Implantable uwb-bpsk transmitting system and method based on carrier frequency tracking technology

Abstract

The invention discloses an implantable UWB-BPSK transmitting system and method based on carrier frequency tracking technology. The system includes a wireless power supply receiving and restoring unit, a carrier restoring unit, a first-order Gaussian pulse generating unit, a BPSK modulating unit, a numerically controlled gain power amplifier, ASK non-correlated demodulator and signal attenuator. The present invention adjusts the carrier frequency of the narrowband ASK in vitro modulation signal, thereby realizing the in vitro real-time tracking technology of the carrier frequency in the body; the present invention obtains a UWB-BPSK modulation signal with a spectrum gap by performing BPSK modulation, and uses the spectrum gap to modulate the narrowband ASK The signal uA provides the required spectrum space and frequency range, and can ensure the real-time alignment of the spectrum gap of the UWB‑BPSK signal with the spectrum of the narrowband ASK modulation signal outside the body. While realizing the frequency band and spectrum sharing of UWB signals and narrowband signals, it also It has the characteristics of adjustable system carrier frequency and power spectrum frequency range. The invention can be widely used in the biomedical field.

Description

technical field [0001] The invention relates to the technical field of communication circuits, in particular to an implantable UWB-BPSK transmitting system and method based on carrier frequency tracking technology. Background technique [0002] The rapid development of biomedical microelectronics technology for the purpose of biomedicine has accelerated the research on cutting-edge technology fields such as biological EEG signal acquisition, ECG signal monitoring, epilepsy and spinal injury rehabilitation medicine, and visual restoration. In order to meet the objective needs of long-term real-time monitoring and recording of a large number of neural signals and other bioelectrical behavioral signals, wireless communication methods with low power consumption, high data rate, large bandwidth, and high security that meet the requirements of biological implants have also become the industry's demand. The pursuit of goals. [0003] At present, traditional biomedical research gen...

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Problems solved by technology

[0004] At present, the industry is in the initial research stage of wireless transmission of bioelectrical signals in an implanted environment. A communication method is used in the frequency band to ensure communication quality and security, and to avoid spectrum interference and other phenomena. This method greatly reduces the utilization rate of the spectrum

In addition, this type of implantable device is often powered by an implanted built-in battery, so that the implanted device cannot obtain a long service life, and there are also problems in terms of the volume of the implanted device, chemical pollution of the battery, and biological rejection. There is a problem

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