Simple AOA signal incoming wave angle calculation system and method thereof

Abstract

The invention discloses a simple AOA signal incoming wave angle calculation system and a method thereof, the simple AOA signal incoming wave angle calculation system comprises a baseband signal processing module and an AOA signal processing module; the baseband signal processing module is connected with the AOA signal processing module; the baseband signal processing module is used for calculating a frequency deviation value of an AOA signal and a multipath channel impulse response numerical value and sending the frequency deviation value and the multipath channel impulse response numerical value to the AOA signal processing module; the AOA signal processing module is used for receiving the frequency deviation value and the multipath channel impulse response value, realizing frequency deviation compensation and multipath compensation of the AOA signals, calculating the phase and frequency f of each compensated AOA signal, and subtracting the phases of the previous antenna and the current antenna at the same moment to obtain a phase difference psi; and the current incoming wave angle theta is calculated according to the phase difference and the frequency. On the premise that the algorithm precision is ensured, the calculation process of the signal angle is greatly simplified, and implementation of the algorithm in the SOC is facilitated.

Description

technical field [0001] The present invention relates to the technical field of designing indoor positioning, and more specifically relates to a simple AOA signal arrival angle calculation system and method thereof. Background technique [0002] As the market demand for indoor positioning continues to expand, more and more technologies are being used in this field, including WIFI positioning technology, Bluetooth positioning technology, radio frequency positioning technology and UWB-based positioning technology. Considering the impact of system architecture cost, Bluetooth and WIFI technologies are widely used in China for the development of indoor positioning systems. In the Bluetooth positioning technology, the precise positioning technology based on the AOA method is more and more widely used. The AOA method generally uses the CAPON algorithm or the MUSIC algorithm to complete the angle calculation of the received signal. The advantages of these algorithms are high calcula...

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Problems solved by technology

[0004] In view of this, the present invention provides a simple AOA signal arrival angle calculation system and its method, the purpose is to solve the problem of large amount of calculation in the existing positioning algorithm, and greatly simplify the signal on the premise of ensuring the accuracy of the algorithm. The calculation process of the angle facilitates the realization of the algorithm in the SOC

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