Patent ID: 7801532
Filing Date: 2010-09-21
Classification: H04L

Abstract:
1. A method for transmitting a signal by a transmitter in a frequency overlay communication system, the method comprising: generating y first signal groups by shuffling input information data with a length yN on an N-by-N grouping basis according to a first shuffling scheme; generating y second signal groups by performing N-point Inverse Fast Fourier Transform (IFFT) on each of the y first signal groups; generating y third signal groups by multiplying each of the y second signal groups by preset values; generating N fourth signal groups by de-shuffling the y third signal groups on a y-by-y grouping basis according to a de-shuffling scheme; generating N fifth signal groups by performing y-point Inverse Discrete Fourier Transform (IDFT) on each of the N fourth signal groups; generating y sixth signal groups by shuffling the N fifth signal groups according to a second shuffling scheme, and serial-converting the y sixth signal groups; and performing a transmission radio frequency (RF) process on the serial-converted signal and transmitting the RF-processed signal to a receiver, wherein y is a positive integer based on a bandwidth of a first frequency band used by the frequency overlay communication system divided by a bandwidth of a second frequency band used by a non-frequency overlay communication system, and wherein N is a positive integer representing a number of IFFT points used in the non-frequency overlay communication system.