METHODS AND APPARATUS FOR SIGNAL FILTERING

Systems and techniques for signal filtering are described. A band pass filter is defined so as to provide a reduced rolloff region in order to avoid interference with an adjacent carrier. A definition of the band pass filter provides a frequency response that compensates for a loss of signal components in the rolloff region. The definition of the band pass filter may be based at least in part on characteristics of a specified legacy filter used by devices from which signals may be received or to which signals may be transmitted. [Reference numerals] (802) Define a filter function using target rolloff; (804) Divide frequency response of the defined filter function by frequency response of a known filter to produce target frequency response; (806) Configure filtering to achieve the target frequency response