Interference analysis and mitigation for digital wireless communication systems

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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.