Interference analysis and mitigation for digital wireless communication systems

成熟的无线通信系统的性能受到衰落和干扰的限制。这些限制是语音和数据服务降级、频繁掉话以及服务提供商可以容纳的用户数量较少。衰落是由无线电信号的多径传播引起的。干扰是由多个无线用户占用同一信道或通信系统中的收发信机设计不完善引起的。衰落和干扰的缓解将改善无线服务质量，增加用户容量。因此，衰落环境下的干扰研究是一个重要的研究课题。本研究方案针对宽带无线通信系统在衰落环境下的干扰分析和抑制进行研究。主要研究内容包括以下三个方面：(1)实际调制方案在衰落和干扰下的渐近误码率性能分析。(2)开发可用于无线应用的可抑制干扰的近最佳实用接收机。(3)为下一代无线网络开发能够抑制干扰的健壮数据检测方案。期望对干扰在衰落环境中的作用有更好、更深入的了解，从而改进无线通信收发信机的设计。这种改进的设计将使服务提供商能够为更多的用户提供可靠和负担得起的高数据速率无线服务。

Performances of mature wireless communication systems are limited by fading and interference. These limitations are degraded voice and data services, frequent call drops, and smaller number of users that service providers can accommodate. Fading is caused by multipath propagation of radio signals. Interference is caused by multiple wireless users occupying on the same channel or by imperfect transceiver design in communication systems. Mitigation of fading and interference will improve the quality of wireless services and increase the user capacity. Therefore interference study in fading environment is an important research topic. This research proposal addresses the analysis and mitigation of interference in fading environment for broadband wireless communication systems. The study will focus on the following three areas: (1) Asymptotic error rate performance analysis of practical modulation schemes in fading and interference. (2) Development of near-optimal practical receiver capable of interference mitigation for wireless applications. (3) Development of robust data detection scheme capable of interference mitigation for the next generation wireless networks. We expect to obtain better and deeper understanding of the role of interference in fading environment so that we can improve the design of wireless communication transceivers. Such improved design will allow service providers to provide more users with reliable and affordable high data rate wireless services.