Invention Grant
- Patent Title: Photonic sigma delta analog-to-digital conversation employing dual heterojunction thyristors
- Patent Title (中): 采用双异质结晶闸管的光子Σ-Δ模数转换对话
-
Application No.: US10602217Application Date: 2003-06-24
-
Publication No.: US07064697B2Publication Date: 2006-06-20
- Inventor: Geoff W. Taylor , Jianhong Cai , Daniel C. Upp
- Applicant: Geoff W. Taylor , Jianhong Cai , Daniel C. Upp
- Applicant Address: US CT Farmington
- Assignee: The University of Connecticut
- Current Assignee: The University of Connecticut
- Current Assignee Address: US CT Farmington
- Agency: Gordon & Jacobson, P.C.
- Main IPC: H03M1/00
- IPC: H03M1/00
Abstract:
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.
Public/Granted literature
- US20040146237A1 Interference cancellation system employing photonic sigma delta modulation and optical true time delay Public/Granted day:2004-07-29
Information query
