Abstract: In a communications system including a transmitter for transmitting signals over a transmission channel and a receiver for receiving the signals, the transmitter includes: a filter for filtering a modulated signal to modify amplitude and phase characteristics of the modulated signal; and a first processor for performing interleaving process and/or scrambling process for the filtered signal. On the other hand, the receiver includes: a second processor for performing deinterleaving process and/or descrambling process for a received signal; and an inverse filter for filtering a signal supplied from the second processor.

Abstract: A method of blindly separating a signal, wherein, for at least one source, a filter uniquely defined for a source is determined for each source, the method comprising the steps of: applying an inverse filter corresponding to inverse of the filter to one or more of multiple outputs of the received signal so as to restore property of the corresponding source; and adjusting gain of each of outputs which have been filtered by the inverse filter, under constraint that a sum of weighted multiplexed filtering output signals has the same property as an original signal of the corresponding source, in order to remove other sources or interfering signals which occupy the same frequency band or transmission time interval.

Abstract: In a communications system including a transmitter for transmitting signals over a transmission channel and a receiver for receiving the signals, the transmitter includes: a filter for filtering a modulated signal to modify amplitude and phase characteristics of the modulated signal; and a first processor for performing interleaving process and/or scrambling process for the filtered signal. On the other hand, the receiver includes: a second processor for performing deinterleaving process and/or descrambling process for a received signal; and an inverse filter for filtering a signal supplied from the second processor.