Patent ID: 8295372
Filing Date: 2012-10-23
Classification: H04B,H04L

Abstract:
1. A Digital Radio Mondiale (DRM) receiver comprising: an analog-to-digital converter (ADC) configured to sample a received DRM-encoded signal at a first sampling rate; a downsampler configured to downsample the received DRM-encoded signal at a downsampling rate x, where x is an positive integer; a mode identifier coupled to the output of the downsampler, the mode identifier configured to determine a predetermined DRM parameter mode of the received DRM-encoded signal and to output a signal indicative of the determined DRM mode; a demodulator coupled to the downsampler, the demodulator configured to receive and demodulate the downsampled DRM-encoded signal into a plurality of cells, the demodulator further comprising a programmable N-point Fast Fourier Transform (FFT), where N is an integer number equal to a power of two, and N is determined in response to the signal indicative of the determined DRM mode; and wherein the downsampling rate x equals an integer number such that when the first sampling rate is divided by the downsampling rate x, the result equals the integer number N of samples from a useful portion of one OFDM symbol, and wherein N is the integer equal to a power of two.