AN IMPROVED THRESHOLD EXTENSION BLOCK PHASE ESTIMATOR FOR QUASI-COHERENT COMMUNICATIONS SYSTEMS

摘要

The invention relates to a threshold extension block phase estimator (TEBPE) which gives improved performance over existing BPE algorithms in the presenc e of noise. Specifically, the threshold and sector slip performance is superio r to that of previously disclosed algorithms. This can be of crucial advantage in coded systems. Another attribute of the TEBPE is that it can be configure d as a hybrid feedback loop incorporating characteristics of both the BPE and the PLL. This gives a high degree of flexibility with very fast acquisition times at high signal-to-noise ratio (SNR), and improved threshold performanc e at low SNR.