Pulse compression distance measurement method of star network conforming to IEEE802.15.4 standard

Abstract

The invention provides a pulse compression distance measurement method of a star network conforming to an IEEE802.15.4 standard. The star network conforming to the IEEE802.15.4 standard is configured, the star network comprises a network coordinator PAN and a reduced function device RFD, the network coordinator PAN uses a carrier with collision avoidance and based on time slot to monitor multiple paths of access mechanisms accessing CSMA/CA to carry out channel competition access with the reduced function device RFD, and the distance measurement between the network coordinator PAN and the reduced function device RFD is finished by use of a pulse compression method when finishing data transmission. By adopting the pulse compression distance measurement method provided by the invention, on the basis of retaining the low complexity, low power consumption, low cost and one-to-many communication of the IEEE802.15.4 standard protocol, a pulse compression signal modulation and calculation method is merged at a carrier modulation state, compared with the existing ZigBee communication using the IEEE802.15.4 standard, a remote multi-target distance measurement function is added, higher distance measurement precision is provided, and since the existing related communication chip industry is quite mature, the cost of the technology is much less than that of traditional radars.

Description

technical field [0001] The invention relates to a pulse compression ranging method conforming to IEEE802.15.4 standard star network. Background technique [0002] The 802.15.4 wireless standard is a wireless standard passed by IEEE in May 2003. The wireless technology based on this standard is mainly used in the field of communication. It can make the central coordinator (ie PAN coordinator) and Multiple reduced-function devices (RFD) perform data transmission, and have functions such as channel energy detection (ED), link quality indicator (LQI) and time slot guarantee (GTS), carrier sense (CSMA), etc. at the same time of low power consumption The advantages of the ACK mechanism to ensure reliable transmission are widely used in the fields of furniture automation, toys and health care. There are also some attempts to use the above advantages to apply the one-to-many distance measurement function. However, at present, this standard is mainly used in ZigBee wireless communic...

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Problems solved by technology

1. Publication date: November 3, 2010, Royal Philips Electronics Co., Ltd., patent authorization CN101023632B, "Measurement of transmission time by wiretapping messages in master / slave network and ADHOC network", introduces the use of wiretapping to obtain electronic equipment The method of distance or position information. The application background of this patent is typical ZigBee technology. There is no introduction of the fusion of IEEE802.15.4 standard and pulse compression method. The range that the present invention can achieve

2. Publication date August 29, 2008, TV Broadcasting Co., Ltd., publication number CN102204372A, "Enhanced Indoor Positioning", which introduces how to determine the location of an electronic mobile device in an indoor environment by calculating power and comparing it with a reference quantity Although the current position is also applied to the ranging method under the IEEE802.15.4 standard, its specific implementation is completely different from that of the present invention. The low accuracy of position estimation only based on power is obvious, and this invention is also limited to indoor use

[0004] In summary, the prior art does not disclose a method for integrating the IEEE802.15.4 standard with pulse compression means to perform multi-target ranging in a star network

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