PATENT CLAIM ANALYSIS

Application Number: 16408979
Application Type: Utility
Filing Date: 2019-05
Publication Date: 2019-11
Patent Classification: ["455", "114300"]

Abstract:
A pre-distorter that both accurately compensates for the non-linearities of a radio frequency transmit chain, and that imposes as few computation requirements in terms of arithmetic operations, uses a diverse set of real-valued signals that are derived from the input signal. The derived real signals are passed through configurable non-linear transformations, which may be adapted during operation, and which may be efficiently implemented using lookup tables. The outputs of the non-linear transformations serve as gain terms for a set of complex signals, which are functions of the input, and which are summed to compute the pre-distorted signal. A small set of the complex signals and derived real signals may be selected for a particular system to match the classes of non-linearities exhibited by the system, thereby providing further computational savings, and reducing complexity of adapting the pre-distortion through adapting of the non-linear transformations.

Claim (Index 29):
A digital predistorter circuit comprising:\n an input port for receiving an input signal (u); an output port for providing an output signal (v); storage for values of a plurality of configuration parameters (x); wherein the circuit is configured to perform operations comprising: receiving the input signal (u) via the input port; processing the input signal (u) to produce a plurality of transformed signals (w); determining a plurality of phase-invariant derived signals (r), each derived signal (r j ) of the plurality of derived signals being equal to a non-linear function of one or more of the transformed signals, at least some of the derived signals being equal to functions of different one or more of the transformed signals; transforming each derived signal (r j ) of the plurality of phase-invariant derived signals according to a parametric non-linear transformation to produce a time-varying gain component (g i ) of a plurality of gain components (g); forming a distortion term by accumulating a plurality of terms, each term being a product of a transformed signal of the plurality of transformed signals and a time-varying gain, the time-varying gain being a function (\u03a6) of a one or more of the phase-invariant derived signals, the function of the one or more of the phase-invariant derived signals being decomposable into a combination of one or more parametric functions (\u03d5) of a corresponding single one of the time-varying gain components (g i ); and providing the output signal (v) determined from the distortion term via the output port.

Metadata:
- Claim Count in Document: 71.0
- Percentile: 100.0
- Lexical Diversity: 1.91358
- Patent Class: 455.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15992614', '14953762', '15426760', '11070612', '15952864']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.636798656946276
- 35 USC 102 Novelty (BERT): 0.4854333163004572
- Combined Prediction Score: 0.6216621228816942
- Mean Citation Score: 179.87580399999996
- Max Citation Score: 192.56447
- Similarity Product: 143.77784458064082

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 0

Dataset: test