Interference cancellation system employing photonic sigma delta modulation and optical true time delay

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	Interference cancellation system employing photonic sigma delta modulation and optical true time delay
其他题名	Interference cancellation system employing photonic sigma delta modulation and optical true time delay
	TAYLOR, GEOFF W.; CAI, JIANHONG; UPP, DANIEL C.
	2004-07-29
专利权人	UNIVERSITY OF CONNECTICUT, THE
公开日期	2004-07-29
授权国家	美国
专利类型	发明申请
摘要	Interference caused by the propagation of a transmit signal transmitted from a transmit antenna to a receive antenna is effectively cancelled by an improved signal cancellation system. The system includes an interference cancellation signal generator that generates a time-delayed and amplitude-reduced representation of said transmit signal. A summing stage is operably coupled to the interference cancellation signal generator and the receive antenna. The summing stage subtracts the time-delayed and amplitude-reduced representation of the transmit signal from a receive signal to substantially cancel the interference. The interference cancellation signal generator preferably includes a novel programmable optical delay line that introduces a variable amount of optical delay to an optical signal derived from said transmit signal in addition to a thyristor-based sigma delta modulator that converts samples of the transmit signal to into a digital signal in the optical domain.
其他摘要	通过改进的信号消除系统有效地消除了从发射天线发射到接收天线的发射信号的传播所引起的干扰。该系统包括干扰消除信号发生器，其产生所述发射信号的时间延迟和幅度减小的表示。求和级可操作地耦合到干扰消除信号发生器和接收天线。求和级从接收信号中减去发射信号的时间延迟和幅度减小的表示，以基本上消除干扰。干扰消除信号发生器优选地包括新颖的可编程光学延迟线，除了基于晶闸管的西格玛德尔塔调制器之外，该可编程光学延迟线还向从所述发射信号导出的光学信号引入可变量的光学延迟，该调制器将发射信号的样本转换为光域中的数字信号。
主权项	A system for canceling interference caused by propagation of a transmit signal transmitted from a transmit antenna to a receive antenna, the system comprising: an interference cancellation signal generator that generates a time-delayed and amplitude-reduced representation of said transmit signal; and a summing stage, operably coupled to said interference cancellation signal generator and said receive antenna, that subtracts said time-delayed and amplitude-reduced representation of said transmit signal from a receive signal received at said receive antenna to substantially cancel said interference; wherein said interference cancellation signal generator comprises a programmable optical delay line that introduces a variable amount of optical delay to an optical signal derived from said transmit signal.
申请日期	2003-06-24
专利号	US20040146237A1
专利状态	授权
申请号	US10/602217
公开（公告）号	US20040146237A1
IPC 分类号	H01Q1/52 \| H03M3/02 \| H04B1/52 \| G02B6/26
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/53061
专题	半导体激光器专利数据库
作者单位	UNIVERSITY OF CONNECTICUT, THE
推荐引用方式 GB/T 7714	TAYLOR, GEOFF W.,CAI, JIANHONG,UPP, DANIEL C.. Interference cancellation system employing photonic sigma delta modulation and optical true time delay. US20040146237A1[P]. 2004-07-29.