Synchronization of sampling in distributed signal processing systems

Abstract

In distributed signal processing systems, every node samples analog signals by its own AD converter. Sampling is controlled by autonomous clocks, that are generally not synchronizable. In order to ensure synchronized operation among the different nodes of the distributed system, both the drift of these clocks, and the jitter of the sampling is handled. This problem is investigated in this paper, and signal processing methods are proposed to guarantee the synchronized operation and to reduce the effect of the jitter. The proposed solution is based on low-level interpolation and resampling of the sampled signals. A realization of this method is demonstrated on a test-system.