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 1):
A low complexity multicarrier communication system for doubly selective channels based on the concept of virtual trajectories comprising:\n a) A transmitter comprising a bit stream input connected to a base band modulator; the base band modulator has a serial to parallel (S/P) converter connected on its output; such (S/P) converter has a DFT spreading precoder connected on its output; the DFT spreading has a subcarrier mapping module coupled to its output; an IFFT block is coupled to the output of the subcarrier mapping module; a block that performs insertion of cyclic prefix (CP) connected to the output of the IFFT module; a parallel to serial (P/S) converter coupled to the output of the CP module; an analog module coupled to the P/S that performs digital to analog conversion, RF modulation and amplification, and b) A receiver comprising an analog module that takes the signal from the propagation media and provides digital signals to an S/P converter; the S/P converter has a virtual trajectory estimator coupled to its output. M D  channel estimation blocks are coupled to the output of the virtual trajectory estimator; the outputs of each channel estimator connected to the input of a combiner module; a DFT spreading decoder is coupled to the output of the combiner module; a detector coupled to the diversity decoder which provides the estimation of the received a 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): 0.4649308853858654
- 35 USC 102 Novelty (BERT): 0.4960193484020606
- Combined Prediction Score: 0.4680397316874849
- Mean Citation Score: 187.544338
- Max Citation Score: 213.84045
- Similarity Product: 149.72405190972984

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

Dataset: test