公开(公告)号：JP2002118464A

公开(公告)日：2002-04-19

申请号：JP2001213226

申请日：2001-07-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KOLSRUD ARILD ,  PAGANO II CARMINE JAMES

IPC: H03M1/18

Abstract: PROBLEM TO BE SOLVED: To provide a method for improving an overload state in analog/digital conversion. SOLUTION: This analog/digital(A/D) converter system 12 converts an attenuated analog input signal into a digital value, and shifts the position of a digital value in a digital output depending on an analog input signal. For example, a second A/D converter 16 receives and converts an attenuated analog input signal in response to an analog input signal for saturating a first A/D converter 14, and the output of the second A/D converter 16 is used for generating the further upper bits of the digital output value so that the higher amplitude range (power or voltage level range) of the analog input signal can be converted.

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.