PATENT CLAIM ANALYSIS

Application Number: 16022937
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-02
Patent Classification: ["375", "297000"]

Abstract:
A communication unit having a transmitter and method of harmonic distortion content reduction is described. The transmitter is configured to operate in a training mode of operation and a normal transmission mode of operation. The transmitter includes a signal generator; a digital predistortion, DPD, circuit; and a first frequency shift circuit to frequency shift a signal for transmission in a first frequency direction. A feedback path and a second frequency shift circuit frequency shifts a fed back power amplified predistorted signal portion in a second frequency direction opposite to the first frequency direction. A calibration engine, receives and compares a digital baseband signal representative of a signal for transmission with the fed back power amplified predistorted signal portion shifted in the second frequency direction to determine at least one DPD compensation value only during a training mode of operation.

Claim (Index 20):
A method for limiting harmonic distortion of a transmitter signal that uses a digital predisortion circuit, the method comprising:\n generating a digital baseband signal representative of a signal for transmission; predistorting the digital baseband signal by a digital predistortion, DPD, circuit; applying a first frequency shift to frequency shift the signal for transmission in a first frequency direction, and the frequency-shifted signal is then power-amplified; feeding back a portion of the power amplified predistorted frequency shifted signal; applying a second frequency shift to a fed back power amplified predistorted frequency shifted signal portion in a second frequency direction opposite to the first frequency direction; receiving and comparing the digital baseband signal representative of a signal for transmission with the fed back power amplified predistorted signal shifted in the second frequency direction; and determining at least one DPD compensation value to be applied in a DPD circuit, such that the determined at least one DPD compensation value compensates for harmonic distortion of the transmitter signal identified using the first frequency shift and the second frequency shift and wherein applying of a first frequency shift and a second frequency shift is performed solely during a training mode of operation.

Metadata:
- Claim Count in Document: 12.0
- Percentile: 94.0
- Lexical Diversity: 2.19118
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15662848', '15662903', '14989934', '14595619', '13902023']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.508238242636098
- 35 USC 102 Novelty (BERT): 0.5205064035653709
- Combined Prediction Score: 0.5094650587290253
- Mean Citation Score: 286.250042
- Max Citation Score: 342.78513
- Similarity Product: 301.94300271761296

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

Dataset: test