Patent ID: 8442098
Filing Date: 2013-05-14
Classification: H04B,H04H,H04L

Abstract:
1. A distributed repeater for repeating a signal, comprising: a pre-processing unit configured to receive a first radio frequency (RF) signal transmitted from an external device and demodulate the first RF signal into a baseband signal; an equalizer configured to equalize the baseband signal to correct a distortion occurring on a transmission channel; an identification signal generation and insertion unit configured to generate an identification signal for identification of the distributed repeater and network conditioning, and insert the identification signal in the equalized baseband signal; and a post-processing unit configured to convert the baseband signal from the identification signal generation and insertion unit into an a second RF signal different from the first RF signal, and send the second RF signal, wherein the equalizer comprises: an equalizer input-signal storage configured to store a signal input from the pre-processing unit; a filtering unit configured to filter the signal inputted from the pre-processing unit to perform channel equalization; a symbol detector configured to detect a symbol from a signal input from the filtering unit; a statistical data calculator configured to calculate statistical data required in a blind mode; a selection unit configured to select an output signal of a decision-based mode or the blind mode; an error-signal calculator configured to compare an output signal of the filtering unit with the output signal selected by the selection unit to calculate an error signal; and a tap coefficient update unit configured to update a tap coefficient of the filtering unit on the basis of the error signal calculated by the error signal calculator.