Patent ID: 9209847
Filing Date: 2015-12-08
Classification: H04B,H04L

Abstract:
1. A method for achieving China Mobile Multimedia Broadcasting (CMMB) diversity reception, comprising: acquiring respective Analogue-to-Digital Converter (ADC) data of two antennas; respectively conducting a synchronization and Fast Fourier Transform (FFT) operation on the ADC data of the two antennas to acquire delay information about the two antennas, and selecting a signal to noise ratio (SNR) configuration parameter according to an operation result; according to the delay information, conducting delay compensation on the operated data; and according to the selected SNR configuration parameter, merging the data of the two antennas on which the delay compensation is conducted, and outputting the merged data; wherein the step of respectively conducting a synchronization and FFT operation on the ADC data of the two antennas to acquire delay information about the two antennas comprises: respectively conducting a mixing process on the ADC data of the two antennas according to a Central Processing Unit (CPU) configuration; conducting a coarse synchronization operation on the data on which the mixing process is conducted according to a signal feature of the ADC data; conducting a FFT operation on the data on which the coarse synchronization operation is conducted; conducting a fine synchronization operation on the data on which the FFT operation is conducted to acquire offset values of the two antennas with respect to a predetermined clock; and acquiring the delay information about the two antennas according to the offset values.