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 1):
A transmitter configured to operate in a training mode of operation and a normal transmission mode of operation, the transmitter comprising:\n a signal generator arranged to generate a digital baseband signal that is representative of a signal for transmission; a digital predistortion, DPD, circuit configured to predistort the digital baseband signal; a first frequency shift circuit operably coupled to the DPD circuit and configured to frequency shift the signal for transmission in a first frequency direction, where the frequency-shifted signal is then transmitted to a power amplifier; a feedback path coupleable to an output of the power amplifier and configured to route a portion of a power amplified predistorted signal to a second frequency shift circuit that is configured to frequency shift a fed back power amplified predistorted signal portion in a second frequency direction opposite to the first frequency direction; and a calibration engine, located in the feedback path and coupled to the signal generator and arranged to receive and compare the digital baseband signal representative of a signal for transmission with the fed back power amplified predistorted signal portion shifted in the second frequency direction, wherein the calibration engine is configured to determine at least one DPD compensation value during a training mode of operation and wherein the first frequency shift circuit and second frequency shift circuit apply the frequency shift in a first direction and a second frequency direction opposite to the first frequency direction only in the 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): 0.5081884730827766
- 35 USC 102 Novelty (BERT): 0.5200532074810408
- Combined Prediction Score: 0.5093749465226031
- Mean Citation Score: 286.250042
- Max Citation Score: 342.78513
- Similarity Product: 308.8194572707879

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