US 8,618,968 B2Granted

Dual digital to analog converters (DACs) with codeword parsing

AssigneeBroadcom Corporation

InventorsBruce J. Currivan, Thomas J. Kolze, Ramon A. Gomez

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Abstract

Dual digital to analog converters (DACs) with codeword parsing. With respect to a codeword that is provided to a DAC, a processing module (e.g., a rollover processor) operates to divide, partition, etc. the codeword into different respective sub-codewords as may be provided to two or more DAC's. Adaptation with respect to differently generated sub-codewords with respect to different respective codewords may be made in terms of any one or more of a variety of characteristics, including sub-codeword width (e.g., the number of bits included within a sub-codeword), quantization steps, etc. Moreover, such adaptation may be in consideration of any one or more local and/or remote operating characteristics of one or more devices, communication links, etc. within a communication system or network. Different respective sub-codewords undergo processing by different respective DAC's in generating respective analog signals for combination in generating a final or output analog signal.

Claims23

Dependent claims

An apparatus comprising:

a codeword parser configured to partition adaptively a codeword into a first plurality of sub-codewords and a second codeword into a second plurality of sub-codewords based on at least one of at least one local operating characteristic, or change thereof, of the apparatus and at least one remote operating characteristic, or change thereof, of at least one additional apparatus in communication with the apparatus via at least one communication network;
a first digital to analog converter (DAC) configured to process a first of the first plurality of sub-codewords to generate a first analog signal;
a second DAC configured to process a second of the first plurality of sub-codewords to generate a second analog signal;
and
a combiner configured to combine the first analog signal and the second analog signal to generate a first output analog signal;
and
wherein the first DAC is further configured to process a first of the second plurality of sub-codewords to generate a third analog signal;
the second DAC is further configured to process a second of the second plurality of sub-codewords to generate a fourth analog signal;
the combiner is further configured to combine the third analog signal and the fourth analog signal to generate a second output analog signal;
and
the codeword parser is further configured to partition adaptively the codeword into the first plurality of sub-codewords to ensure that the first of the first plurality of sub-codewords having a magnitude less than a maximum input magnitude of the first DAC by a first amount and the second of the first plurality of sub-codewords having a magnitude less than a maximum input magnitude of the second DAC by a second amount.

8 more elements

A communication device comprising:

a codeword parser configured to partition adaptively a codeword into a plurality of sub-codewords based on at least one of at least one local operating characteristic based on provisioned or currently available processing resources or memory within the communication device, or change thereof, of the communication device and at least one remote operating characteristic, or change thereof, of at least one additional communication device in communication with the communication device via at least one communication network;
a first digital to analog converter (DAC) configured to process a first of the plurality of sub-codewords to generate a first analog signal;
a second DAC configured to process a second of the plurality of sub-codewords to generate a second analog signal;
and
a combiner configured to combine the first analog signal and the second analog signal to generate a third analog signal.

2 more elements

A method for execution by a communication device that includes a plurality of digital to analog converters (DACs), the method comprising:

adaptively partitioning a codeword into a plurality of sub-codewords based on at least one of at least one local operating characteristic based on provisioned or currently available processing resources or memory within the communication device, or change thereof, of the communication device and at least one remote operating characteristic, or change thereof, of at least one additional communication device in communication with the communication device via at least one communication network;
operating a first digital to analog converter (DAC) for processing a first of the plurality of sub-codewords to generate a first analog signal;
operating a second DAC for processing a second of the plurality of sub-codewords thereby generating a second analog signal;
and
combining the first analog signal and the second analog signal to generate a third analog signal.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/349,107Filed 12 Jan 2012 · us provisional application
Priority: 14 Jan 2011
Published: US 2012/0183027 A119 Jul 2012
Granted: 31 Dec 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04B 1/10
Receivers: means associated with receiver for limiting or suppressing noise or interference
H03M 1/0614
Continuously compensating for, or preventing, undesired influence of physical parameters: of harmonic distortion
H03M 1/68
Digital/analogue converters: with conversions of different sensitivity, i.e. one conversion relating to the more significant digital bits and…
H04B
Transmission