2DPSK (Differential Phase Shift Keying) demodulation circuit, demodulation method and wireless signal receiver system

Abstract

The invention provides a 2DPSK (Differential Phase Shift Keying) demodulation circuit, a demodulation method and a wireless signal receiver system. The 2DPSK demodulation circuit comprises an asynchronous shaping circuit, an N-bit shift register, a mathematics threshold decider, a trigger turnover circuit, a synchronous adjustment trigger and a relative code to absolute code circuit, which are connected in sequence. Secondary down frequency conversion used in the 2DPSK wireless signal receiver system is combined with a simple and effective digital demodulation method disclosed by the invention. According to the demodulation method, the demodulation is carried out by using the circuit. The working frequency of the demodulation circuit is reduced. A difficult and complex frequency doubling carrier synchronous tracking circuit or Costas ring circuit is unnecessary, thus the system can be realized by having the advantages of low complexity, low power consumption and high efficiency so that the unit bit energy consumption of a receiving system is reduced obviously.

Description

technical field [0001] The invention relates to the field of implantable bioelectronic technology, in particular to a 2DPSK demodulation method, a demodulation circuit and a wireless signal receiver system based on wireless digital communication technology with low complexity and low power consumption. Background technique [0002] In modern wireless communication systems, modulation and demodulation technology is an essential link, and its performance is related to the performance of the entire communication system. Digital modulation and demodulation technology has been widely used in modern wireless communication systems because of its good anti-noise performance and excellent bit error rate performance. With the development trend of miniaturization, digitalization and large-scale integration of modern communication systems, the market demand for communication systems with low complexity, low power consumption, low cost and good bit error rate performance is increasing, s...

AI Technical Summary

Problems solved by technology

Both of these two related demodulation methods need to obtain a synchronous clock for coherent demodulation, resulting in a complex structure and increased energy consumption, resulting in a large chip area, power consumption, and cost after system integration, and the demodulation chip needs to bear more high operating frequency

Therefore, the traditional PSK coherent demodulation method is not suitable for implantable medical integrated chips, civilian consumer electronics communication fields, family miniaturized medical wireless equipment, etc.

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