Freescale Semiconductor,inc.

Vt Idirect, Inc.

Paul M Wayner

Adrian R Macias

Ronggang Qi

Baoyan Ding

A method of decoding a digitally encoded signal having plural channels includes sampling a transient portion of a master filter mask, storing matched filter coefficients obtained from the sampling, receiving the digitally encoded signal, channelizing the digitally encoded signal into the plural channels, and generating a channel matched filter mask for each one of the plural channels using a subset of the stored coefficients. The method also includes filtering each one of the plural channels, in the frequency domain, based on the channel matched filter mask generated for each of the plural channels. Also disclosed are related methods using a burst reconstruction buffer, per channel distortion equalization, channel estimation and activity monitoring, and noise floor estimation, as well as corresponding apparatuses.

Multicarrier channelization and demodulation apparatus and method

A apparatus () and method () are presented for preventing glitches and data loss in an Digital Base Band (DBB) portion () of an Ultra Wideband (UWB) receiver. a first and a second recovered clock () and an external clock () can be input to a switch (). Logical rules () can be used to determine conditions under which to hold the state of an output clock () based on the states of a first clock () and a second clock () and the state of a switch request signal (). In addition to holding the state of the output clock, a first data stream () associated with the first clock and a second data stream () associated with the second clock can be synchronized such that when switching from the first to the second clock no data loss will be experienced in the data stream.

Apparatus and method for switching clocks while preventing glitches and data loss

A received wireless signal contains a plurality of path components, each having a phase indeterminate data stream derived from an original data stream. The receiver splits the received signal into N signal copies for N raking channels, which correlate each of the N signal copies with N locally generated signals, respectively, to generate N correlated signals. Each of the N correlated signals carries an estimated phase indeterminate data stream. The raking channels then synchronize each of the correlated signals to a system clock in phase and frequency to generate N synchronized signals. The N raking channels then align the N synchronized signals to generate N aligned signals, each of which carries an aligned path data stream that is normalized in time with respect to the other aligned signals. Finally the receiver combines the aligned signals to produce an estimated original data stream.

Growing community of inventors

Centreville, VA, United States of America

Paul M Wayner