SYSTEM FOR QUICKLY SYNTHESIZING WAVE BEAMS AND CARRIER SYNCHRONIZATION METHOD FOR VARIOUS SENDING ANTENNAS AT SOURCE END THEREOF

摘要

The present invention is applicable to the technical field of wireless communications. Provided are a system for quickly synthesizing wave beams and a carrier synchronization method for various sending antennas at a source end thereof. Sending antennas at a source end in the present invention can realize accurate time slot control, and can conduct frequency and phase estimation on a received signal and conduct estimation on phase deviation information caused by a channel time delay. The present invention takes full advantage of a broadcast characteristic of a wireless link. For each broadcast, all remaining base stations except a broadcasting base station will estimate phase values and frequency values, so that meaningless mutual interference can be avoided. In the case where a system is composed of Μ base stations, two methods are provided for realizing global synchronization. Realizing global synchronization requires M or M+1 non-overlapped time slots, and the number of time slots is greatly less than the number of time slots required by other synchronization protocols, for example, a two-way synchronization protocol requires 2M-2 non-overlapped time slots.