Abstract: An Advanced Antenna System (AAS) receiver and related methods are provided. According to one aspect an AAS receiver comprises a digital processing block of a Radio Frequency Integrated Circuit (RFIC). The digital processing block comprises an interface for communicating with a Central Unit (CU), and a plurality of Antenna Signal Processing Blocks (ASPBs), each receiving a digitized receive signal from a respective antenna element of an antenna array. Each ASPB comprises one or more receivers, each of which receives and processes the signal from the respective antenna element. Some receivers within the ASPB beamform the respective processed signal to produce one or more data streams to be sent to the CU. Other receivers within the ASPB provide the respective processed signal to a processing block that buffers the processed signal and sends it to the CU at a later time, e.g., when traffic to the CU is relatively lower.

Abstract: A signal filter comprises a plurality of adding elements (21), each of which has first and second inputs and an output and is operable to provide an output signal representative of the sum of a pair of input signals. The filter also includes a plurality of delay line elements (22), each delay line element having an input and an output and being operable to delay transfer of an input signal from the input to the output by a predetermined time period. The adding elements (21) and delay line elements (22) are connected in a series such that the output of each adding elements, except the last adding element in the series, is connected to the first input of the next adding element in the series via an associated delay line element, the output of the last adding element in the series being connected to the first input of the first adding element in the series via a delay line element. The second input of the adding elements are connected to receive respective input signals.