All Analogue Full-duplex Dual-receiver Radio for Wideband Mm-wave Communications

用于宽带毫米波通信的全模拟全双工双接收器无线电

• 批准号: EP/X041395/1
• 负责人: Dariush Mirshekar
• 金额: $ 72.36万
• 依托单位: University of Essex
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX041395%2F1
• 关键词: Analogue; Full; duplex; Dual; receiver

Smartphones, tablets and laptops are widely used for multi-user video conferencing, watching video and TV, playing video game, downloading/uploading large files and applications. Data exchanged over wireless networks is significantly increasing annually, and hence the data speed needs to be increased with the demand to keep users happy. Radio network designers and spectrum regulators are facing the daunting task of efficient resource planning to meet the growing demand. Considering spectrum limitation, providing ultra-speed wireless systems can only come through some breakthrough technologies. The full-duplex (FD) radio is one technology with the potential to double the speed and if planned at mm-wave bands, it can offer a huge bandwidth.The massive benefits of broadband mm-wave FD in HetNets are well-known including very fast Gbit inter-operation between small cells in wireless networks. The availability of low-cost mm-wave MMIC-based subsystems together with the simple infrastructure setups for FD radios would place broadband mm-wave FD radios ahead of its rival, namely, the complicated low frequency broadband massive multi-input multi-output (MIMO) systems operating in multiple channels. Indeed, the low-cost broadband infra-structure networks based on FD would be very attractive to mobile operators continuously looking for cheap solutions to provide very high-speed communication coverage in complex environments like underground tunnels, large/high-story buildings, and busy densely populated city areas. Indeed, millions of femtocells of wideband mm-wave FD radios can be envisaged to operate worldwide on the mature of the broadband mm-wave FD technology, ensuring substantial revenue (of the order of billions of pounds) for contributors to the technology.A FD radio uses one channel to transceive and hence self-interference (SI) is its major problem. In FD radios, the required SI cancellation (SIC) depends on transmitter power and signal bandwidth. Typically, a SIC of 60 dB to 110 dB is necessary for a reliable FD system. In low frequency FD radios, this large suppression is normally achieved in multiple stages; ie: in antenna system, in receiver front-end, and in baseband with digital signal processing (DSP).Assuming 10% fractional bandwidth, mm-wave carrier frequencies have the potential to modulate fast signals of a few GHz bandwidth; eg: 3 GHz bandwidth becomes available at 30 GHz carrier. For such a wide baseband, the DSP-based SIC cannot be an option, since no miniaturised power conscious DSP unit for implementation in small mobile/fixed devices is available presently to deal with fast signals of a few GHz bandwidth. To remove the DSP constraint, several promising techniques have been proposed to mitigate the SI in mm-wave FD radios, but they are still under research with limited practical results presented so far in the literature.Recently under an EPSRC grant we have developed a new SIC technique free from DSP. Based on this, we demonstrated a narrow band (60 MHz) FD radio at 3.2 GHz microwave carrier. Our demonstrator achieved a total of 81.5 dB SIC at -5.6 dBm transmit power. Our new system owes its digital-free performance to a two-receiver architecture purging the need for the DSP stage. This property is anticipated to be extremely suitable/important for realising all analogue broadband mm-wave FD systems.The novelty of this proposal, distinguishing it from and indeed levitating well above the work in the literature, is unlocking the potential of our new narrow band FD radio architecture to exploit its several advantages including an analogue baseband SIC solution (i.e., free from DSP) and a self-mutipath reflection interference cancellation via a three-port dual antenna system with a high isolation between transmitter and the dual-receiver. In this work we are to put to test our experiences in developing our new dual-receiver microwave FD radio to realise a unique DSP-free broadband mm-wave FD radio.

智能手机、平板电脑和笔记本电脑广泛用于多用户视频会议、观看视频和电视、玩视频游戏、下载/上传大型文件和应用程序。通过无线网络交换的数据每年都在显着增加，因此需要提高数据速度以满足让用户满意的需求。无线电网络设计人员和频谱监管机构面临着高效资源规划以满足不断增长的需求的艰巨任务。考虑到频谱限制，提供超高速无线系统只能通过一些突破性技术来实现。全双工 (FD) 无线电是一种有可能使速度加倍的技术，如果在毫米波频段进行规划，它可以提供巨大的带宽。宽带毫米波 FD 在异构网络中的巨大优势是众所周知的，包括无线网络中小型蜂窝之间非常快速的 Gbit 互操作。基于低成本毫米波 MMIC 的子系统的可用性以及 FD 无线电的简单基础设施设置将使宽带毫米波 FD 无线电领先于其竞争对手，即复杂的低频宽带大规模多输入多输出（ MIMO）系统在多个通道中运行。事实上，基于FD的低成本宽带基础设施网络对于不断寻找廉价解决方案以在地下隧道、大型/高层建筑和繁忙的复杂环境中提供超高速通信覆盖的移动运营商来说非常有吸引力。人口稠密的城市地区。事实上，可以设想在成熟的宽带毫米波 FD 技术的基础上在全球范围内运行数百万个宽带毫米波 FD 无线电毫微微蜂窝基站，从而确保该技术的贡献者获得可观的收入（数十亿英镑）。无线电使用一个通道进行收发，因此自干扰（SI）是其主要问题。在 FD 无线电中，所需的 SI 消除 (SIC) 取决于发射机功率和信号带宽。通常，60 dB 至 110 dB 的 SIC 对于可靠的 FD 系统是必要的。在低频 FD 无线电中，这种大的抑制通常是通过多个阶段来实现的。即：在天线系统、接收器前端以及具有数字信号处理 (DSP) 的基带中。假设分数带宽为 10%，毫米波载波频率有可能调制几 GHz 带宽的快速信号；例如：3 GHz 带宽在 30 GHz 载波上可用。对于如此宽的基带，基于 DSP 的 SIC 不能成为一种选择，因为目前还没有用于小型移动/固定设备中实现的小型化功耗意识 DSP 单元来处理几 GHz 带宽的快速信号。为了消除 DSP 限制，人们提出了几种有前途的技术来减轻毫米波 FD 无线电中的 SI，但它们仍在研究中，迄今为止文献中提出的实际结果有限。最近，在 EPSRC 的资助下，我们开发了一种新的技术无需DSP的SIC技术。在此基础上，我们演示了 3.2 GHz 微波载波的窄带 (60 MHz) FD 无线电。我们的演示器在 -5.6 dBm 发射功率下总共实现了 81.5 dB SIC。我们的新系统将其无数字性能归功于双接收器架构，消除了对 DSP 级的需求。预计该特性对于实现所有模拟宽带毫米波 FD 系统非常适合/重要。该提案的新颖性使其与文献中的工作区分开来，并且实际上远远高于文献中的工作，正在释放我们新窄带的潜力FD 无线电架构充分利用了其多项优势，包括模拟基带 SIC 解决方案（即无需 DSP）以及通过三端口双天线系统实现自多径反射干扰消除，发射器与发送器之间具有高隔离度双接收器。在这项工作中，我们将测试我们开发新型双接收器微波 FD 无线电的经验，以实现独特的无 DSP 宽带毫米波 FD 无线电。