АЛГОРИТМ ОБРАБОТКИ ПРОСТРАНСТВЕННО-ВРЕМЕННЫХ СИГНАЛОВ НА ОСНОВЕ СИСТЕМЫ MIMO-OFDM В УСЛОВИЯХ АКТИВНЫХ ПОМЕХ

Abstract

An algorithm for processing space-time signals based on a MIMO-OFDM communicationsystem in the presence of active interference is described. Theoretical calculations are given, thedetection of approaches that often cause the bandwidth of the communication channel when leavinga point source of active interference. The task is relevant in the conditions of dense urban development,as well as the steadily growing need to improve noise immunity and communicationquality without bandwidth coverage. To process information in a MIMO-OFDM system withoutinterference, engineers mainly use the criterion of maximum signal-to-noise ratios, however, in thepresence of active interference, the Wiener criteria. It measures the minimum RMS pilot measurementerror in OFDM. In this case, a signal receipt of a monetary amount, an eigenvector is detected,weight processing is performed, a signal is received that occurs according to the minimumerror criterion. An orthogonal frequency division multiplexing technology with pilot subcarriers isreduced at the receive frequency in frequency and modulation code. Thresholding was found in thedecrypted code, produced by the RMS comparison. The arrival of big money comes from this ownnumber. Pilot-based enumeration searches for the minimum acceptable error. The eigenvector ofthe found signal will be for weight processing. Experiments are carried out to detect a signal in acommunication channel with and without adaptation using the Wiener criterion and the presenceof interference with two types of modulation (QAM-4, BPSK). The results show that the adaptationimproves the BER (bit error rate) state along the entire line of the curve and for all SNRs.The developed algorithm can be used for communication and control systems of unmanned aerialvehicles in the presence of active interference.