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  2. Continuous Tone-Coded Squelch System - Wikipedia

    en.wikipedia.org/wiki/Continuous_Tone-Coded...

    In telecommunications, Continuous Tone-Coded Squelch System or CTCSS is one type of in-band signaling that is used to reduce the annoyance of listening to other users on a shared two-way radio communication channel. It is sometimes referred to as tone squelch or PL for Private Line, a trademark of Motorola. [1]

  3. Radio Data System - Wikipedia

    en.wikipedia.org/wiki/Radio_Data_System

    Radio Data System (RDS) is a communications protocol standard for embedding small amounts of digital information in conventional FM radio broadcasts. RDS standardizes several types of information transmitted, including time , station identification and program information.

  4. MDC-1200 - Wikipedia

    en.wikipedia.org/wiki/MDC-1200

    Many MDC-1200 systems utilize the unit ID option. With each push-to-talk press, the radio sends a data burst identifying the sending radio. Unit IDs are decoded as unique hexadecimal four-digit numbers. Every radio would have a unique four-digit ID, (for example: 0423 or 5990 ).

  5. WSJT (amateur radio software) - Wikipedia

    en.wikipedia.org/wiki/WSJT_(amateur_radio_software)

    Decoding threshold: -24 dB (with a priori decoding) Operational behavior: similar to HF usage of JT9, JT65; Multi-decoder: finds and decodes all FT8 signals in passband; Auto-sequencing after manual start of QSO

  6. Radioteletype - Wikipedia

    en.wikipedia.org/wiki/Radioteletype

    Radioteletype ( RTTY) is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link. Radioteletype evolved from earlier landline teleprinter operations that began in the mid-1800s. [1] The US Navy Department successfully tested printing ...

  7. Code-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Code-division_multiple_access

    Decode sender0 Decode sender1 0 code0 = (1, −1), signal = (0, −2, −2, 0, 2, 0, 2, 0) code1 = (1, 1), signal = (0, −2, −2, 0, 2, 0, 2, 0) 1 decode0 = pattern.vector0 decode1 = pattern.vector1 2 decode0 = ((0, −2), (−2, 0), (2, 0), (2, 0)) · (1, −1) decode1 = ((0, −2), (−2, 0), (2, 0), (2, 0)) · (1, 1) 3

  8. Software-defined radio - Wikipedia

    en.wikipedia.org/wiki/Software-defined_radio

    Software-defined radio ( SDR) is a radio communication system where components that conventionally have been implemented in analog hardware (e.g. mixers, filters, amplifiers, modulators / demodulators, detectors, etc.) are instead implemented by means of software on a computer or embedded system. [1] While the concept of SDR is not new, the ...

  9. High-Efficiency Advanced Audio Coding - Wikipedia

    en.wikipedia.org/wiki/High-Efficiency_Advanced...

    The Nero AAC Codec supports decoding HE and HEv2 AAC. HE-AAC is also used by AOL Radio and Pandora Radio clients to deliver high-fidelity music at low bitrates. iTunes 9.2 and iOS 4 include full decoding of HE-AAC v2 parametric stereo streams.

  10. Digital radio - Wikipedia

    en.wikipedia.org/wiki/Digital_radio

    Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, ...

  11. Audio codec - Wikipedia

    en.wikipedia.org/wiki/Audio_codec

    An audio codec, or audio decoder is a device or computer program capable of encoding or decoding a digital data stream (a codec) that encodes or decodes audio. [1] [2] [3] [4] In software, an audio codec is a computer program implementing an algorithm that compresses and decompresses digital audio data according to a given audio file or ...