Orthogonal frequency-division multiplexingMethod of encoding digital data on multiple carrier frequenciesIn telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital (binary) data on multiple carrier frequencies.
ATSC standardsAdvanced Television Systems Committee (ATSC) standards are an international set of standards for broadcast and digital television transmission over terrestrial, cable and satellite networks. It is largely a replacement for the analog NTSC standard. Like NTSC, ATSC is used mostly in the United States, Mexico, Canada, South Korea, and Trinidad and Tobago.
Signal modulationProcess of varying one or more properties of a periodic waveform Categorization for signal modulation based on data and carrier types Signal modulation is the process of varying one or more properties of a periodic waveform in electronics and telecommunication for the purpose of transmitting information. The process encodes information in the form of a message signal modulated onto a carrier signal to be transmitted.
Quadrature amplitude modulationQuadrature amplitude modulation (QAM) is the name of a family of signal modulation methods widely used in modern telecommunications to transmit information. At its core, it conveys two independent analog signals by changing (modulating) the amplitudes of two differently phased versions of a single carrier wave using amplitude modulation.
Cable televisionCable television is a system for delivering broadcast programming to viewers by radio frequency (RF) signals transmitted through coaxial cable and through fibre-optic cable.Pulse-code modulationPulse-code modulation (PCM) is a method used to digitally represent analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled at uniform intervals, and each sample is quantized to the nearest value within a range of digital steps.
Amplitude-shift keyingAmplitude-shift keying (ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave. For example, if each symbol represents a single bit, then the carrier signal could be transmitted at nominal amplitude when the input value is 1, but transmitted at reduced amplitude or not at all when the input value is 0. MethodAny digital modulation scheme uses a number of distinct signals to represent digital data.Binary numberNumber expressed in the base-2 numeral system A binary number is a number expressed in the base-2 numeral system or binary numeral system, a method for representing numbers that uses only two symbols for the natural numbers: typically 0 (zero) and 1 (one). A binary number may also refer to a rational number that has a finite representation in the binary numeral system, that is, the quotient of an integer by a power of two.
Single-sideband modulationIn radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of signal modulation used to transmit information, such as an audio signal, by radio waves. A refinement of amplitude modulation, it uses transmitterpower and bandwidth more efficiently. Amplitude modulation produces an output signal the bandwidth of which is twice the maximum frequency of the original baseband signal.
OctalBase-8 numeral representation Numeral systems, bits and Gray code hex dec oct 3 2 1 0 step 0hex 00dec 00oct 0 0 0 0 g0 1hex 01dec 01oct 0 0 0 1 h1 2hex 02dec 02oct 0 0 1 0 j3 3hex 03dec 03oct 0 0 1 1 i2 4hex 04dec 04oct 0 1 0 0 n7 5hex 05dec 05oct 0 1 0 1 m6 6hex 06dec 06oct 0 1 1 0 k4 7hex 07dec 07oct 0 1 1 1 l5 8hex 08dec 10oct 1 0 0 0 vF 9hex 09dec 11oct 1 0 0 1 uE Ahex 10dec 12oct 1 0 1 0 sC Bhex 11dec 13oct 1 0 1 1 tD Chex 12dec 14oct 1 1 0 0 o8 Dhex 13dec 15oct 1 1 0 1 p9 Ehex 14dec 16oct 1 1 1 0 rB Fhex 15dec 17oct 1 1 1 1 qA Part of a series onNumeral systems Place-value notation Hindu–Arabic numerals Western Arabic Eastern Arabic Bengali Devanagari Gujarati Gurmukhi Odia Sinhala Tamil Malayalam Telugu Kannada Dzongkha Tibetan Balinese Burmese Javanese Khmer Lao Mongolian Sundanese Thai Other systems History Ancient Babylonian Post-classical Cistercian Mayan Muisca Pentadic Quipu Rumi Contemporary Cherokee Kaktovik (Iñupiaq) By radix/base Common radices/bases 2 3 4 5 6 8 10 11 12 16 20 60 Non-standard radices/bases Bijective (1) Signed-digit (balanced ternary) Mixed (factorial) Negative Complex (2i) Non-integer (φ) Asymmetric Sign-value notation Non-alphabetic Contemporary East Asian Chinese Hokkien Suzhou Japanese Korean Vietnamese Historic East Asian Counting rods Tangut Other non-alphabetic Aegean Attic Aztec Brahmi Chuvash Egyptian Etruscan Kharosthi Prehistoric counting Proto-cuneiform Roman Tally marks Alphabetic Abjad Armenian Alphasyllabic Akṣarapallī Āryabhaṭa Kaṭapayādi Coptic Cyrillic Geʽez Georgian Glagolitic Greek Hebrew List of numeral systemsvte Octal is a numeral system for representing a numeric value as base 8.Sine waveA sine wave, sinusoidal wave, or sinusoid (symbol: ∿) is a periodic wave whose waveform (shape) is the trigonometricsine function. In mechanics, as a linear motion over time, this is simple harmonic motion; as rotation, it corresponds to uniform circular motion. Sine waves occur often in physics, including wind waves, sound waves, and light waves, such as monochromatic radiation.
North AmericaNorth America is a continent in the Northern and Western hemispheres. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the south and west by the Pacific Ocean. North America covers an area of around 24,709,000 square kilometers (9,540,000 square miles), representing approximately 16.5% of Earth's land area and 4.8% of its total surface area.*As an Amazon Associate I earn from qualifying purchases.