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In this article a brief description of a direct conversion receiver is given, sources of affected channels in such a receiver are examined. Practical methods for eliminating of affected channels of a real radio system are proposed.
The article represents the most common frequency detection algorithms and shows the results of comparing Goertzel algorithms operation speed and fast Fourier transform on the 1967VN044 processor. The paper substantiates implementation of Fourier speed transform algorithms for the locomotive radio station codegram decoding.
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