Patent ID: 6218896
Filing Date: 2001-04-17
Classification: G06F,H03J,H04B,H04L,H04N,H04W

Abstract:
A demodulator for demodulating a digitally sampled data burst comprising:a resampling section configured to resample the digitally sampled data burst at a plurality of timing offsets;an evaluation section configured to evaluate the correlation of the resampling performed at the plurality of timing offsets by the resampling section and to determine a timing estimate;a polyphase filter configured to resample the digitally sampled data burst according to the timing estimate determined by the evaluation section and generate resampled data;a frequency estimation section configured to receive the resampled data from the polyphase filter and to determine a frequency offset;a phase estimation section configured to receive the resampled data from the polyphase filter and to determine a phase offset; anda phase/frequency correction section configured to receive the resampled data from the polyphase filter and to adjust the phase and frequency of the A resampled data according to the phase offset determined by the phase estimation section and the frequency offset determined by the frequency estimation section.