Pseudo code iteration acquiring device and acquiring method based on broadband multi-antenna system

Abstract

The invention provides a pseudo code iteration acquiring device based on a broadband multi-antenna system and a pseudo code iteration acquiring method based on the broadband multi-antenna system. The pseudo code iteration acquiring device mainly comprises a maximal-ratio combining module, an iterative decoding module and an information demodulating module. The pseudo code iteration acquiring method comprises the steps of sending transmitting signals to a receiving end by a transmitting antenna, sending the signals received by a plurality of antennas of the receiving end into the maximal-ratio combining module, and combining multiple paths of signals into one path of signals; delivering the combined signals to the iterative decoding module through the maximal-ratio combining module, conducting the iterative decoding on the combined signals to obtain a judgment matrix, obtaining the final vector state and position of a pseudo code by the judgment matrix, recovering local pseudo codes, conducting self-correlation operation on the recovered local pseudo codes and the received signals, comparing the obtained correlation value with a threshold value; and sending the acquired signals to an information demodulating module to obtain the signals of the receiving end. According to the device and the method, the acquiring performance under the low signal to noise ratio is improved obviously, and the acquisition probability of the signals is increased.

Description

technical field [0001] The invention relates to a wideband multiple-input multiple-output (MIMO) system capture device, and also relates to a fast capture method for long pseudo-random sequences. Background technique [0002] In spread spectrum communication, the fast acquisition technology of long pseudocode has important practical significance in some applications that require high real-time performance. For example, in the radio navigation or telemetry of the high-speed carrier using the spread spectrum system, it is necessary to quickly capture the long pseudo code; in addition, in the ground wave navigation using the long pseudo code spread spectrum, it is also proposed Especially when dealing with time-varying sky-wave interference in ground-wave navigation, the fast acquisition of long pseudo-codes is particularly important. However, the fast capture of long pseudocodes has always been a difficult point in spread spectrum communication. The various pseudocode capture...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pseudo-code iterative capture device based on a wideband multi-antenna system that can improve problems such as inability to capture signals and poor performance when the signal-to-noise ratio is very low

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