Real Time Digital Controller Implementation Using Deterministic Uniformly Weighted Bit Streams

Abstract

The problems associated with traditional real-time digital controllers can be overcome by the proposed controller implementation technique. The power of this technique essentially lies in the use of single-bit streams to represent the analogue signal instead of multi-bit words and requires elementary digital gates for controller implementation. The controllers can thus be implemented on Field Programmable Gate Arrays, FPGAs, or Application Specific integrated circuits, ASICs. The different elements of the bit-stream controller run in parallel and therefore guarantees real operation. Bit-stream controllers for a single-input-single-output, SISO, system have been presented. The design methodology is similar to continuous time controllers and also offers the versatility of digital systems. The inherently parallel nature of this technique also makes it possible to implement controllers for larger and more complex multiple-input-multiple-output, MIMO, systems.