Method and apparatus in a wireless communication device for mitigating a received power overload
AssigneeMotorola, Inc.
InventorsJames David Hughes, Lynn R. Freytag, John Richard Oakley
Life of this patent
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Abstract
A power measurement element (106) measures (302) the wide-band received signal power of a receiver (102), and a wide-band AGC system (108) transfers (306) receiver gain control from an on-channel AGC system (110) to the wide-band AGC system, when the wide-band received signal power exceeds a pre-programmed threshold for longer than a pre-programmed delay time. The wide-band AGC system is arranged and programmed to decrease (308) a front-end gain of the receiver through a plurality of gain steps of a pre-programmed size (208) applied at a pre-programmed rate until the received wide-band signal power falls below the pre-programmed threshold.
Claims18
A method in a wireless communication device having a receiver, the method for mitigating a received power overload by transferring control of a receiver gain from an on-channel AGC system to a wide-band AGC system, in response to a large increase in a wide-band received signal power, the method comprising the steps of:
- measuring the wide-band received signal power;
- transferring receiver gain control from the on-channel AGC system to the wide-band AGC system, when the wide-band received signal power exceeds a pre-programmed threshold for longer than a pre-programmed delay time;
- and
- decreasing, by the wide-band AGC system after the transferring step, a front-end gain of the receiver through a plurality of gain steps of a pre-programmed size applied at a pre-programmed rate until the received wide-band signal power falls below the pre-programmed threshold.
An apparatus for use in a wireless communication device having a receiver, the apparatus for mitigating a received power overload by transferring control of a receiver gain from an on-channel AGC system to a wide-band AGC system, in response to a large increase in a wide-band received signal power, the apparatus comprising:
- a power measurement element for measuring the wide-band received signal power;
- the wide-band AGC system, coupled to the power measurement element, for transferring receiver gain control from the on-channel AGC system to the wide-band AGC system, when the wide-band received signal power exceeds a pre-programmed threshold for longer than a pre-programmed delay time;
- and
- the on-channel AGC system, coupled to the wide-band AGC system for cooperating therewith to control the receiver gain,
- wherein the wide-band AGC system is arranged and programmed to decrease a front-end gain of the receiver through a plurality of gain steps of a pre-programmed size applied at a pre-programmed rate until the received wide-band signal power falls below the pre-programmed threshold.
A wireless communication device, comprising:
- a receiver for receiving a wireless communication signal;
- and
- an apparatus coupled to the receiver for mitigating a received power overload by transferring control of a receiver gain from an on-channel AGC system to a wide-band AGC system, in response to a large increase in a wide-band received signal power, the apparatus comprising:
- a power measurement element for measuring the wide-band received signal power;
- the wide-band AGC system, coupled to the power measurement element, for transferring receiver gain control from the on-channel AGC system to the wide-band AGC system, when the wide-band received signal power exceeds a pre-programmed threshold for longer than a pre-programmed delay time;
- and
- the on-channel AGC system, coupled to the wide-band AGC system for cooperating therewith to control the receiver gain,
- wherein the wide-band AGC system is arranged and programmed to decrease a front-end gain of the receiver through a plurality of gain steps of a pre-programmed size applied at a pre-programmed rate until the received wide-band signal power falls below the pre-programmed threshold.
Dependencies are inferred from the claim text.