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INFLUENCE OF THE SHAPE OF THE AMPLITUDE-FREQUENCY RESPONSE ON THE CAPACITY OF COMMUNICATION CHANNEL WITH MEMORY USING APSK-N SIGNALS, WHICH IMPLEMENTS THE THEORY OF RESOLUTION TIME
Ilya M. Lerner, Kazan National Research Technical University named after A.N. Tupolev-KAI, Kazan, Russia,
aviap@mail.ru
Abstract
Volume of information transmitted by radio engineering data transmission systems (ReDTS) exponentially increasing from year to year is the immanent feature of modern society. This leads to considerable technical problem of creating new ReDTS since spectral efficiency requirements are also increasing over the years. One of the most effective approaches to solve this problem is the operation in the presence of strong intersymbol interference (ISI) produced by frequency selective channel, including selective systems of ReDTS radio path. However, the implementation of this approach is associated with several difficulties leading to the considerable increase in complexity of the receiver itself along with an increase in the number of interfering symbols. Quite often, this results to problems with practical feasibility of the entire system. Currently, the annual increase in the volume of transmitted information is an integral feature of radio engineering data transmission systems. This fact makes it necessary to search for novel approaches that can significantly increase its capacity. One of these approaches is the construction of wireless communication systems based on the theory of resolution time, which allows quite efficient operation with strong intersymbol interference in the communication channel with memory. Based on the mathematical simulations of such communication systems using multiposition amplitude-phase shift keying signals, ultimate unity capacity estimations are obtained. The criteria to optimize the shape of the amplitude-frequency response of the communication channel and configuration of signal constellation is formulated.
Keywords: capacity estimation, ISI, APSK-N-signals, the theory of resolution time, optimization problem.
References
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138-149. - Lerner, I.M., Il’in G.I., Il’in A.G. (2018), “On the cyclostationarity of APSK-N-signals observed on the output of communication channel with intersymbol interference”, Bulletin of KSTU named after A.N. Tupolev, No.3, pp.107-117.
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Information about author:
Ilya M. Lerner, Associated professor, candidate of physics and mathematics, Kazan National Research Technical University named after A.N. Tupolev-KAI, Department of Radioelectronic and Quantum Devices, Kazan, Russia