H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 27/26 (2006.01) H04B 14/00 (2006.01) H04L 1/02 (2006.01) H04L 1/06 (2006.01)
Patent
CA 2415632
A system and method is provided for adaptive orthogonal frequency division multiplexed (OFDM) transmission (ADOT). The system and method includes OFDM processing of information symbols and is configured for transmission and reception of OFDM signals on orthogonally polarized antennas. Further, the system and method of the present invention is adaptable to channel conditions. An ADOT transmit system includes a transmit processor configured for a specific OFDM modulation of incoming data symbols to be transmitted based on channel condition data, and a pair or orthogonally polarized transmission antennas. An ADOT receive system includes a receive processor configured for restoring the transmitted OFDM signals according to a transmission mode employed in the transmit system. Continual measurement of the transmission channel yields channel condition data for use in selecting a particular transmission mode.
L'invention porte sur un système et un procédé de transmission adaptative en polarisation double (ADOT) de signaux par multiplexage fréquentiel orthogonal (OFDM), qui consiste à traiter par OFDM les symboles d'information, et conçu pour émettre et recevoir les signaux OFDM à l'aide d'antennes à polarisation orthogonale et pour s'adapter à l'état des canaux. Le système d'émission ADOT utilise un processeur spécifique modulant en OFDM les symboles de données entrantes à émettre, en fonction de données sur l'état des canaux, ainsi qu'une paire d'antennes émettrices à polarisation orthogonale. Le système de réception ADOT utilise un processeur restaurant les signaux OFDM émis en utilisant le mode de transmission du système d'émission. Une mesure en continu des canaux de transmission fournit des données sur leur état permettant de sélectionner un mode particulier de transmission.
Abu-Dayya Adnan
Hirano Michael R.
Hoole Elliott
Lo Titus
At&t Wireless Services Inc.
Clearwire Legacy Llc
Gowling Lafleur Henderson Llp
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