Resumo
FIELD: physics, communication.
SUBSTANCE: invention relates to communication equipment and may be used for transfer of data in an analogue TV frequency band. The method is based on selection of frequency windows in a TV band suitable for use by secondary operators, at the same time frequency windows are selected from a grid of sound bands of analogue TV, for such windows they determine an index of "being non-Gaussian" for a TV signal, and windows are selected with maximum index of "being non-Gaussian", levels of TV signals are measured in selected windows, and the secondary operator signal level is set in each window as 20 dB below the appropriate measured level, afterwards information is sent in selected windows simultaneously with transfer of TV signals, and on the receiving side of the secondary operator a mixture of a TV signal and a secondary operator signal is transferred to intermediate frequency, and its non-linear conversion is performed for suppression of a TV signal, afterwards the transmitted information is identified.
EFFECT: technical result consists in provision of magnetic compatibility of television operators in a single frequency band.
SUBSTANCE: invention relates to communication equipment and may be used for transfer of data in an analogue TV frequency band. The method is based on selection of frequency windows in a TV band suitable for use by secondary operators, at the same time frequency windows are selected from a grid of sound bands of analogue TV, for such windows they determine an index of "being non-Gaussian" for a TV signal, and windows are selected with maximum index of "being non-Gaussian", levels of TV signals are measured in selected windows, and the secondary operator signal level is set in each window as 20 dB below the appropriate measured level, afterwards information is sent in selected windows simultaneously with transfer of TV signals, and on the receiving side of the secondary operator a mixture of a TV signal and a secondary operator signal is transferred to intermediate frequency, and its non-linear conversion is performed for suppression of a TV signal, afterwards the transmitted information is identified.
EFFECT: technical result consists in provision of magnetic compatibility of television operators in a single frequency band.
| Título traduzido da contribuição | METHOD TO TRANSFER DATA IN ANALOGUE TV FREQUENCY BAND: patent of invention |
|---|---|
| Idioma original | Russian |
| Número de patente | 2537972 |
| IPC | H04N 7/00 |
| Data de arquivo | 25/06/2013 |
| Estado da publicação | Published - 10 jan. 2015 |