Apparatus and method for automatic frequency prediction control

摘要

An automatic frequency control apparatus and method are provided. If the number of frequency error measurements is smaller than a reference number for frequency estimation compensation, the automatic frequency control apparatus performs frequency compensation using a frequency error value, and if the number of frequency error measurements is equal to or greater than the reference number for frequency estimation compensation, the automatic frequency control apparatus performs frequency compensation by estimating a frequency value that is to be used until the next frequency control period. Therefore, since frequency errors are accurately corrected in a high-speed mobile environment, an excellent channel environment may be maintained, and accordingly an occurrence frequency of re-transmission may be lowered, resulting in ensuring a high data rate.

主权项

1. An automatic frequency control apparatus, comprising:
a frequency error measurement unit to measure a frequency error between a transmission frequency and a reception frequency and to store the frequency error; a comparator to compare the number of frequency error measurements performed by the frequency error measurement unit to a reference number for frequency estimation compensation; a first compensator to perform frequency compensation using the frequency error, when the number of frequency error measurements is smaller than the reference number for frequency estimation compensation; and a second compensator to perform frequency compensation by using a plurality of estimated frequency values, produced using a frequency estimation function with respect to time, to produce a plurality of changes in a compensated frequency at a corresponding plurality of times until the next frequency control period, when the number of frequency error measurements is equal to or greater than the reference number for frequency estimation compensation.