Reed Solomon identification
.png)
Reed Solomon Identification (RSID) is a digital communication protocol for radio amateurs that makes it possible to automatically identify many digital operating modes and to recognize and set them independently at the receiving end. It was developed by the French radio amateur Patrick Lindecker, callsign F6CTE, mainly for shortwave transmissions . The operating mode is identified by a unique number; these identifications are managed centrally by the author of the protocol.
The identification is sent directly before the actual digital transmission. It takes 1.4 s and has a bandwidth of 172 Hz. It is coded as a Reed-Solomon code , which enables robust transmission with forward error correction even on disturbed connections. The RSID is transmitted in MFSK modulation . Decoding works up to a signal / noise ratio of −16 decibels , i.e. well below the noise level . It is therefore possible that the RSID identifier can be decoded without demodulation of the actual digital signal being successful.
RSID is supported by some radio amateur computer programs, e.g. B. from FLDIGI for Linux and Windows.
