Digital radio

Digital radio describes radio technologies which carry information as a digital signal. See also software radio for a discussion of radios which use digital signal processing.

Examples of one-way digital radio:
* Digital television broadcasting:
** COFDM
*** DVB
*** ISDB
** 8VSB
*** ATSC
* Digital audio broadcasting:
**Eureka 147 (branded as DAB)
**in-band on-channel
***iBiquity (branded as HD Radio)
***Digital Radio Mondiale (branded as DRM)
* Low-bandwidth digital data broadcasting over existing FM radio:
**Radio Data System (branded as RDS)
* Radio pagers:
** FLEX
** ReFLEX
** POCSAG
** Golay
** NTT
** 5/6-tone

Examples of two-way digital radio:
* Digital cellular telephony:
** GSM
** UMTS (sometimes called W-CDMA)
** TETRA
** IS-95 (cdmaOne)
** IS-136 (D-AMPS, sometimes called TDMA)
** IS-2000 (CDMA2000)
** iDEN
* Wireless networking:
** Wi-Fi
** HIPERLAN
** Bluetooth
** ZigBee
* Military radio systems for Network-centric warfare
** JTRS (Joint Tactical Radio System- a flexible software-defined radio)
** SINCGARS (Single channel ground to air radio system)
* Amateur packet radio:
** AX.25
* Digital modems for HF:
** PACTOR
* Satellite radio:
**Satmodems
* Wireless local loop:
** Basic Exchange Telephone Radio Service
* Broadband wireless access:
** IEEE 802.16

Broadcast flag

In response to the United States Court of Appeals smackdown of the FCC in its broadcast flag regulations, TV content providers like the MPAA have asked for Congress to flag TV content to avoid piracy. Likeiwse RIAA is asking for the same thing when digital radio starts.