H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 27/34 (2006.01) H04B 7/26 (2006.01) H04L 1/00 (2006.01) H04L 1/08 (2006.01) H04L 1/16 (2006.01) H04L 1/20 (2006.01)
Patent
CA 2110578
A radio system is so designed as to allow each of a pair of transceivers to assess the quality of the link, and to modify the signal constellation accordingly. Each transceiver monitors the quality of the channel by assessing the strength of the received signal, or the bit error rate, or both. The system is specifically adapted to time division duplex (TDD) transmission over fast fading channel. In each block of data, the first bit is a QPSK (4QAM) signal, which indicates which constellation is to be used.
Un système radio est conçu de façon à permettre à chacun d'une paire d'émetteurs-récepteurs d'évaluer la qualité de la liaison, et de modifier en conséquence la constellation du signal. Chaque émetteur-récepteur surveille la qualité du canal en évaluant l'intensité du signal reçu, ou le taux d'erreurs sur les bits, ou les deux. Le système convient spécifiquement à la transmission par duplexage temporel sur un canal à évanouissement rapide. Dans chaque bloc de données, le premier bit est un signal MDPQ (4MAQ) qui indique la constellation devant être utilisée.
Gowling Lafleur Henderson Llp
Research In Motion Limited
LandOfFree
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