Abstract
Intelligent automatic meter reading and automatic meter management systems that collect, communicate and process data from different meters, i.e. electricity, gas, water, etc, form an important building block of smart and efficient environments. When using power line modems for communications, achieving fast and accurate synchronization is one of the key issues. This paper provides a novel contribution of phase measurements of the power line signal for robust synchronization purposes. Phase calculation is based on an extended Goertzel algorithm providing zero crossing information and reducing the negative effects of noise and disturbances. With relatively small complexity and low implementation costs it assures sufficient accuracy and speed of convergence. Practical realization on a low-cost microprocessor is discussed. The whole solution has been field-tested and measurements proved that it is highly efficient and very suitable for large quantity deployment.
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