METHOD AND TERMINAL OF DOPPLER FREQUENCY OFFSET ESTIMATION AND COMPENSATION IN TD-SCDMA SYSTEM

摘要

A method and terminal of Doppler frequency offset estimation and compensation in time division synchronous code division multiple access (TD-SCDMA) system are provided. The method includes the following steps: pre-judging which range interval an absolute value of the Doppler frequency offset in the current time slot is within; by comparing a phase difference in the corresponding path of the current time slot with a comparative time slot corresponding to the range interval, estimating phase offset amount of each chip length of the received signals caused by the Doppler frequency offset; according to the phase offset amount and by combining the existing joint detection technique, eliminating the phase offset of the received signals caused by the Doppler frequency offset by modifying an A matrix in the joint detection.