Filter Bank Based Multi-Carrier Systems for Future Broadband Wireless Communications

用于未来宽带无线通信的基于滤波器组的多载波系统

• 批准号: EP/J017655/1
• 负责人: Pei Xiao
• 金额: $ 12.69万
• 依托单位: University of Surrey
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2012
• 资助国家: 英国
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FJ017655%2F1
• 关键词: Filter; Bank; Based; Multi; Carrier

Orthogonal Frequency Division Multiplexing (OFDM) technique has gained increasing popularity in bothwired and wireless communication systems, mainly due to its immunity to multipath fading, which allows for a significantincrease in the transmission rate. By inserting a cyclic prefix (CP) before each transmitted block longer than the lengthof the channel, OFDM effectively transforms a frequency selective channel into a parallel of flat-fading channels. Thisgreatly simplifies both channel estimation and data recovery at receiver. However, these advantages come at the cost of aloss of 10-25% spectral efficiency due to the insertion of CP, and an increased sensitivity to frequency offset and Dopplerspread as well as transmission nonlinearity accentuated by non-constant modulus of OFDM signals. Additionally, dueto the time-varying nature of wireless channels, training sequence needs to be transmitted periodically for the purpose ofchannel estimation. The overhead imposed by training sequence and CP can be up to 50 percent for fast fading channels,causing significant loss of spectral efficiency.In this proposal we aim to tackle these problems with the filter bank based multi-carrier system employing a specialpulse shaping filter called IOTA (isotropic orthogonal transform algorithm) to yield good time and frequency localizationproperties so that inter-symbol interference (ISI) and inter-carrier interference (ICI) are avoided without the use of CP.We also investigate a linearly precoded IOTA system which facilitates blind channel estimation, resulting in a spectrallyefficient multi-carrier system without the transmission of training sequence in addition to the elimination of CP.In order to effectively combat carrier frequency offset and high PAPR problems in the current orthogonal frequency divisionmultiple access (OFDMA) and single carrier frequency division multiple access (SC-FDMA) based uplink communications,we propose a novel multiple access scheme which combines IOTA with low density signature (LDS) technique.The focus of our work will be on the study and utilization of some special properties of IOTA which have been overlookedby others. We aim to leverage these properties in the equalization, decoding and channel estimation design in order toachieve optimal performance and maximum capacity with affordable computational complexity. Our goal is to providetheoretical references and guidelines for successful implementation of IOTA systems for future wireless communications.

正交频施加多路复用（OFDM）技术在有线和无线通信系统中越来越受欢迎，这主要是由于其对多径褪色的免疫力，这使得在传输速率上具有明显的缩写。通过在每个传输块之前插入一个比通道的长度更长的循环前缀（CP），OFDM有效地将频率选择性通道转换为平面倒入通道的平行。这非常简化接收器的通道估计和数据恢复。但是，这些优点是由于CP的插入而以10-25％的频谱效率为代价，并且对频率偏移和多普勒的敏感性提高，以及由OFDM信号的非恒定模量强调的传播非线性。此外，Dueto是无线通道的时变性质，需要定期通过定期传输训练顺序以进行通道估计。 The overhead imposed by training sequence and CP can be up to 50 percent for fast fading channels,causing significant loss of spectral efficiency.In this proposal we aim to tackle these problems with the filter bank based multi-carrier system employing a specialpulse shaping filter called IOTA (isotropic orthogonal transform algorithm) to yield good time and frequency localizationproperties so that inter-symbol interference (ISI) and避免了不使用CP的携带者间干扰（ICI）。我们还调查了一个线性预编码的IOTA系统，该系统促进了盲信估计，从而导致了频谱效率高效的多载体系统，而无需在CP.INFORMATE CP.INFORNE COM频率频率或高频率的频率频率范围内，而无需传输训练序列。除法多重访问（SC-FDMA）基于上行链路通信，我们提出了一种新型的多重访问方案，该方案将IOTA与低密度签名（LDS）技术结合在一起。我们工作的重点将放在研究和利用其他已被其他特殊属性的特殊特性的研究和利用。我们的目标是在均衡，解码和通道估计设计中利用这些属性，以实现最佳性能和最大的能力，具有负担得起的计算复杂性。我们的目标是为未来无线通信的IOTA系统成功实施IOTA系统的提供指南。

项目成果

Radio Resource Allocation for Uplink OFDMA Systems With Finite Symbol Alphabet Inputs

• DOI: 10.1109/tvt.2013.2287809
• 发表时间: 2014-05
• 期刊: IEEE Transactions on Vehicular Technology
• 影响因子: 6.8
• 作者: Mohammed Al-Imari;P. Xiao;M. Imran;R. Tafazolli

Design of isotropic orthogonal transform algorithm-based multicarrier systems with blind channel estimation

• DOI: 10.1049/iet-com.2012.0029
• 发表时间: 2012-11
• 期刊: IET Commun.
• 作者: Jinfeng Du;P. Xiao;Jinsong Wu;Qingchun Chen

Low complexity subcarrier and power allocation algorithm for uplink OFDMA systems

• DOI: 10.1186/1687-1499-2013-98
• 发表时间: 2013-04
• 期刊: EURASIP Journal on Wireless Communications and Networking
• 影响因子: 2.6
• 作者: Mohammed Al-Imari;P. Xiao;M. Imran;R. Tafazolli

Spatial Modulated Multicarrier Sparse Code-Division Multiple Access

• DOI: 10.1109/twc.2019.2947042
• 发表时间: 2020-01
• 期刊: IEEE Transactions on Wireless Communications
• 影响因子: 10.4
• 作者: Yusha Liu;Lie-liang Yang;P. Xiao;H. Haas;L. Hanzo

A Tight Upper Bound for Enhanced DCT-OFDM With Index Modulation

• DOI: 10.1109/tvt.2020.3035183
• 发表时间: 2020-12-01
• 期刊: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
• 影响因子: 6.8
• 作者: Cao, Aijun;Xiao, Lixia;Tafazolli, Rahim
• 通讯作者: Tafazolli, Rahim