Blind Channel Equalization for GSM and QAM Wireless Communication Systems

GSM 和 QAM 无线通信系统的盲信道均衡

• 批准号: 9803855
• 负责人: Zhi Ding
• 金额: $ 19.5万
• 依托单位: Auburn University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 1999-03-19
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9803855&HistoricalAwards=false
• 关键词: Blind; Channel; Equalization; GSM; QAM

Rapid technological advances in recent years have made wireless communication an integral part of modern society in this information age. Among several digital cellular systems, GSM is a successful and dominant wireless system in today's market. Because of its potential application in wireless systems, blind equalization has become an important research subject of communication signal processing in recent years. Although a large number of published works propose various blind algorithms, few have dealt with practical wireless cellular systems. Such a lack of practical consideration of actual wireless systems is alarming and frustrating to practitioners. The main objective of this research is to determine effective means to apply blind equalization into GSM and other similar wireless systems. Its importance arises from considerations that (a) exploiting blind equalization criteria may improve the reliability of GSM receivers; (b) future wireless standards can benefit from blind equalization algorithms by reducing training overhead; (c) studies of practical wireless system will help advance the general research on blind equalization. The challenge as well as the application of blind equalization lies in the practical need for communication receivers to equalize unknown channels without the assistance and expense of training sequences. This research will not only study generic algorithms for QAM blind equalization, but also investigate key issues involved in the application of linear and nonlinear blind equalization algorithms in wireless communications.

近年来技术的快速发展使无线通信成为信息时代现代社会不可或缺的一部分。在几种数字蜂窝系统中，GSM是当今市场上成功的和占主导地位的无线系统。由于盲均衡技术在无线通信系统中的潜在应用，近年来已成为通信信号处理领域的一个重要研究课题。虽然大量的出版物提出了各种盲算法，很少有实际的无线蜂窝系统处理。这种缺乏对实际无线系统的实际考虑的情况令从业者感到震惊和沮丧。本研究的主要目的是确定有效的方法，将盲均衡应用到GSM和其他类似的无线系统。它的重要性源于以下考虑：（a）利用盲均衡准则可以提高GSM接收机的可靠性;（B）未来的无线标准可以通过减少训练开销而受益于盲均衡算法;（c）实际无线系统的研究将有助于推进盲均衡的一般研究。盲均衡的挑战和应用在于通信接收机实际需要在没有训练序列的帮助和费用的情况下均衡未知信道。本研究不仅研究QAM盲均衡的一般算法，而且研究线性和非线性盲均衡算法在无线通信中应用的关键问题。