1results about How to "Reduce storage load" patented technology

The application provides a direct current offset correction circuit based on a lookup table, a zero intermediate frequency receiver and a direct current offset correction method based on a lookup table. The direct current offset correction circuit based on a lookup table comprises a storage module, an analog coarse correction module and a digital fine correction module. In the receiving channel of the zero intermediate frequency receiver, the analog coarse correction module is used to perform analog coarse correction on the direct current offset in the analog signal, and the digital fine correction module is used to perform digital fine correction on the direct current offset in the digital signal. The analog intermediate frequency correction and the digital baseband correction are considered, and the correction precision of the direct current offset is improved. Meanwhile, the direct current offset correction lookup tables generated by radio frequency and intermediate frequency devices are separately established. During correction, indexing and operation are performed based on the analog coarse correction module and the digital fine correction module. Only a small number of calculation input correction parameters need to be saved, the total capacity of the lookup table is reduced, and the storage load of the storage module is reduced.