Design And Implementation Of Wireless Body Area Network Soft Baseband

With the development of society, science and technology and the improvement of people’s living standard, health consciousness and health needs of people has constantly improved. In medical terms, people are no longer satisfied with the traditional mode of treatment after disease. People are hoping to have a new pattern to achieve the prevention, early diagnosis, early treatment. Besides, with the arrival of the ageing population, the growing number of elderly, leading to a variety of needs of chronic diseases care. On the other hand, from a technical point of view, with the rapid development of microelectronic, wireless communication, embedded computing, wearable and implantable biological sensor technology, a new technology-body area network has emerged and obtained the fast development.In order to meet the application requirements of wireless body area networks, the IEEE standardization organization founded the IEEE 802.15.6 working group in 2007 November, the aim of the group is to establish a new communication standard which is used in wireless body area network. In 2012 March, the group released the official version of IEEE802.15.6 standard, which defines a new physical layer (PHY)/medium access control layer (MAC) standard. The standard has the features of miniaturization, low power consumption, real time and high safety, short distance wireless communication which are very suitable for the communication around or inside the human body area.This thesis analyzed the characteristics and application scenarios of the 3 physical layer protocol (narrowband, broadband and human communication) which are defined in IEEE 802.15.6 standard. And, according to the characteristics of the 3 physical layer protocol and needs of the project, this thesis design and implemented the narrowband physical layer protocol using C language. Besides, this thesis make a deep analysis of the open source embedded real-time operating system FreeRTOS, and port it to the open source soft core processor OpenRISC, make a deep research of the theory about task management and scheduling, the data transfer and synchronization by the queue and the hardware resource management and memory management of the FreeRTOS. And, implement the receives and demodulates the data according to the narrowband physical layer protocol based on the FreeRTOS. Finally, verified the function of the design in the OR1Ksim OpenRISC simulator and the Altera DE2-115 FPGA development board, the result shows that the design can demodulated the physical layer service data unit(PSDU) in frame data.