Timing and carrier recovery in tdma without preamable sequence

Details Timing and carrier recovery in tdma without preamable sequence Timing and carrier recovery in tdma without preamable sequence

H - Electricity

04

J

363/17

H04J 3/16 (2006.01) H04L 7/02 (2006.01) H04L 27/227 (2006.01) H04L 27/233 (2006.01) H04L 7/027 (2006.01) H04L 27/00 (2006.01)

Patent

CA 1288878

TIMING AND CARRIER RECOVERY IN TDMA WITHOUT PREAMBLE SEQUENCE Abstract of the Invention The present invention provides a method of detecting the clock rate and recovering the carrier in a TDMA (time division multiple access) signal. The quadrature baseband components are stored for a predetermined amount of time as sampled data and the clock rate error of the baseband samples are estimated. The clock phase of the baseband samples are corrected from the estimated clock phase error by using interpolation over the sampled quadrature components. The carrier phase error of the stored baseband time corrected quadrature samples are then estimated and the carrier phase is corrected according to the estimated phase error. The corrected clock and carrier signals are then forwarded to decision circuit means for providing demodulated data.

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