MIMO-OFDM (original) (raw)
MIMO-OFDM (del inglés Multiple-input, multiple-output; orthogonal frequency-division multiplexing, esto es, 'múltiples entradas y múltiples salidas'; 'multiplexación por división de frecuencias ortogonales') es una norma de interfaz radioeléctrica que permite transmitir múltiples señales simultáneamente sobre un único medio de transmisión, como un cable o el aire. Cada señal viaja con su propio y único rango de frecuencia portadora, el cual es modulado por los datos (sean de texto, voz, vídeo, etc.).
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| dbo:abstract | MIMO-OFDM (del inglés Multiple-input, multiple-output; orthogonal frequency-division multiplexing, esto es, 'múltiples entradas y múltiples salidas'; 'multiplexación por división de frecuencias ortogonales') es una norma de interfaz radioeléctrica que permite transmitir múltiples señales simultáneamente sobre un único medio de transmisión, como un cable o el aire. Cada señal viaja con su propio y único rango de frecuencia portadora, el cual es modulado por los datos (sean de texto, voz, vídeo, etc.). OFDM distribuye el dato sobre un largo número de portadores que son espaciados en precisas frecuencias. Este espaciado provee la “ortogonalidad” en esta técnica evitando así que el demodulador vea frecuencias que no son las suyas. MIMO (múltiples entradas y múltiples salidas) es una técnica que emplea múltiples antenas tanto para la recepción como para la transmisión. (es) Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is the dominant air interface for 4G and 5G broadband wireless communications. It combines multiple-input, multiple-output (MIMO) technology, which multiplies capacity by transmitting different signals over multiple antennas, and orthogonal frequency-division multiplexing (OFDM), which divides a radio channel into a large number of closely spaced subchannels to provide more reliable communications at high speeds. Research conducted during the mid-1990s showed that while MIMO can be used with other popular air interfaces such as time-division multiple access (TDMA) and code-division multiple access (CDMA), the combination of MIMO and OFDM is most practical at higher data rates. MIMO-OFDM is the foundation for most advanced wireless local area network (wireless LAN) and mobile broadband network standards because it achieves the greatest spectral efficiency and, therefore, delivers the highest capacity and data throughput. Greg Raleigh invented MIMO in 1996 when he showed that different data streams could be transmitted at the same time on the same frequency by taking advantage of the fact that signals transmitted through space bounce off objects (such as the ground) and take multiple paths to the receiver. That is, by using multiple antennas and precoding the data, different data streams could be sent over different paths. Raleigh suggested and later proved that the processing required by MIMO at higher speeds would be most manageable using OFDM modulation, because OFDM converts a high-speed data channel into a number of parallel lower-speed channels. (en) |
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| rdfs:comment | MIMO-OFDM (del inglés Multiple-input, multiple-output; orthogonal frequency-division multiplexing, esto es, 'múltiples entradas y múltiples salidas'; 'multiplexación por división de frecuencias ortogonales') es una norma de interfaz radioeléctrica que permite transmitir múltiples señales simultáneamente sobre un único medio de transmisión, como un cable o el aire. Cada señal viaja con su propio y único rango de frecuencia portadora, el cual es modulado por los datos (sean de texto, voz, vídeo, etc.). (es) Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is the dominant air interface for 4G and 5G broadband wireless communications. It combines multiple-input, multiple-output (MIMO) technology, which multiplies capacity by transmitting different signals over multiple antennas, and orthogonal frequency-division multiplexing (OFDM), which divides a radio channel into a large number of closely spaced subchannels to provide more reliable communications at high speeds. Research conducted during the mid-1990s showed that while MIMO can be used with other popular air interfaces such as time-division multiple access (TDMA) and code-division multiple access (CDMA), the combination of MIMO and OFDM is most practical at higher data rates. (en) |
| rdfs:label | MIMO-OFDM (es) MIMO-OFDM (en) |
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