Patent ID: 8045926

Claim:
A front end arrangement of a multi-transceiver system architecture for use in a wireless multiple-input multiple-output spatial multiplexing system, comprising: a first transceiver module and an independently controllable second transceiver module, each of the first and second transceiver modules comprising (i) a respective transceive antenna, (ii) a respective transmit signal processing chain, and (iii) at least one respective receive signal processing chain, each of the signal processing chains being connected to a common baseband processing unit, the baseband processing unit generating the same baseband signal to the transmit signal processing chains; and a built-in feedback arrangement which facilitates at least one of: a measurement of amplitude, timing and phase offsets by a signal measurement and adjustment block integrated into a digital predistortion system in the transmit signal processing chain of the second transceiver module, the offsets being measured between an a radio-frequency (RF) signal generated in the first transceiver module, the signal being coupled via an antenna loop from the transceive antenna of the first transceiver module to the transceive antenna of the second transceiver module, and forwarded to the signal measurement and adjustment block, and the corresponding transmit baseband signal of the RF signal, the transmit baseband signal being generated by the common baseband processing unit and provided to the signal measurement and adjustment block of the second transceiver module, or a measurement of the amplitude, timing and phase offsets by the signal measurement and adjustment block integrated into the digital predistortion system in the transmit signal processing chain of the second transceiver module, the offsets being measured between the RF signal generated in the second transceiver module, the signal being coupled via a reverse antenna loop from transceive antenna of the second transceiver module to the transceive antenna of the first transceiver module, and forwarded to the signal measurement and adjustment block of the first transceiver module, and the transmit baseband signal received from the common baseband unit and provided to the signal measurement and adjustment block of the first transceiver module, wherein the respective integrated signal measurement and adjustment blocks of the digital predistortion systems in the transmit signal processing chains of the first and second transceiver modules are configured to operate at a higher sampling rate and dynamic range than available for the common baseband processing unit.