| 摘要 |
A method and apparatus for determining initial carrier and symbol phase estimates in a burst mode digital communication system are described. In-phase and quadrature sample of a BPSK preamble are sampled to obtain correlation values (YE, YO, XE, XO). Next, sum (7, 9, 10) and differences (8, 11, 12) of the correlation values are obtained. Then the initial carrier phase estimate (TAUHAT) and the initial symbol phase estimate (TAUHAT) are obtained through application of an algorithm. The apparatus that implements the method consists of adders (9, 10, 11, 12, 16, 17), inverters (7, 8, 15), arc tangen t look-up tables (13, 14) and divide by 2 logic units (18, 19).
|
