Spatial modulation (original) (raw)
Spatial modulation is a technique that enables modulation over space, across different antennas (radio) at a transmitter. Unlike multiple-input and multiple-output (MIMO) wireless (where all the transmitting antennas are active and transmitting digital modulated symbols such as phase-shift keying and quadrature amplitude modulation), in spatial modulation, only a single antenna among all transmitting antennas is active and transmitting, while all other remaining transmitting antennas sit idle. The duty of the receiver (information theory) is: to estimate the active antenna index at the transmitter and to decode the symbol sent by the transmitting antenna.
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| dbo:abstract | Spatial modulation is a technique that enables modulation over space, across different antennas (radio) at a transmitter. Unlike multiple-input and multiple-output (MIMO) wireless (where all the transmitting antennas are active and transmitting digital modulated symbols such as phase-shift keying and quadrature amplitude modulation), in spatial modulation, only a single antenna among all transmitting antennas is active and transmitting, while all other remaining transmitting antennas sit idle. The duty of the receiver (information theory) is: to estimate the active antenna index at the transmitter and to decode the symbol sent by the transmitting antenna. Both processes carry a message bit. Since only one transmitting antenna is active at a particular instant, one single RF chain for the active antenna is required, unlike MIMO systems in which NT (number of transmitting antennas) antennas are active and correspondingly NT number of RF chains are required. RF chains are costly, which makes spatial modulation (SM) much cheaper to implement. Conventional MIMO systems suffer from problems such as inter-antenna interference and transmit antenna synchronization issues because all transmitting antennas are active. (en) |
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| dbo:wikiPageRevisionID | 1107104625 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Quadrature_amplitude_modulation dbr:Message dbr:Modulation dbr:M-ary_transmission dbr:Phase-shift_keying dbr:Decoding_(semiotics) dbr:RF_chain dbc:Radio_technology dbc:Radio_resource_management dbr:Receiver_(information_theory) dbr:Bit dbr:Bit_numbering dbc:Optical_communications dbr:Free-space_optical_communication dbr:Information dbr:MIMO dbr:Transmitter dbr:Spectral_efficiency dbr:Antennas_(radio) |
| dbp:wikiPageUsesTemplate | dbt:Reflist |
| dct:subject | dbc:Radio_technology dbc:Radio_resource_management dbc:Optical_communications |
| rdfs:comment | Spatial modulation is a technique that enables modulation over space, across different antennas (radio) at a transmitter. Unlike multiple-input and multiple-output (MIMO) wireless (where all the transmitting antennas are active and transmitting digital modulated symbols such as phase-shift keying and quadrature amplitude modulation), in spatial modulation, only a single antenna among all transmitting antennas is active and transmitting, while all other remaining transmitting antennas sit idle. The duty of the receiver (information theory) is: to estimate the active antenna index at the transmitter and to decode the symbol sent by the transmitting antenna. (en) |
| rdfs:label | Spatial modulation (en) |
| owl:sameAs | wikidata:Spatial modulation https://global.dbpedia.org/id/Fx3GL |
| prov:wasDerivedFrom | wikipedia-en:Spatial_modulation?oldid=1107104625&ns=0 |
| foaf:isPrimaryTopicOf | wikipedia-en:Spatial_modulation |
| is dbo:wikiPageWikiLink of | dbr:Rakhesh_Singh_Kshetrimayum |
| is foaf:primaryTopic of | wikipedia-en:Spatial_modulation |