Bi-directional ring-bus architecture for CORDIC-based matrix inversion

An apparatus for processing multiple antenna signals comprises:

• a receiver which receives input signals from multiple antennas;
• one or more processing circuits which processes the received input signals into a plurality of input digital signal streams;
• a bi-directional ring bus processing architecture which performs QR decomposition (QRD) based matrix inversion on the plurality of input digital signal streams, wherein the bi-directional ring bus processing architecture comprises:
• a bi-directional ring bus, with a first ring bus having signals flow in a clockwise direction, a second ring bus having signals flow in a counter-clockwise direction;
• an input/output (I/O) controller coupled to the first and the second ring bus, respectively;
• a plurality of processing elements (PE), each of the plurality of PEs is coupled to the first and the second ring bus, respectively, wherein each of the plurality of PEs comprises at least one Coordinate Rotation Digital Computer (CORDIC) core for performing CORDIC iterations on the plurality of input digital signal streams to produce inversed matrix signals.

A matrix computation unit comprises:

• a bi-directional ring bus processing architecture which performs QR decomposition (QRD) based matrix inversion on a plurality of input digital signal streams, wherein the bi-directional ring bus processing architecture comprises:
• a bi-directional ring bus, with a first ring bus having signals flow in a clockwise direction, a second ring bus having signals flow in a counter-clockwise direction;
• an input/output (I/O) controller coupled to the first and the second ring bus, respectively;
• a plurality of processing elements (PE), each of the plurality of PEs is coupled to the first and the second ring bus, respectively, wherein each of the plurality of PEs comprises at least one Coordinate Rotation Digital Computer (CORDIC) core for performing CORDIC iterations on the plurality of input digital signal streams to produce inversed matrix signals.