Signal demodulation system, method and computer storage medium for distributed receiver

Abstract

The invention provides a signal demodulation system, method, voltage comparator and computer storage medium of a distributed receiver, including a transmitting end, a remote end and a centralized processing end, the remote end and the centralized processing end are connected by a bidirectional optical fiber, and the remote end is connected by a The antenna receives the high-order modulation signal transmitted by the transmitting end, and converts the electrical signal into an optical signal through a differential electro-optical converter, and transmits it to the centralized processing end. The centralized processing end uses the periodic comparison threshold voltage waveform generated by the comparison threshold to obtain signal data jumps The signal value corresponding to the position is output as a sampling value, which is further converted into a single-bit high-speed signal, and the optical signal is converted into an electrical signal by using a differential electro-optical converter, and finally restored to the original modulated signal by a band-pass filter for transmission. The technical solution of the invention uses the single-bit voltage comparator to virtualize the effect of the multi-bit voltage comparator, realizes demodulation of high-order modulation signals, and is suitable for signal demodulation of high-frequency tuning signals.

Description

【Technical field】 [0001] The invention belongs to the field of signal demodulation, and in particular relates to a signal demodulation system, method, voltage comparator and computer storage medium of a distributed receiver. 【Background technique】 [0002] In digital communication and radar systems, amplitude-phase modulation communication is often used to transmit signals or sense objects. Analog-to-digital signal converters are very important in the system, but analog-to-digital converters often need to be used with digital signal processors and consume a certain amount of power. In distributed multi-antenna communication and radar systems, receivers are often distributed in different locations and interconnected synchronously through optical fibers. The usual practice is to digitize the analog signal through an analog-to-digital signal converter at the receiving antenna end, and convert the digitized Signals are transmitted via optical fibers. [0003] Seiko Epson's U.S....

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Problems solved by technology

[0003] Seiko Epson's U.S. Patent No. US7885359, patent name: Sampling demodulatorfor amplitude shift keying (ASK) radio receiver, this patent discloses a sampling demodulator for amplitude shift keying (ASK) radio receiver, ASK is A relatively simple form of demodulation where the carrier amplitude is varied along with the demodulated signal. Amplitude Shift Keying (ASK) is equivalent to AM in analog signals, although the patent mentions that a single comparator with an adjustable voltage can be used The converter samples the ASK demodulated signal into a binary bit stream, but has no processing capability for the phase modulated signal, thus limiting the available modulation methods

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