Research On Multi-Antenna Signal Detection And Combining Architecture Based On The SUMPLE Algorithms

Multi-Antenna arrays signal combining technology was first used in deep space exploration.It become an important processing technology in the field of communication.The utility model is used for receiving the same signal through multi-antenna arrays.After signal processing techniques such as parameter estimation and compensation,the signal to noise ratio(Abbreviated as SNR)is proved by weighting the signals,which equivalent to increased antenna aperture.Therefore,the multi-antenna arrays combine technology is an effective method to deal with the signals with low SNR.Before the signals are combined at the receiving end,usually need to detect the existence of the signals to guaranteed the combine performance.But the traditional detection method is only aimed at single signal.It is difficult to apply to multi-antenna array signals.At present,the commonly used detection method is to detect each signal separately,finally joint iudgment.But the detection performance of this method is poor,and has poor robustness.Thus,multi-antenna array joint signal detection scheme has become a hot research topic in the field.In this paper,the key technologies of multi-antenna array signals combine are studied,which are arbitrary placement.I study deeply in the light of multi-antenna signals joint detection,signal selection scheme and the combine problem of non uniform array.The main work and innovation are as follows:1.Aiming at In view of the existing parameter estimation of multi antenna signal synthesis error conditions,with two time delay estimation errors were studied,based on the SUMPLE algorithm for uniform and nonuniform array performance synthetic array is analyzed.First of all,the error estimation of two channel time difference is analyzed,and the range of the synthetic parameter estimation error and the signal to noise ratio difference between the two signals are studied under the condition that the gain is 0dB.Then,based on the SUMPLE algorithm,the received signal is relatively high signal-to-noise and low uniform array under the weight distribution are analyzed,and the performance of non uniform array synthesis design simulation experiment is done,for subsequent work laid the foundation.2.Aiming at the problem of multi antenna signal detection,a joint detection algorithm based on SUMPLE algorithm is proposed,which is based on SUMPLE algorithm.On the basis of studying the characteristics of the convergence of the SUMPLE algorithm in the process of synthesis,and combining with the correlation between the multi antenna signals,a joint detection algorithm is proposed.For the traditional detection method,the algorithm proposed in this paper makes full use of the characteristics of the multi antenna signal with the same transmitted signal,and displays a strong correlation at the receiver.The joint detection algorithm has better detection performance,and is closely integrated with the synthesis algorithm.In addition,the algorithm has good detection performance under low SNR,so it is more suitable for the detection of multi antenna signals at low snr.3.Aiming at the problem of the optimization of the weights of the algorithm under the non-uniform arrays.In this paper,an adaptive correction method based on the algorithm is proposed,and the effectiveness of the correction factor to reduce the SNR is analyzed.Theoretical analysis and simulation experiments shows,the amplitude correction algorithm can obviously reduce the magnitude of the SNR.It is helpful to suppress the influence of quality check signal and reduce gain loss.At the same time,the improved algorithm can be applied to the detection of the fault antenna in the antenna arrays.