PATENT CLAIM ANALYSIS

Application Number: 16037747
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["375", "232000"]

Abstract:
Receivers for coded orthogonal frequency-division multiplexed (COFDM) signals conveying the same coded data both in lower-frequency and upper-frequency sidebands thereof. Apparatus for performing a complex synchrodyne of COFDM signal to baseband is followed by apparatus for extracting the COFDM subcarriers of the lower-frequency and upper-frequency sidebands of the COFDM signal from the in-phase and quadrature-phase results of the complex synchrodyne. The COFDM subcarriers of the lower-frequency sideband as converted to baseband are supplied to apparatus for demodulating and demapping those subcarriers to recover a first set of coded data. The COFDM subcarriers of the upper-frequency sideband as converted to baseband are supplied to apparatus for demodulating and demapping those subcarriers to recover a second set of coded data. A diversity combiner combines the first and second sets of coded data for subsequent decoding.

Claim (Index 20):
Receiver apparatus for coded orthogonal frequency-division modulation (COFDM) radio-frequency signals the lower and upper halves of the frequency spectrum of each of which convey the same forward-error-correction (FEC) coded data, said receiver apparatus comprising:\n a front-end tuner for selectively receiving a radio-frequency COFDM signal as transmitted in analog form and down-converting said radio-frequency COFDM signal to an intermediate-frequency COFDM signal; apparatus for performing an in-phase synchrodyne and a quadrature synchrodyne of said intermediate-frequency COFDM signal to recover first and second baseband signals respectively; a first computer connected for computing the discrete Fourier transform of successive samples of said first baseband signal in digital form; a second computer connected for computing the discrete Fourier transform of successive samples of said second baseband signal in digital form; a parallel array of digital adders for generating said first set of QAM symbols responsive to respective sums of (a) the complex coordinates of respective components of the discrete Fourier transform of successive samples of said first baseband signal supplied through respective Hilbert transform connections to respective first addend connections of said digital adders and (b) the complex coordinates of respective components of the discrete Fourier transform of successive samples of said second baseband signal supplied through respective connections to respective second addend connections of said digital adders; a parallel array of digital subtractors for generating said second set of QAM symbols responsive to respective differences between (a) the complex coordinates of respective components of the discrete Fourier transform of successive samples of said first baseband signal supplied through respective Hilbert transform connections to respective subtrahend connections of said digital adders and (b) the complex coordinates of respective components of the discrete Fourier transform of successive samples of said second baseband signal supplied through respective connections to respective minuend connections of said digital subtractors; a first parallel-to-serial converter connected for receiving in parallel each said first set of QAM symbols and for supplying each said first set of QAM symbols seriatim, said first parallel-to-serial converter constituting said means for serially arranging said first set of QAM symbols in each COFDM symbol in said first prescribed spectral order; a first frequency-domain channel equalizer for equalizing said first sets of QAM symbols supplied seriatim from said first parallel-to-serial converter to generate equalized first sets of QAM symbols supplied to said means for demapping said first set of QAM symbols; a second parallel-to-serial converter connected for receiving in parallel each said second set of QAM symbols and for supplying each said second set of QAM symbols seriatim, said second parallel-to-serial converter constituting said means for serially arranging said second set of QAM symbols in each COFDM symbol in said second prescribed spectral order; and a second frequency-domain channel equalizer for equalizing said second set of QAM symbols supplied seriatim from said second parallel-to-serial converter to generate equalized second sets of QAM symbols supplied to said means for demapping said second set of QAM symbols.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 95.0
- Lexical Diversity: 2.29508
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15213569', '15641014', '14641428', '14867930', '14183264']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5628440494537282
- 35 USC 102 Novelty (BERT): 0.5845652845881982
- Combined Prediction Score: 0.5650161729671752
- Mean Citation Score: 490.66442000000006
- Max Citation Score: 517.8119
- Similarity Product: 405.80498299593927

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