A.A. Malyutin1, M.D. Portnichenko2, A.N. Zyuzin3

1-3 JSC RIE “PROTEK” (Voronezh, Russia)

1-3 protek@protek-vrn.ru

Formulation of the problem. The trend of development of modern systems of noise-tolerant and noise-protected communication over multipath channels implies an increasing use of multi-antenna (MIMO/SIMO) methods in combination with methods of coherent signal processing at reception. This requires an accurate estimation of the impulse response of the communication channel, but its implementation by classical methods, based on the use of only test symbols, significantly reduces the bandwidth. At the same time, purely blind estimation methods are extremely computationally complex and insufficiently accurate, and the known semi-blind estimation options, as a rule, work only in good-quality channels in the absence of powerful interference. Thus, it is advisable to develop algorithms for evaluating a channel of acceptable complexity, which do not require a large proportion of test symbols and are operable in the presence of directional interference.

Purpose. Development of an algorithm for semi-blind estimation of the pulse response of a multipath multi-antenna communication channel in the presence of powerful directional interference, which has an acceptable computational complexity and does not require a significant increase in the specific fraction of test symbols.

Results. An algorithm for semi-blind estimation of the impulse response of a multipath multi-antenna communication channel based on linear prediction of the channel parameters described by the autoregressive model is developed. Modeling of the algorithm has confirmed its effectiveness in conditions typical for communication channels in the DCMV band and in the presence of powerful directional interference.

Practical significance. The developed algorithm makes it possible to use modern efficient methods of transmitting information in multipath multi-antenna communication channels that require accurate estimation of channel parameters, both in conditions of low signal-to-noise ratio and under the influence of directional interference, while having moderate computational complexity and not requiring the introduction of large redundancy in the transmitted data.

Malyutin A.A., Portnichenko M.D., Zyuzin A.N. Semi-blind FIR MIMO/SIMO channel estimation in the presence of powerful directional interference. Radiotekhnika. 2025. V. 89. № 7. P. 118−127. DOI: https://doi.org/10.18127/j00338486-202507-21 (In Russian)

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