Prototype of a Dsp-Based Instrument for In-Service Wireless Transmitter Power Measurement

Abstract A prototype of a DSP-based instrument for in-service transmitter power measurements is presented. The instrument implements a signal-selective algorithm for power measurements that is suitable for use in wireless environments, where possible uncontrolled interfering sources are present in the radio channel and are overlapped to the signal emitted by the transmitter under test, possibly in both time and frequency domain. The measurement method exploits the principles of cyclic spectral analysis, which are briefly recalled in the paper. Potentialities, as well as limitations of the prototype use are discussed, and the results of experiments with both modulated and unmodulated interfering sources are presented

An Efficient Pre-Processing Scheme to Enhance Resolution in Band-Pass Signals Acquisition

The paper presents a pre-processing scheme to enhance the resolution of data acquisition systems (DASs) in the presence of band-pass input signals. The proposed solution permits to acquire a seamless data stream with improved resolution and is designed to be efficient in terms of hardware requirements and processing time. In the paper, details on the designed architecture are given, along with an analytical comparison of the resolution improvement achievable with respect to existing techniques. The performance of the solution is assessed through a number of simulative and experimental tests on band-pass signals

An Efficient Pre-Processing Scheme to Enhance Resolution in Band-Pass Signals Acquisition

The paper presents a pre-processing scheme to enhance the resolution of a data acquisition systems (DAS) in presence of band-pass input signals. The proposed solution permits to acquire a seamless data stream with improved resolution and is designed to be efficient in terms of hardware requirements and processing time. In the paper, details on the designed architecture are given, along with an analytical comparison of the resolution improvement achievable with respect to existing techniques. The performance of the solution is assessed through a number of simulative and experimental tests on band-pass signals