Wei S Ma

US Patent:

20130170531, Jul 4, 2013

Filed:

Jan 3, 2012

Appl. No.:

13/342258

Inventors:

Victor Adut - Arlington Heights IL, US
Gregory M. Agami - Arlington Heights IL, US
Yun H. Kim - Bartlett IL, US
Wei Chuan Ma - Wauconda IL, US

Assignee:

MOTOROLA MOBILITY, INC. - Libertyville IL

International Classification:

H04B 17/00

US Classification:

375226

Abstract:

A system includes a polyphase multirate filter and a controller which, responsive to detecting a data stream: measures a current phase relationship between a current resampling filter input clock signal and a current multirate output clock signal; identifies, based on a mapping of the measured phase relationship within a pre-generated quantized mapping table, an initial polyphase filter coefficient index corresponding to the measured phase relationship; selects, based on the initial polyphase filter coefficient index identified, a corresponding polyphase filter component from within the multirate filter; configures the multirate filter to pass data from the data stream through the corresponding polyphase filter component to generate an initial output data sample; updates the initial polyphase filter coefficient index to a calculated next polyphase filter coefficient index value, in response to a request for generation of a next output data sample; and self-corrects the multirate filter responsive to a pre-identified error condition.