Algorithm for DRM Signal Recognition in Time Domain and Hardware Realization

This article presents a new algorithm for DRM (digital radio Mondiale) signal recognition. Such an algorithm is useful for fast scanning and classifying broadcast transmission, which is our goal. The algorithm which we have presented in (Ruckay, 2006) works in frequency domain and is based on a processing of spectrum properties. The recognition algorithm presented here works in time domain and takes advantage of signal time structure. The new algorithm is nearly three times faster and its HW demands are evidently smaller in the comparison with the previous one (Ruckay, 2006). A basic introduction into relevant parts of the DRM standard is given and an efficient implementation of the introduced algorithm is described as well. We also provide results of live radio frequency scanning test where our algorithm shows recognition score higher than 90%.