Signal determination method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a signal determination method and device, electronic equipment and a storage medium. The method comprises the steps of acquiring a sample signal and a currentreceiving signal; determining a joint probability density function of the sample signal and the current received signal with respect to each parameter to be estimated; determining an expression corresponding to the parameter to be estimated when the joint probability density function obtains a maximum value through a maximum likelihood estimation algorithm; calculating doppler frequency offset andcode delay through a Gauss Newton method, and obtaining a target value of the Doppler frequency offset, a target value of the code delay, a target value of a carrier phase and a target value of a signal amplitude according to an expression corresponding to a parameter to be estimated when a calculation result of the Doppler frequency offset and the code delay meets preset conditions, wherein thetarget value of the Doppler frequency offset, the target value of the code delay, the target value of the carrier phase and the target value of the signal amplitude represent the current received signal. According to the invention, stable tracking of a signal with a small duty ratio is realized.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a signal determination method, device, electronic equipment and storage medium. Background technique [0002] The TC-OFDM (Time&Code Division-Orthogonal Frequency Division Multiplexing) positioning system based on the terrestrial mobile broadcast network multiplexes high-speed data signals and navigation signals in the same spectrum range in order to improve frequency resource utilization. , and transmit TC-OFDM signals through mobile base stations distributed in a cellular form, and determine the received TC-OFDM signals through spread spectrum receivers to realize self-positioning. [0003] Specifically, the TC-OFDM system is used to continuously generate TC-OFDM signals, the continuous TC-OFDM signals are received by the traditional closed-loop tracking loop method through the spread spectrum receiver, and the current receiving TC-OFDM signal is determined by th...

AI Technical Summary

Problems solved by technology

And due to the time-varying nature of the signal, when the time interval between two adjacent positioning signal downlink broadcast time slots is too long (that is, the duty ratio is small), the phase detection value of the previous time slot is used to adjust the local position of the next time slot. There will be errors in the signal, which will increase the probability of losing lock and make it impossible to achieve stable tracking of the signal

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