SYMBOL POSITION DETECTION DEVICE AND SYMBOL POSITION DETECTION METHOD

摘要

To a data reception device, a signal having a frequency of 12.5 MHz and including data is transmitted. The data reception device generates a clock B having a frequency of 400 MHz of ( 1 ) in FIG. 8, and performs sampling for the above-described 12.5 MHz signal based on the clock B (( 2 ) in FIG. 8 ). Then, the data reception device detects zero cross points of the sampled data, and generates a 25 MHz frequency clock signal indicating the zero cross points (( 3 ) in FIG. 8 ). Next, the data reception device generates, by delaying the generated clock signal by the time amount corresponding to eight clocks (( 4 ) in FIG. 8 ), a 25 MHz signal indicating symbol points. Thus, symbol points can be detected.