公开(公告)号：JP2002094398A

公开(公告)日：2002-03-29

申请号：JP2001251033

申请日：2001-08-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DIMEO RICHARD W ,  KOLSRUD ARILD ,  KUMAR SANJAY ,  PAGANO II CARMINE JAMES

IPC: H04B1/10

Abstract: PROBLEM TO BE SOLVED: To provide a band edge power cancellation system that reduces interference in a wireless communication system consisting of adjacent cells. SOLUTION: The band edge amplitude reduction system changes a filtering characteristic of a receiver on the basis of a signal adjacent to an edge of the operating band of the receiver and/or the amplitude of a signal which is not under the power control of the receiver. For example, the receiver measures power level over a bandwidth at the band edge of the operating band of the receiver. When the power of a signal adjacent to the operating band is too strong for the signal power within the operating band, an overload protection circuit changes the filtering characteristics of the receiver, to enhance the attenuation of the signal from the adjacent band. In certain embodiments, the overload protection circuit enables a filter, whose bandwidth is narrower, to switch the signal to attenuate the signal from the adjacent band at the edge of the operating band of the receiver, so as to prevent the interference with or the overload of the receiver by signals from the outside of the operating band and/or signals which are not under the control of the receiver.

公开(公告)号：DE60140034D1

公开(公告)日：2009-11-12

申请号：DE60140034

申请日：2001-03-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DIMEO RICHARD W ,  KOLSRUD ARILD ,  KUMAR SANJAY ,  PAGANO CARMINE JAMES II

IPC: H04B1/10

Abstract: A band edge amplitude reduction system changes the filtering characteristics of a receiver based on the amplitude of signal(s) adjacent to an edge of the operating band of the receiver and/or of signals not under the power control of the receiver. For example, the receiver measures the power level over a bandwidth at the band edges of the operating band of the receiver. If the signals adjacent to the operating band are strong enough relative to the signal power within the operating band, overload protection circuitry changes the filtering characteristics of the receiver to improve the attenuation of the signal(s) from the adjacent band(s). In certain embodiments, the overload protection circuitry switches in filter(s) with a narrower bandwidth to attenuate the signal(s) from adjacent band(s) at the edge(s) of the operating band of the receiver, thereby preventing interference with or the overload of the receiver by signals from outside the operating band and/or not under the power control of the receiver.