PATENT CLAIM ANALYSIS

Application Number: 15910648
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-11
Patent Classification: ["375", "297000"]

Abstract:
A remote radio head unit (RRU) system is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier inside the RRU. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by a wideband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, embodiments of the present invention can compensate for the nonlinearities as well as memory effects of the power amplifier systems and also improve performance, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers, multi-frequency bands and multi-channels. Consequentially, the remote radio head system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems.

Claim (Index 10):
A dual-channel remote radio head unit comprising:\n a first transmit path including a first power amplifier configured to receive a first input signal at a first frequency band and output a first amplified output signal; a second transmit path including a second power amplifier configured to receive a second input signal at a second frequency band separated from the first frequency band and output a second amplified output signal; a duplexer configured to combine the first and second amplified output signals and provide the combined first and second amplified output signals to an antenna; a first feedback path including a first feedback signal associated with first distortions of the first amplified output signal; a second feedback path including a second feedback signal associated with second distortions of the second amplified output signal; digital logic configured to predistort the first input signal in response to the first feedback signal and predistort the second input signal in response to the second feedback signal.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 90.0
- Lexical Diversity: 1.74737
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14335647', '14703579', '14020425', '12928943', '14337004']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5105669104300249
- 35 USC 102 Novelty (BERT): 0.5422024301090956
- Combined Prediction Score: 0.513730462397932
- Mean Citation Score: 343.679184
- Max Citation Score: 372.68176
- Similarity Product: 287.8753043681908

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