Energy-saving wireless communication transceiver based on constant modulus signals

Abstract

The invention discloses an energy-saving wireless communication transceiver based on constant modulus signals, comprising a transmitting part and a receiving part. the transmitting part comprises a baseband signal processing unit, a first hard-limiting circuit, a radio-frequency transmitting unit and a transmitting antenna; and the receiving section comprises a receiving antenna, a radio-frequencyreceiving unit, a second hard-limiting circuit and an intermediate frequency signal processing unit. Compared with a conventional transceiver , the invention has the advantages that complexity of thetransceiver is simplified, and the hard-limiting circuit with less energy consumption replaces the ADC and DAC (digital-to-analog/analog-to-digital converters) with more energy consumption, thereby the energy consumption is effectively reduced, the communication performances can meet the requirement, and the manufacturing cost is reduced to a great extend simultaneously.

Description

technical field [0001] The invention relates to a wireless communication transceiver, in particular to an energy-saving wireless communication transceiver based on a constant modulus signal. Background technique [0002] As an important part of communication technology, wireless communication technology is favored because of its advantages of no need for wiring and strong flexibility. In recent years, it has developed rapidly and its application range has become wider and wider. However, in most application fields, wireless communication transceivers have been designed in a conventional transceiver manner, which may not be able to meet specific requirements although the communication performance can be met. For example, in WSN (Wireless Sensor Network), it is usually powered by batteries and is generally difficult to replace. How to use energy efficiently and maximize the network life cycle is an important challenge for sensor networks, rather than blindly pursuing the impro...

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Problems solved by technology

However, this conventional receiving method does not perform matching in units of symbols, but makes a judgment on each codeword before matching, so the benefits of spread spectrum are not fully utilized.

There is also a document entitled "Theoretical and Practical Limits to Sensitivity in IEEE 802.15.4 Receivers" published on the 14th IEEE International Conference on Electronics, Circuits and Systems, (ICECS 2007) in December 2007, which shows that this non-coherent demodulation is related to hard The combination of decision correlation detection will bring 6.6dB sensitivity loss compared with the ideal soft decision correlation method

If the received signal is matched with the waveform template after local spread spectrum, it is necessary to use ADC to sample the received signal, and ADC is also a major energy-consuming device in the receiving channel, and this receiving method also requires complex calculations. , which increases the complexity and energy consumption of the receiver

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