METHOD FOR GENERATING DUMMY FREQUENCIES FOR FREQUENCY HARD HANDOVER IN CODE DIVISION MULTIPLE ACCESS MOBILE COMMUNICATION SYSTEM

摘要

A method for generating dummy frequencies to make frequency hard handover smooth in provision of a digital CDMA mobile communication service when base stations are different in frequency configuration. The coverage of each of the dummy frequencies becomes the same as that of a service frequency using basic signals of the service frequency. According to the present invention, a pilot channel signal, a sync channel signal, a paging channel signal and traffic channel signals of the service frequency are placed directly on each of the dummny frequencies. Therefore, the coverage of the dummy frequency can always become the same as that of the service frequency which is varied according to a traffic amount of the base station, so that a mobile station can perfectly perform the frequency hard handover. Further, one power combiner (6), one power amplifier (21) and one power divider (22) are provided to process all of the dummy frequencies. Therefore, a dummy frequency generation circuit can become simple in construction and be reduced in cost. Also, the system reliability is enhanced.