Patent ID: 8229010
Filing Date: 2012-07-24
Classification: H04B,H04L

Abstract:
1. An OFDM (Orthogonal Frequency Division Multiplexing) receiving apparatus comprising: a plurality of antennas; receiving systems respectively connected to each of the antennas, each of the receiving systems including: operation units to obtain, in each of the receiving systems, a time phase error between a symbol starting position and a position of a reference clock signal and to obtain an average value of the time phase errors in each of the receiving systems; a decision unit to combine the average values obtained by the operation units in the receiving systems; and a correction unit to generate a correction instruction in accordance with an output of the decision unit, wherein each of the clock recovery units includes a holding circuit to hold the demodulated digital signal generated by a corresponding orthogonal demodulator and a decimation unit to decimate a pulse of a clock signal generated by an oscillator according to the correction instruction generated by the correction unit, and wherein each of the clock recovery units recovers a clock of the demodulated digital signal by reading out the demodulated digital signal from the holding circuit using the clock signal decimated by the decimation unit.