Abstract: An adaptive distributed antenna system comprises a control module coupled between multiple base stations, and multiple antenna groups, each of which includes multiple antenna devices each coupled to the control module via a transmission line, and operable to convert an external wireless signal and a transmitting signal from the transmission line respectively into a receiving signal and a signal to be radiated. The control module converts a downlink signal from any base station and the receiving signal from any transmission line respectively into the transmitting signal and an uplink signal. The control module is configured to establish a transmission link between one base station and one antenna device of the antenna groups.

Abstract: A receiver with Inphase-Quadrature (I-Q) imbalance compensation and an I-Q imbalance compensation method thereof are provided. The receiver chooses a first receiving signal which includes a first data and a first noise, as well as a second receiving signal which includes a second data and a second noise from a plurality of receiving signals. The first data have a first positive frequency data and a first negative frequency data, while the second data have a second positive frequency data and a second negative frequency data. The receiver calculates an I-Q imbalance compensation parameter according to the first receiving signal and the second receiving signal, and compensates for a third receiving signal according to the I-Q imbalance compensation parameter. The I-Q imbalance compensation method is applied to the receiver to implement the aforesaid operations.

Abstract: A cooperative apparatus and a frequency synchronization method thereof for use in a wireless network are provided. The wireless network comprises a base station and a subscriber station. The cooperative apparatus retrieves a signal from the base station and calculates a frequency offset between the base station and the cooperative apparatus according to the signal. Accordingly, the cooperative receives a cooperative information from the base station and forwards the cooperative information to the subscriber station based on the frequency offset.