Key Technology Research Of Wireless Communication Chip Based On Bluetooth

With the rapid development of wireless communication technology and its expanding in the fields of financial, military and others, the performance requirements of wireless communication technology have dramatically increased. To master the key design technology of wireless communication chip, and improve the performance continuously based on the demand are important to develop Chinese information industry. As a short-range wireless communication technology, Bluetooth provides the secure data connection between the handheld and fixed devices with unparalleled advantages, but the performances of error correction, security and other aspects of Bluetooth are not highlighted, so that the applications in the fields of financial, military are greatly limited. In this paper, we take the Bluetooth technology as a carrier, adopt an idea of "based on Bluetooth, change Bluetooth and exceed Bluetooth", and aim at the key design techniques and methods for baseband, radio frequency (RF) and system-on-chip (SoC) system, research the standard SoC system, enhanced baseband, frequency synthesizer of Bluetooth, and expand the Bluetooth frequency synthesizer for Satellite navigation application, partly master the core technology for wireless communication chip design.Based on the analysis of Bluetooth data link layer protocol, a system architecture of standard Bluetooth baseband is proposed, and link control, data processing, frequency hopping selection and other key modules have been studied to achieve the standard Bluetooth baseband internet protocol (IP); According to the design, integration, and co-simulation of hardware and software for Bluetooth SoC system, the function of Bluetooth data communication is realized, which will be a foundation for the enhanced Bluetooth baseband research.The performance of frequency hopping (FH) sequences based on the advanced encryption standard (AES) algorithm is analyzed, and a FH sequence generator IP is achieved by using optimized AES algorithm structure and low-power technology; A complex error correct mechanism combined forward error correct (FEC) and interleaved code technology is proposed, which reduces the error rate effectively, and improves the performance of against burst errors and multipath effect; Base on the analysis of the continuous variable slope delta (CVSD) algorithm theory and implementation, the pulse code modulation (PCM) and CVSD voice encoding are both integrated in the Bluetooth baseband to improve the quality and flexibility of the Bluetooth voice communication; The enhancing functions of broadcast and piconet nodes expansion are integrated in Bluetooth baseband, and a multi-nodes voice communication scheme is proposed based on Bluetooth piconet; Based on the above improved methods integrated in the enhanced Bluetooth baseband IP, the performance of Bluetooth error correction, security, anti-jamming, and network are increased effectively, which can meet the requirements of short-range communication system in the fields of business, financial and military, and the additional resource overhead and complexity are in the acceptable range.In this paper, the linear model and transfer function of Bluetooth PLL-type frequency synthesizer (PLLFS) are researched firstly, the transient characteristics, loop stability, noise characteristics, and loop filter parameters design method of the frequency synthesizer are analyzed; Then, the system architecture of Bluetooth PLLFS is proposed, the principle of system and modules is analyzed, and the circuit and layout design are realized; Based on the analysis of tuning characteristics of switch-varactor and differential switched-capacitor circuit, a compensation structure for tuning sensitivity is proposed, and based on this proposed structure, a2.4GHz high linearity, low noise LC voltage-controlled oscillator (VCO) and the corresponding frequency synthesizer are realized; The theory and implementation research of Bluetooth PLLFS IP are extended to satellite navigation, and then the design and simulation of satellite navigation frequency synthesizer digital-analog mixed circuit are implemented.Based on the commercial SoC platform and RF module, the standard and enhanced Bluetooth baseband are tested; The digital-analog mixed circuit for Bluetooth frequency synthesizer is simulated; Based on the TSMC0.18μm standard CMOS process, the satellite navigation frequency synthesizer is manufactured and tested, and the results meet the requirements of satellite navigation RF front-end; The proposed high linearity, low noise frequency synthesizer is manufactured and tested, and the results show that this frequency synthesizer can significantly improve the linearity of frequency tuning curves, and the phase noise over the entire tuning range.Although this study has made some innovations and achievements, there are also some shortcomings, which need to be further carried out in the following studies.