Innovative Signal Processing Techniques and Algorithms for Cooperative Wireless Communications

点击翻译按钮获取中文摘要

IMT-Advanced has set forth an impressive array of performance targets for the 4G of wireless cellular systems. Major improvements in capacity, quality-of-service (QoS) and deployment flexibility are sought, including much higher peak data rates and the ability to provide these over larger portions of the cell area. To attain, and eventually surpass these exacting requirements, significant improvements in interference rejection and bandwidth extension will be needed as compared to current 3G systems. To this end, 4G and beyond will favor the use of innovative radio technologies, including: spectrum aggregation, cooperative message relaying and coordinated multipoint (CoMP) transmissions. Within this framework, the long-term objective of the proposed research program is to develop and investigate new cooperative signal processing techniques and algorithms, needed to successfully access additional spectrum and combat radio interference in future generations of wireless networks. With a focus on distributed space-time processing, the short-term goals of the research are articulated around three complementary topics: (1) wideband spectrum sensing; (2) non-regenerative relaying; and (3) distributed CoMP beamforming. We will investigate new cooperative detector structures and spectrum sensing techniques that are robust to uncertainties in channel state information and noise background statistics, allowing multiple terminals to collaborate in the reliable detection of spectrum holes. Our work on non-regenerative relaying will focus on optimal cooperative design of multiple (i.e. parallel) relay transformations and transceiver architectures, and adaptive extensions thereof to allow practical message relaying to/from mobile terminals. Our proposed work on CoMP transmissions aims to investigate new decentralized blind adaptive beamforming strategies for synchronized downlink transmission from multiple base stations to mobile users located near the cell boundaries. This cutting-edge program of research will provide numerous opportunities for HQP training; the main findings will be presented at international conferences and published in highly selective journals.