PATENT CLAIM ANALYSIS

Application Number: 16057822
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2020-02
Patent Classification: ["null", "null"]

Abstract:
Techniques are described for crest factor reduction in power amplifier circuits. For example, crest factor reduction can keep the peak signal level of a signal for transmission to below a peak threshold level associated with a power amplifier in the transmission path. The signal is received by the crest factor reduction system and clipped in accordance with the peak threshold level. Edge smoothing is then applied to the clipped signal to reduce out-of-band emissions. The edge smoothing is implemented by a moving average filter, such as a time-domain box filter. In some embodiments, a maximum operation or minimum operation is used to prevent signal peak regrowth after the filtering. Some embodiments also include various iteration loops to further improve crest factor reduction.

Claim (Index 1):
A crest factor reduction system comprising:\n an input node to receive an input data signal; an output node to output an output data signal; a clipper subsystem to generate, responsive to receiving a clipper input signal, a clipper output signal that is a clipped portion of the clipper input signal that exceeds a threshold peak level, the clipper subsystem having at least a first clipper mode in which the clipper subsystem is coupled with the input node, such that the clipper input signal is the input data signal; a filter subsystem to generate, responsive to receiving a filter input signal, a filter output signal that is a function of an average of the filter input signal over a moving time window, the filter subsystem having at least a first filter mode in which the filter subsystem is coupled with the clipper subsystem, such that the filter input signal is the clipper output signal, the filter subsystem comprising:\n a moving average filter to generate a moving average signal that is the average of the clipped portion of the filter input signal over the moving time window; and \n a maximum operation subsystem to receive the moving average signal and the filter input signal, and to generate the filter output signal by computing a maximum of the moving average signal with respect to the clipper output signal; and \n an output signal generator to generate the output data signal at the output node by subtracting the filter output signal from the input data signal.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 96.0
- Lexical Diversity: 1.78378
- Patent Class: nan
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15391183', '12245047', '13687576', '15514855', '12567509']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.56918849945356
- 35 USC 102 Novelty (BERT): 0.4938286990120599
- Combined Prediction Score: 0.56165251940941
- Mean Citation Score: 239.276928
- Max Citation Score: 259.64227
- Similarity Product: 183.22033666165

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

Dataset: test