Microwave Photonic Modem Techniques for Millimeter Wave Transmitters and Receivers

[0140602]本提案系统地研究了微波光子技术，用于毫米波信号的直接调制、下变频和解调，用于高速无线应用，如远程医疗、多媒体分发、先进的卫星和军事通信。直接调制消除了与多次频率转换相关的杂散发射和滤波要求，从而潜在地增加了调制带宽和更大的载波可调性。光子学的使用为从基带到毫米波频率的直接转换提供了所需的宽带，反之亦然，并提供了显著简化毫米波发射器和接收器架构的潜力。光子发射器和接收器方法也很有吸引力，因为它们在无线传输之前和随后的无线接收之前兼容毫米波信号的低损耗光纤分布。具体来说，微波光子调制/解调（MP-Modem）技术，直接工作在毫米波频率，可以支持接近1gb的数据速率将被开发。这些技术将通过理论、模拟和实验工作相结合的方式进行评估。候选技术将从理论上进行分析，以开发模型来量化关键性能标准，如链路增益，线性度和误码率（BER）。这些模型将在商用微波和系统级模拟软件包中实现，使用最近开发的微波光子系统建模方法。闭环操作的前景MP-Modem技术将演示实验。实验工作将集中在使用商用光子元件的概念验证演示上。利用MP-Modem方法固有的宽带特性的系统级应用也将被确定和研究。这些应用可能包括，但不限于，对超宽带跳频扩频（FHSS）的支持；支持其他宽带调制技术（例如，在多个无线频段同时操作的准正交频分复用（准ofdm））；支持多种调制格式（例如M-ary PSK和M-ary FSK）；并支持多路访问。采用集成光学和/或MEMs等先进技术实现技术的方法也将被探索。从这些研究中获得的知识将应用于开发新型发射器和接收器，以满足新兴高速数字毫米波无线通信的性能要求，同时提供通过传统电子设计技术无法实现的实现简单性和高级功能。

0140602JemisonThis proposal describes a systematic investigation into microwave-photonic techniques for the direct modulation, downconversion, and demodulation of millimeter wave signals for high-speed wireless applications such as telemedicine, multimedia distribution, and advanced satellite and military communications. Direct modulation eliminates the spurious emissions and filtering requirements associated with multiple frequency conversions, resulting in potentially increased modulation bandwidth and greater carrier tuneability. The use of photonics provides the wide bandwidth needed for direct conversion from baseband to millimeter wave frequencies and visa versa and offers the potential to significantly simplify millimeter wave transmitter and receiver architectures. Photonic transmitter and receiver approaches also are attractive since they are compatible with low-loss fiber optic distribution of millimeter wave signals prior to wireless transmission and subsequent to wireless reception.Specifically, microwave-photonic modulation/demodulation (MP-Modem) techniques that work directly at millimeter wave frequencies and can support data rates approaching 1 Gbs will be developed. The techniques will be assessed via a combination of theoretical, simulation, and experimental work. Candidate techniques will be analyzed theoretically to develop models to quantify critical performance criteria such as link gain, linearity, and bit-error-rate (BER). These models will be implemented in commercially available microwave and system-level simulation packages using a recently developed modeling approach for microwave-photonic systems. Closed loop operation of promising MP-Modem techniques will be demonstrated experimentally. The experimental work will focus on proof-of-concept demonstrations using commercially available photonic components. System-level applications that exploit the inherent wideband nature of the MP-Modem approach also will be identified and studied. These applications may include, but are not limited to, support of ultra-wideband frequency hopping spread spectrum (FHSS); support of other wideband modulation techniques (e.g. quasi-orthogonal frequency division multiplexing (quasi-OFDM) by simultaneous operation in multiple wireless bands); support of multiple modulation formats (e.g. M-ary PSK and M-ary FSK); and support of multiple access. Approaches for implementing the techniques using advanced technologies such as integrated optics and/or MEMs also will be explored.The knowledge gained from these investigations will be applied to develop a new class of transmitters and receivers that will meet the performance demands of emerging high-speed digital millimeter-wave wireless communications while providing implementation simplicity and advanced functionality that cannot be achieved via traditional electronic design techniques.