PATENT CLAIM ANALYSIS

Application Number: 15756109
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-10
Patent Classification: ["370", "208000"]

Abstract:
A modified orthogonal frequency-division multiplexing (OFDM) communication system based on virtual decomposition of the channel is proposed. The system is fully compatible with standard OFDM transmitters and maintains several blocks of standard OFDM receivers. The proposed approach achieves also incoherent reception of multicarrier signals even with a simple autocovariance DPSK detector. This novel system substantially surpasses the performance of current approaches while requiring low computational complexity. Two preferred embodiments are described; one with coherent reception using pilot signals, and the second with incoherent receiver of differentially encoded signals.

Claim (Index 12):
A multicarrier communication system for doubly selective channels with differential encoding and a low complexity incoherent receiver based on the concept of virtual trajectories comprising:\n a) A transmitter that comprises a bit stream input connected to an m-PSK modulator with a differential encoder connected on its output; the output of the differential encoder is attached to a serial to parallel (S/P) converter; a subcarrier mapper is coupled to the output S/P block; an IFFT block that performs frequency to time conversion is connected to the mapper output; a block that performs insertion of cyclic prefix (CP) is attached to the output of the IFFT module; a parallel to serial (P/S) converter is coupled to the output of the CP module; an analog module that performs digital to analog conversion, RF modulation and amplification is connected to the P/S output, and b) A receiver that comprises an analog module that takes the signals from the propagation media and provides digital signals to the S/P converter attached to its output; the S/P convertor has a virtual trajectory estimator attached on its output; the output of the VT estimator is connected to M D  DPSK estimation modules; a combiner module is coupled to the DPSK estimators; the combiner has a detector attached to its output which provides the received bit stream.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 88.0
- Lexical Diversity: 1.3662
- Patent Class: 370.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14635309', '12274037', '13114395', '10850825', '09959015']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.466074024480285
- 35 USC 102 Novelty (BERT): 0.4913233429991764
- Combined Prediction Score: 0.4685989563321742
- Mean Citation Score: 187.544338
- Max Citation Score: 213.84045
- Similarity Product: 157.90257587622102

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