Patent ID: 8391377

Claim:
An active antenna, comprising an antenna dipole array, a transceiver array, and a digital processing unit (DPU), wherein: the antenna dipole array comprises an antenna dipole adapted to perform conversion between an electromagnetic wave signal and a radio frequency (RF) signal; the transceiver array comprises a transceiver adapted to: during signal reception, demodulate the RF signal of the antenna dipole into a first IQ (in-phase and quadrature) analog signal through down-conversion, and output the first IQ analog signal to the DPU; during signal transmission, modulate a second IQ analog signal of the DPU into a second RF signal through up-conversion, and output the second RF signal to the antenna dipole; and the DPU is adapted to: during signal reception, convert the first IQ analog signal into a first IQ digital signal, and perform digital beam forming (DBF) on the first IQ digital signal; during signal transmission, convert a signal of a base band unit (BBU) into a second IQ digital signal through serial/parallel (S/P) conversion, perform crest factor reduction (CFR) on the second IQ digital signal, and perform DBF on the second IQ digital signal that undergoes the CFR processing.