| 摘要 |
A power-efficient wireless device is equipped with multiple (N) antennas. Each antenna is associated with a transmitter unit and a receiver unit. The wireless device also has processing units used to perform various digital processing tasks. The transmitter units, receiver units, and processing units may be selectively enabled or disabled. In an idle state, the wireless device may enable only a subset (e.g., one) of the N receiver units and one or few processing units for signal detection and acquisition. For active communication, the wireless device may enable N<SUB>tx </SUB>transmitter units for data transmission and/or N<SUB>rx </SUB>receiver units for data reception, where 1>=N<SUB>tx</SUB>>=N and 1>=N<SUB>rx</SUB>>=N. The enabled processing units may also be clocked at a lower frequency whenever data is transmitted or received at a data rate lower than the highest data rate. The wireless device may go to sleep whenever possible to conserve power. |
