phase noise model is created. A modified spectrum fitting technique based on optimization is proposed and examined. It is confirmed that the total phase noise satisfies wide sense stationary (WSS) Gaussian process model.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127649663","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

Robust non-negative matrix factorization for joint spectrum sensing and primary user localization in cognitive radio networks 认知无线电网络中联合频谱感知和主用户定位的鲁棒非负矩阵分解

2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311260

Z. Hu, R. Ranganathan, Changchun Zhang, R. Qiu, M. Bryant, M. Wicks, Lily Li

引用次数: 10