An apparatus and method for improving the accuracy of the arrival time measurement of wireless ad-hoc communication network

摘要

It is an apparatus and method to improve arrival time between the nodes in the wireless ad hoc network the (TOA) distance measurement. To be specific, the apparatus and methods of the present invention is used to sequence the spreading waveform directly to the chip matched filter and square-root raised cosine pulse shaping, to estimate the distance by creating a raised cosine filter pulse response by the multiplication is. By using this response time when it is in a certain maximum value function, namely to identify the time corresponding to the signal reception time in practice. The method and the apparatus, to create a self-correlation function and a raised cosine filter pulse response based on the received signal. Calculating a peak value of the autocorrelation function based on the quadratic approximation, to correct this by using signal sampling phase offset detected between the peak value and the calculated raised cosine filter pulse response. Then, correct the peak value is calculated and represents the actual reception time of the received signal.