Multi-channel high-speed broadband signal analog phase modulation method

Abstract

The invention provides a multi-path high-speed wideband signal analog phase modulation method, which aims at providing an analog phase modulation method with few consumed hardware resources and a variable signal rate. According to the technical scheme, in the multi-path high-speed wideband signal analog phase modulation, a computer controls a programmable gate array chip (FPGA) through a 422 serial port to generate high-speed data for multipath high-speed wideband rate continuously-variable digital signals or spreading modulation signals, the FPGA outputs each path of digital signals to one input end of a vector multiplier, multipath analog modulation signals are inputted to the other input end of the vector multiplier, and the vector multiplier multiplies the above high-speed data and the analog modulation signals to complete two-phase phase modulation and multipath signal code division multiple access modulation; and N paths of inputted modulated carrier signals pass through N paths of vector multipliers to output N paths of analog modulation signals, the analog modulation signals after multipath two-phase modulation are combined into one path of high-speed wideband analog modulation signals via a combiner to be outputted.

Description

technical field [0001] The invention relates to a method for simulating phase modulation of multi-channel high-speed broadband signals, which can be widely used in signal processing fields such as communication, measurement, and instrumentation. Background technique [0002] The ultimate purpose of communication is to transmit information within a certain distance. Although the baseband digital signal can be transmitted directly at a relatively short transmission distance, if it is to be transmitted over a long distance, especially when transmitting over a wireless or optical fiber channel, it must be modulated to move the signal spectrum to a high frequency. transmitted in the channel. In order to transmit digital signals in high-frequency channels with limited bandwidth, carrier modulation must be performed on digital signals. Just like when transmitting analog signals, there are three basic modulation methods for transmitting digital signals: amplitude shift keying (ASK...

AI Technical Summary

Problems solved by technology

As the transmission distance increases, more and more noise accumulates, which seriously deteriorates the transmission quality.

Moreover, multiple DA analog devices are required to directly output multiple analog signals, which increases the cost of hardware design and becomes more complicated.

Moreover, the data can only be processed in the digital domain, and then the DA output becomes an analog signal, and it cannot be directly modulated on the analog signal.

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