Antenna arraying full-spectrum correlated combining system based on broadband signal frequency domain

Abstract

The invention provides an antenna arraying full-spectrum correlated combining system based on a broadband signal frequency domain and aims to provide a frequency domain based arraying system capable of saving hardware computing resources and overcoming phase ambiguity. The technical scheme includes that the antenna arraying full-spectrum correlated combining system is implemented according to that an A / D (analog / digital) module is used for sampling inputted broadband medium-frequency analog signals; obtained digital medium-frequency signals are subjected to sampling clock full-period delay by a delay module according to N antenna signal time delay estimation values fed back by a correlated combining module, then subjected to frequency conversion by a DDC (digital down converter ) module, polyphase decomposition by an analysis module to obtain M falling-rate narrow-band branches with uniform frequency domain ranges, polyphase correlation, time delay estimation and feedback, fractional time delay correction and polyphase combining by a correlated combining module, polyphase synthesis by a synthesis module, and finally are outputted to a demodulation receiver through a DUC (digital up converter) module and a D / A (digital / analog) module. The antenna arraying full-spectrum correlated combining system based on the broadband signal frequency domain solves the problem of phase ambiguity through integer multiples of sampling clock delay and fractional delay compensation.

Description

technical field [0001] The invention relates to an antenna array broadband signal frequency domain full spectrum correlation synthesis system. Background technique [0002] In recent years, antenna array technology has gradually developed along with the human exploration of outer space. The Jet Propulsion Laboratory (JPL) of the United States has conducted a lot of research work on the antenna array technology for the application environment of the Deep Space Network (DSN). Environments where distant bursts of data may be received more frequently. With the deepening of outer space exploration, as the deep space spacecraft is getting farther and farther away from the ground, the signal sent back to the ground becomes weaker and weaker, making the signal-to-noise ratio (SNR) of the signal received by a single antenna become smaller and smaller. lower. The construction and development of deep space measurement, control and communication systems in the future are facing three...

AI Technical Summary

Problems solved by technology

Taking Sumple as an example, assuming that there are N antenna elements, for the time domain method, a complex multiplier of the order of N is required to implement, and a separate wideband correlator needs to be provided for each time domain IF signal. For the frequency domain method method, does not require a separate broadband correlator, but requires N 2 Complex Multiplier of the Order of / 2

The frequency domain method improves the flexibility of utilizing bandwidth resources of wideband signals, but at the same time increases the complexity of software design and hardware resources

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