Novel phase discriminator for BPSK signal demodulation

Abstract

The invention discloses a novel phase discriminator for BPSK signal demodulation. The circuit comprises a phase selector U1, a phase inverter INV1, a switch MUX1 and an exclusive-OR gate XOR1. In a BPSK modulation mode, a phase of a carrier signal is judged to execute the opposition or not according to a baseband signal which is 0 or 1, the phase of a modulating signal can generate 1800 of the mutation, so the BPSK signal phase discrimination can be difficultly realized by a general clock phase discriminator. The circuit has the advantages that the circuit can be directly used for the phase discrimination of the BPSK carrier signal, a general PLL structure can realize the BPSK signal demodulation by using the provided phase discriminator, and complicated demodulation methods, such as a quadratic loop and a Costas loop, are not needed. In addition, the circuit is simple in structure, and easy to integration. The working speed of the circuit can reach more than GHz of the frequency, andthe power consumption is lower, so the novel phase discriminator has the more flexible and extensive application.

Description

technical field [0001] The invention relates to the technical field of communication circuits in microelectronic technology, in particular to a new phase detector for BPSK signal demodulation, which makes the BPSK signal demodulation circuit simpler and easier to integrate. Background technique [0002] The information in the computer is composed of digital signals of "0" and "1", while the general transmission medium can only transmit analog electrical signals. Therefore, when information needs to be transmitted between two computers, a device must be used to convert the information from digital signals to analog signals, and the process of converting various digital baseband signals into frequency band signals suitable for channel transmission is called modulation. , and the process of restoring the received digital frequency band signal to a digital baseband signal at the receiving end is called demodulation. According to the different parameters of the controlled signal...

AI Technical Summary

Problems solved by technology

[0004] Due to the sudden change of the phase of the BPSK modulation signal, figure 2 The traditional clock signal phase detector shown cannot realize the function of phase detection

The demodulation of BPSK signals often requires complex demodulation circuits, such as the square ring method and the Costas ring method, but the above methods often require a lot of nonlinear processing, and the circuit complexity is high. Therefore, it is more flexible and extensive to design The applied BPSK signal demodulation circuit is very meaningful to the development of the entire communication circuit

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