Rateless codes for advanced architectures

掌上电脑、手机和其他通信(COM)设备已经改变了我们的生活。越来越多的用户希望随时随地都能获得高质量的服务。预计新一代的COM系统除了支持语音和数据等最低限度的服务外，还将支持无线宽带接入和HDTV等应用。频谱既昂贵又有限；然而，对高速率、高质量无线应用的需求正在迅速上升。提高信令效率和改进资源分配方法是随时随地实现快速可靠信息网络的关键。在这一应用中提出的研究位于两个非常活跃和有前途的COM研究方向的交叉点：网络编码和无码率编码。皇后大学的信号设计与分析实验室(SDAL)最近在这两个领域做出了重大贡献，进一步的研究和开发项目正在进行中。此应用程序的重点是开发适当的分析工具，并设计真正可伸缩的COM网络，为大量要求苛刻的用户提供服务。在分布式实用协议的帮助下，使用接收自适应，有望在服务质量、延迟、功率消耗和带宽使用方面有显著改善。该应用接近基于网络编码和无费率信令方案的解决方案。现实的大规模信息网络是需要考虑的。提出了以下研究：i)实用的网络编码方案和资源分配协议，ii)用于噪声信道的新型无码率编码和解码器，以及iii)用于多跳网络的速率和开销最优的无码率/网络编码。这项研究将使加拿大保持在电信技术的前沿。行业和家庭用户将以更好的费率享受访问信息和应用程序的完全移动性，同时消耗更少的电力。这项建议直接涉及至少3名博士、3名硕士和5名BASC学生的培训。由于该项目的及时性和重要性，这些训练有素的学生将成为加拿大高科技行业和学术界的一笔巨大财富。

Handheld computers, cell phones, and other communication (COM) devices have transformed our lives. Increasingly, subscribers expect high-quality access on an 'anywhere-anytime' basis. New generations of COM systems are expected to support applications such as wireless broadband access and HDTV in addition to minimal services such as voice and data. The spectrum is expensive and limited; yet demand for high-rate high-quality wireless applications is rapidly rising. Increasing signaling efficiency and improving resource allocation methods are key to making fast and reliable information networks a reality on an anytime-anywhere basis. The proposed research in this application lies at the intersection of two very active and promising COM research directions: network coding and rateless coding. The signal design and analysis laboratory (SDAL) at Queen's University has recently made major contributions to these two areas and further research and development projects are underway. The focus of this application is to develop proper analytical tools and also design truly scalable COM networks serving large numbers of demanding users. Using receive adaptivity with the aid of decentralized utilitarian protocols, significant improvements in the QoS, delay, power consumption, and bandwidth usage are expected. This application approaches a solution based on network coding and rateless signaling schemes. Realistic large-scale information networks are to be considered. The following studies are proposed: i) practical network coding schemes and resource allocation protocols, ii) novel rateless codes and decoders for noisy channels, and, iii) rate- and overhead-optimal rateless/network codes for multi-hop networks. This research will keep Canada at the forefront of telecom technology. Industry and household subscribers will enjoy full mobility in access to information and applications at better rates while concurrently consuming less power. This proposal directly involves the training of at least 3 PhD, 3 MASc, and 5 BASc students. Due to the timeliness and significance of the proposed project, the highly-trained students will be a great asset to high-tech industry and academia in Canada.