US 7,443,935 B2Granted

Apparatus and method for dynamically adjusting receiver bandwidth

AssigneeTexas Instruments Incorporated

InventorJames B. Cho

Life of this patent

Estimating the term…

Loading patent…

Abstract

An apparatus for adjusting bandwidth for a receiver includes: (a) a receiver clock operating according to receiver clock parameters related to received signals for sampling received signals; (b) a local clock; (c) a tracker receiving an indicator related to the receiver clock parameter and generating a tracking parameter for comparing the receiver clock parameter and periodicity of the local clock; (d) a counter for counting events associated with the tracking parameter and generating an event count relating to the received signals; (e) a decision unit for reckoning the event count and generate a decision parameter relating to the reckoning; and (f) output logic coupled with the decision unit, the tracker and the receiver clock for evaluating the decision parameter and the tracking parameter by a logical routine for determining a need for changing operation of the receiver clock and for generating a change signal when the need exists.

Claims19

Dependent claims

An apparatus for dynamically adjusting receiver bandwidth for a receiver device receiving received signals in a communication system;

the apparatus comprising:
(a) a receiver clock unit coupled with said receiver device for driving said receiver device;
said receiver clock unit operating according to at least one receiver clock parameter for effecting sampling of said received signals;
said at least one receiver clock parameter being affected by at least one feature of said received signals;
(b) a local clock unit operating according to a local clock periodicity;
(c) a tracking unit coupled with said receiver device and with said local clock unit;
said tracking unit receiving from said receiver device at least one indicator related to said at least one receiver clock parameter;
said tracking unit generating at least one tracking parameter for quantifying a comparison between said at least one receiver clock parameter and said local clock periodicity;
(d) a counter unit coupled with said tracking unit;
said counter unit counting events associated with said at least one tracking parameter;
said counter unit generating an event count indicating at least one characteristic relating to said received signals;
(e) a decision unit coupled with said counter unit;
said decision unit reckoning said event count to appraise said at least one characteristic;
said decision unit generating at least one decision parameter relating to said reckoning;
and
(f) an output logic unit coupled at least with said decision unit, said tracking unit and said receiver clock unit;
said output logic unit evaluating said at least one decision parameter and said at least one tracking parameter according to a predetermined logical routine for determining whether a need exists for changing said operating of said receiver clock unit;
said output logic unit generating at least one change signal to effect at least a portion of said changing when said evaluating indicates said need exists.

15 more elements

An apparatus for dynamically adjusting jitter tolerance of a receiver device receiving received signals in a communication system;

the apparatus comprising:
(a) a receiver clock unit coupled with said receiver device;
said receiver clock operating according to at least one receiver clock parameter for effecting sampling of said received signals;
(b) a local clock unit operating according to a local clock periodicity;
(c) a tracking unit coupled with said receiver clock unit and with said local clock unit;
said tracking unit receiving from said receiver clock unit at least one indicator related to said sampling;
said tracking unit generating at least one tracking parameter indicating a relationship between said sampling and said local clock periodicity;
(d) a counter unit coupled with said tracking unit;
said counter unit counting events associated with said at least one tracking parameter;
said counter unit generating an event count indicating at least one characteristic relating to said received signals;
(e) a decision unit coupled with said counter unit;
said decision unit reckoning said event count;
said decision unit generating at least one decision parameter relating to said reckoning;
and
(f) an output logic unit coupled with said decision unit, said tracking unit and said receiver clock unit;
said output logic unit applying a predetermined logic routine to evaluate said at least one decision parameter and said at least one tracking parameter for determining whether a need exists for changing at least one of said at least one receiver clock parameter;
said output logic unit generating at least one change signal to effect at least a portion of said changing when said evaluating indicates said need exists.

14 more elements

A method for dynamically adjusting receiver bandwidth for a receiver device receiving received signals in a communication system;

the method comprising the steps of:
(a) driving a receiver clock unit according to at least one receiver clock parameter for effecting sampling of said received signals;
said at least one receiver clock parameter being affected by at least one feature of said received signals;
(b) using at least one indicator related to said at least one receiver clock parameter for generating at least one tracking parameter;
said at least one tracking parameter quantifying a comparison between said at least one receiver clock parameter and a local clock periodicity of a local clock unit;
(c) counting events associated with said at least one tracking parameter to generate an event count indicating at least one characteristic relating to said received signals;
(d) reckoning said event count to appraise said at least one characteristic;
(e) generating at least one decision parameter relating to said reckoning;
(f) evaluating said at least one decision parameter and said at least one tracking parameter according to a predetermined logical routine for determining whether a need exists for changing at least one of said at least one receiver clock parameter;
and
(g) providing at least one change signal to said receiver clock unit to effect at least a portion of said changing when said evaluating indicates said need exists.

8 more elements

Dependencies are inferred from the claim text.