RSSI corrected wireless sensor network positioning algorithm of self-adaptive environment
A wireless sensor, network positioning technology, applied in network topology, wireless communication, radio wave measurement system and other directions, can solve the problem of RSSI relying on signal transmission loss index, unable to reflect the influence of wireless signal, RSSI value deviation, etc.
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[0031] see figure 1 . In practice, nodes measure RSSI values rather than power. Most of the current wireless transceiver chips have the function of measuring RSSI. For example, the CC2430 / 2431 launched by TI is a radio frequency transceiver conforming to the IEEE802.15.4 standard. According to the relationship curve between the power of the wireless signal received by the module and the RSSI value, it can be found that the RSSI value is proportional to the received power of the wireless signal. Strict linear relationship, it can be considered that RSSI truly reflects the power of the received wireless signal.
[0032] Assuming reference node A 3 Received two other reference nodes nearby, A 1 ,A 2 The RSSI value, according to the RSSI value formula:
[0033] RSSI 13 = - ( ...
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