Digital Radio Mondiale

DRM er beskrevet i IEC's standard: IEC 62272-1 Ed. 1: Digital Radio Mondiale (DRM) - Part 1: System Specification.

Ligesom FM har RDS, har DRM også mulighed for data og tekst information. DRM kan også formidle stereo.

I DRM signalet er der mulighed for at sende information om alternative frekvenser for den givne radiostation. Dette kan og er blevet anvendt til at modtageren automatisk anvender den bedste radiostation. DRM informationen kaldes AFS (Automatic Frequency Switching).

Table of contents

1 Se også 2 Eksterne henvisninger 2.1 DRM generelt 2.2 DRM radioteknik 2.3 DRM test 2.4 DRM radioteknik digital afkodning 2.5 DRM's COFDM 2.6 Vejviser

Se også

• digitale radiosystemer, Digital Audio Broadcast, In-Band On-Channel DAB, Eureka 147 DAB System, C-quam am-stereo, radiofoni, radiomodtager.

• hfcc.org: Public Data (Ca. nederst: A04 DRM Transmissions)
• (pdf) DRM - progress on the receiver front
  • Mayah 2010 DRM. DRM2010. This DRM Receiver is the 2nd generation receiver for the Digital Radio Mondiale (DRM) standard
  • Radio Nederlands: Coding Technologies (CT) presented the first, 2G DRM consumer radio, the DRM Receiver 2010. A joint development by CT, Mayah and others, the DRM Receiver 2010 is smaller and less expensive than the first-generation models Citat: "... One other interesting thing worth mentioning is that it has two front ends (one tuned to frequency A while the other front end scans for the best frequency B) which allows for AFS (Automatic Frequency Switching)..."
• A Listeners' Guide to Digital AM (DRM)
• Radio Nederlands: DRM: Test Transmissions & Latest News Citat: "...It states that DRM is an ITU-R Recommendation for all the broadcasting bands spanning 150 kHz to 30 MHz...."
• hard-core-dx: DRM
• DRM - Digital Radio Mondiale - Digital AM radio below 30MHz
• DRM Product Purchases - Important Notes
• Digital Radio Mondiale (DRM)
• Kortbølge stationsdatabase. Kan gratis downloades til privat brug i dBase IV eller rå ASCII tekstformat: The World Top Shortwave Broadcasting Database Citat: "...This ILGRadio Database is now in use by more than 23 000 listeners, living in 139 countries all over the world !!!...". Søg efter "DRM" og/eller "digital" i "REMARKS" søjlen eller databasefeltet, så findes DRM udsendelser og testudsendelser.
• DIGITAL radio mondiale (DRM). A Worldwide initiative to bring AM radio into the digital era Citat: "...531 KHz from Multimedia anstalt Sachsen Anhalt, Burg near Magdeburg (stereo)..."

• Welcome to the DRM™ Software Radio website
• DRM Receiver Modifications
• "Fuglerede" DRM modtager

• EBU: 2003 eval: Digital broadcasting below 30 MHz: DRM - a summary of the field (pdf)

• Open-Source Software Implementation of a DRM-Receiver. Under the GNU General Public License (GPL)
• Dream is a software implementation of a Digital Radio Mondiale (DRM) receiver

• Explaining some of the magic of COFDM, J H Stott (BBC) Citat: "...COFDM is particularly well matched to these applications, since it is very tolerant of the effects of multipath..."
• Coded Orthogonal Frequency Division Multiplexing (COFDM)
• All About OFDM from SSS Online and Pegasus Technologies
• OFDM, VOFDM, COFDM, Orthogonal Frequency Division Multiplexing: tutorials
• OFDM, VOFDM, COFDM, Orthogonal Frequency Division Multiplexing: resources
• COFDM/8-VSB Controversy Archive & Links

• dmoz: Digital Broadcasting

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