Patent ID: 8339980
Filing Date: 2012-12-25
Classification: H04H,H04L

Abstract:
1. A receiving system, comprising: at least two antennae each receiving broadcast signals including mobile service data and known data sequences; at least two demodulators each corresponding to one of the at least two antennae, wherein each of the at least two demodulators demodulates a broadcast signal received by the corresponding antenna; at least two compensating units each corresponding to one of the at least two demodulators, wherein each of the at least two compensating units estimates a channel impulse response (CIR) of the demodulated broadcast signal of the corresponding demodulator based on at least one of the known data sequences and compensates channel distortion of the demodulated broadcast signal of the corresponding demodulator based on an equalization coefficient calculated based on at least two CIRs each estimated by one of the at least two compensating units; an adder summing each squared value of the at least two CIRs and adding the reciprocal of a signal-to-noise ratio (SNR) to the resulting sum; a fraction calculator generating a fractional number having the output of the adder as a denominator and providing the generated fractional number to the at least two compensating units; a combining unit combining at least two distortion-compensated broadcast signals each output from one of the at least two compensating units in order to output a combined broadcast signal; and a decoder block-decoding mobile service data contained in the combined broadcast signal, wherein each of the at least two compensating units comprises: a CIR estimator estimating the CIR of the demodulated broadcast signal of the corresponding demodulator and converting the estimated CIR to a frequency domain CIR; and a first multiplier performing complex-multiplication on the generated fractional number with a conjugate value of the frequency domain CIR in order to output the equalization coefficient.