ITR/SI: Integrated Design of Broadband Wireless Transceivers

ITR/SI：宽带无线收发器的集成设计

• 批准号: 0121469
• 负责人: Zhi Ding
• 金额: --
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-10-01 至 2007-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0121469&HistoricalAwards=false
• 关键词: ITR; SI; Integrated; Design; Broadband

0121469DingThe imminent commercial deployment of the 3rd generation 3rd wireless communications systems has placed the development of future high rate wireless internet and mobile computing at the top of wireless R&D agenda. Wireless channels are known to be unreliable and volatile. To develop even faster wireless data networks that can serve as the essential last link for both nomadic and highly mobile users, wireless system design may require fundamental changes in approach. To this end, it has been widely recognized that quality-of-serve (QoS) awareness should be introduced to lower network layers through a unified design. Even within the physical layer itself, separate function blocks such as transmit diversity, equalization, and coding must be further integrated to better exploit the available channel bandwidth, antenna diversity, and channel coding in order to compensate for unknown and time-varying channel distortions as well as co-channel interferences. This proposal presents a novel framework for the design integration and VLSI implementation of ARQ based wireless data networks and highlights a number of critical open research issues for investigation along with many highly promising solutions.The proposed project centers on a unified approach to the design integration of ARQ, transmit/receiver diversity, equalization, and channel coding in broadband wireless communication systems. It represents a clear departure from the current transceiver (physical layer) design approach that separately determines and optimizes each individual functionality such as channel coding, coded modulation, and channel equalization. Central to the PIs proposal is the idea to exploit the use of QoS driven hybrid ARQ at both the transmitter and the receiver. This idea represents an important step of design integration based on the network use of hybrid ARQ. The PIs proposal focuses on a specific mechanism facilitated by an ARQ feedback channel to achieve design coordination of physical layer functions of channel equalization/pre-compensation, transmit antenna diversity, (turbo) coding, amid hybrid ARQ. Their proposed approach is very general and is not limited to a specific modulation or network standard. In particular, their research objectives amid tasks includeo Joint optimization of turbo coding, turbo equalization, amid multiuser detection through code awareness based on temporal diversity introduced by hybrid ARQ;o Turbo equalization amid multiuser detection algorithms for transmit diversity with variable rate codes that are exploited by the transmitter amid demodulator;o Broadband spatial turbo equalization combined with H-ARQ diversity utilizing codes of different levels of error protection as well as iteratively decodable multilevel codes;o New type II hybrid ARQ based on integration of parity retransmission, concatenation, Reed-Solomon (RS) outer code, low-density parity check (LDPC) inner code, arid turbo coding.o VLSI design amid implementation of high speed decoders for integrated equalization, LDPC, and RS turbo decoding.o Low complexity two-stage turbo decoding of Reed-Solomon codes through their binary decomposition into binary component codes with relatively small state complexity;Rather than pursuing incremental advances separately in diversity combining, H-ARQ, equalization, and coding, this project presents a new and specific network integration approach that will have a strong impact on the design of future wireless data networks. The VLSI design amid implementation will represent the latest technology for broadband high speed communication systems.

0121469丁第三代无线通信系统的即将商用部署已经将未来高速无线互联网和移动的计算的开发置于无线研发议程的首位。众所周知，无线信道是不可靠和不稳定的。为了开发能够作为游牧和高度移动的用户的基本最后链路的甚至更快的无线数据网络，无线系统设计可能需要方法上的根本改变。为此，人们已经广泛认识到，服务质量（QoS）意识应该通过统一的设计引入到较低的网络层。即使在物理层本身内，也必须进一步集成诸如发射分集、均衡和编码的单独功能块，以更好地利用可用信道带宽、天线分集和信道编码，以便补偿未知的和时变的信道失真以及同信道干扰。该建议提出了一种新的框架的设计集成和基于ARQ的无线数据网络的VLSI实现，并突出了一些关键的开放研究问题的调查沿着许多非常有前途的solutions.The建议的项目集中在一个统一的方法，在宽带无线通信系统中的ARQ，发送/接收分集，均衡和信道编码的设计集成。它代表了对当前收发器（物理层）设计方法的明显偏离，该方法单独确定和优化每个单独的功能，例如信道编码，编码调制和信道均衡。PI提案的核心是在发送器和接收器处利用QoS驱动的混合ARQ的使用的想法。这个想法代表了基于混合ARQ的网络使用的设计集成的重要一步。PI建议集中于由ARQ反馈信道促进的特定机制，以在混合ARQ中实现信道均衡/预补偿、发射天线分集、（turbo）编码的物理层功能的设计协调。他们提出的方法非常通用，不限于特定的调制或网络标准。特别地，他们的研究目标和任务包括：o通过基于混合ARQ引入的时间分集的码感知，在多用户检测中联合优化Turbo编码、Turbo均衡;o在多用户检测算法中的Turbo均衡，用于由发射机和解调器利用的可变速率码的发射分集; o宽带空间turbo均衡与H-ARQ分集相结合，利用不同级别的错误保护码以及可迭代解码的多级码; o基于奇偶重传、级联、里德-所罗门（RS）外码、低密度奇偶校验（LDPC）内码和turbo编码的集成的新型II型混合ARQ。和RS turbo解码。通过将Reed-Solomon码二进制分解为具有相对小的状态复杂度的二进制分量码，对Reed-Solomon码进行低复杂度两级turbo解码;不是在分集合并、H-ARQ、均衡和编码中分别追求渐进式的进步，该项目提出了一种新的和特定的网络集成方法，将对未来无线数据网络的设计产生重大影响。超大规模集成电路设计与实现将代表宽带高速通信系统的最新技术。