Intrinsically Digital Radios

本质数字收音机

• 批准号: 0523324
• 负责人: Oliver Collins
• 金额: $ 24万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-15 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0523324&HistoricalAwards=false
• 关键词: Intrinsically; Digital; Radios

Topic: Intrinsically Digital RadiosPI: Oliver CollinsProposal: ECS-0523324This integrative systems proposal focuses on building intrinsically digital radios. Most modern radios perform modulation in a DSP, but still require extensive analog hardware. Since analog devices are both big to begin with and will not scale with decreases in VLSI feature sizes, there has been an ongoing effort to realize signal-processing chains that generate the RF waveform directly. The fundamental problems with this approach are the limited accuracy available in high-speed multi-bit digital-to-analog converters (DACs) and the limited computational abilities of digital hardware. This proposal presents a radical new transmitter architecture that eliminates both of these deficiencies. The essential idea is that the branches in the trellis structure representing the modulator can be labeled with binary strings, which can be passed through a filter and then radiated directly. Thus, the entire problem of building high accuracy, high-speed converters is eliminated. These binary strings are generated offline by a list-decoding algorithm and the entire coder/modulator/transmitter is merely a look-up table. It is proposed to develop this idea further and to adapt it to receivers and other applications. Broader Impacts: The proposed research will have substantial broader impact since building higher dynamic range, lower power transmitters and receivers is key to the continued spread of wireless devices. Everything from military radars to structural monitoring systems could benefit. Furthermore, the list decoding approach will have applications beyond wireless communications. This interface is critical in today's digital world both to send and store information. Personal CD players, cellular telephones, high definition TV, computer modems, and deep space communication systems all use analog-to-digital and digital-to-analog conversion blocks. In addition, the project will enrich the department's curriculum and help train students in communication systems and VLSI circuit design.

主题：本质数字无线电ospi：奥利弗柯林斯提案：ecs -0523324这个综合系统提案侧重于构建本质数字无线电。大多数现代无线电在DSP中进行调制，但仍然需要大量的模拟硬件。由于模拟器件一开始就很大，并且不会随着VLSI特征尺寸的减小而扩展，因此一直在努力实现直接产生RF波形的信号处理链。这种方法的基本问题是高速多位数模转换器（dac）的精度有限，数字硬件的计算能力有限。本提案提出了一种全新的发射机架构，消除了这两个缺陷。其基本思想是，栅格结构中表示调制器的分支可以用二进制字符串标记，二进制字符串可以通过滤波器，然后直接辐射。这样，就消除了构建高精度、高速转换器的整个问题。这些二进制字符串是由列表解码算法离线生成的，整个编码器/调制器/发射器仅仅是一个查找表。建议进一步发展这一想法，并使其适应接收机和其他应用。更广泛的影响：由于构建更高动态范围、更低功率的发射器和接收器是无线设备持续传播的关键，因此拟议的研究将产生实质性的更广泛的影响。从军用雷达到结构监测系统，一切都将受益。此外，列表解码方法将具有无线通信以外的应用。在当今的数字世界中，这个接口对于发送和存储信息至关重要。个人CD播放机、移动电话、高清电视、计算机调制解调器和深空通信系统都使用模数转换和数模转换模块。此外，该项目将丰富该部门的课程，并帮助培养学生在通信系统和VLSI电路设计。