Procedure and circuit for the reception of data packets according to the IEEE 802.15.4 (MSK) standard (Machine-translation by Google Translate, not legally binding)

摘要

Procedure and circuit for the reception of data packets according to the IEEE 802.15.4 (MSK) standard. The present invention consists of a method and its realization in the form of a circuit for the reception of data packets constructed according to the IEEE 802.15.4 standard and in particular the packets that use OQPSK modulation with a shaping pulse whose shape is half a sine cycle (MSK) in the 2.45 GHz band. More specifically, the present invention describes the synchronization of these packets where the synchronization concept comprises chip synchronization, symbol synchronization and frame synchronization. The procedure is based on the use of a digital filter that processes the phase differences obtained from a phase receiver. This filter provides two outputs from which the chip and symbol synchronism is detected simultaneously. (Machine-translation by Google Translate, not legally binding)