Method of integral estimation of channel state in the multiantenna radio communication systems
DOI:
https://doi.org/10.15587/1729-4061.2018.144085Keywords:
radio communication, neural networks, fuzzy sets, computational complexity, frequency response, pulse responseAbstract
A method of integrated estimation of channel state in multiantenna radio communication systems was developed. The distinguishing feature of the proposed method is estimation for several indicators, namely the bit error probability in the channel, frequency and pulse response of the channel state. After obtaining of the channel estimate for each indicator, a generalized channel state estimate is formed. Formation of the channel state estimate for each of the estimation indicators takes place in a separate layer of the neural network using the apparatus of fuzzy sets after which a generalized estimate is formed at the neural network output. Development of the proposed method was determined by necessity to raise speed of estimation of the channel state in multiantenna radio communication systems at an acceptable computational complexity. According to the results of the study, it has been established that the proposed method makes it possible to increase speed of estimation of channel state in multiantenna systems on average up to 30 % depending on the channel state while accuracy of the channel state estimation decreases by 5‒7 % because of reduced informativeness of estimation (because of using the apparatus of fuzzy sets) and is able to adapt to the signaling situation in the channel by training the neural network. Neural network training takes place on the basis of a training sequence and completes adaptation to the channel state after 10‒12 iterations of training. It is advisable to apply this method in radio stations with a programmable architecture to improve their interference immunity by reducing time for making decision on the channel state.
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Copyright (c) 2018 Svitlana Kalantaievska, Hennadii Pievtsov, Oleksii Kuvshynov, Andrii Shyshatskyi, Serhii Yarosh, Serhiy Gatsenko, Hryhorii Zubrytskyi, Ruslan Zhyvotovskyi, Sergii Petruk, Vitalii Zuiko
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