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  2. Frequency-shift keying - Wikipedia

    en.wikipedia.org/wiki/Frequency-shift_keying

    Minimum frequency-shift keying or minimum-shift keying (MSK) is a particular spectrally efficient form of coherent FSK. In MSK, the difference between the higher and lower frequency is identical to half the bit rate. Consequently, the waveforms that represent a 0 and a 1 bit differ by exactly half a carrier period.

  3. Wikipedia

    en.wikipedia.org/wiki/Shiftkeys

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  4. Amplitude-shift keying - Wikipedia

    en.wikipedia.org/wiki/Amplitude-shift_keying

    OFDM. FDM. Multiplexing. v. t. e. Amplitude-shift keying ( ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave . In an ASK system, a symbol, representing one or more bits, is sent by transmitting a fixed-amplitude carrier wave at a fixed frequency for a specific time duration.

  5. Fix problems signing in to AOL Mail - AOL Help

    help.aol.com/articles/fix-problems-signing-in-to...

    While you'll need to contact your software vendor for specifics to your software, most browsers will allow you a temporary bypass by holding down the Shift key as you click web site links. Additionally, try using the following friendly URLs when accessing AOL Mail: "*.aol.com" "registration.aol.com" "webmail.aol.com"

  6. Amplitude and phase-shift keying - Wikipedia

    en.wikipedia.org/wiki/Amplitude_and_phase-shift...

    Further reading. DVB-Flexible Serially Concatenated Convolutional Turbo Codes with Near-Shannon bound performance for telemetry applications, CCSDS-131.2-O-1.; Xiang, Xingyu; Valenti, Matthew C (2012-10-17).

  7. Minimum-shift keying - Wikipedia

    en.wikipedia.org/wiki/Minimum-shift_keying

    In digital modulation, minimum-shift keying ( MSK) is a type of continuous-phase frequency-shift keying that was developed in the late 1950s by Collins Radio employees Melvin L. Doelz and Earl T. Heald. [1] Similar to OQPSK, MSK is encoded with bits alternating between quadrature components, with the Q component delayed by half the symbol period.

  8. Phase-shift keying - Wikipedia

    en.wikipedia.org/wiki/Phase-shift_keying

    e. Phase-shift keying ( PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency carrier wave. The modulation is accomplished by varying the sine and cosine inputs at a precise time. It is widely used for wireless LANs, RFID and Bluetooth communication. Any digital modulation scheme uses ...

  9. Keystroke logging - Wikipedia

    en.wikipedia.org/wiki/Keystroke_logging

    Keystroke logging. Keystroke logging, often referred to as keylogging or keyboard capturing, is the action of recording (logging) the keys struck on a keyboard, [1] [2] typically covertly, so that a person using the keyboard is unaware that their actions are being monitored. Data can then be retrieved by the person operating the logging program.

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