PATENT CLAIM ANALYSIS

Application Number: 15869901
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["340", "853100"]

Abstract:
This invention is designed for use in transmission of data between downhole module in a wellbore and a controlling module at the surface. The invention provides an apparatus for receiving data signals from a telemetry module comprising first and second adaptive equalisers, and in which in a first modulation mode the coefficients of the first adaptive equaliser are updated until an error signal falls below a predetermined threshold and in a second modulation mode the coefficients of the first adaptive equaliser are locked and coefficients of the second adaptive equaliser are updated to continually minimise an error signal in which the number of bits encoded by the symbols of the first signal in an initial modulation mode is fewer than the number of bits encoded by the symbols of the second signal in a subsequent modulation mode.

Claim (Index 1):
A method of adaptive equalisation comprising the steps of:\n receiving a first signal transmitted via a channel in which the first received signal differs from the first transmitted signal due to channel distortion and/or noise, the first signal comprising a sequence of symbols encoded by inphase and quadrature components; repeating the steps of\n filtering a portion of the received first signal using a first filter having a plurality of first filter coefficients; \n determining the likely inphase and quadrature components of the first transmitted signal; \n determining a first error signal in dependence upon the difference between the likely inphase and quadrature components and the received inphase and quadrature components; \n updating the first filter coefficients to reduce said first error signal; \n until the average first error signal is less than a predetermined threshold; and the method further comprises receiving a second signal transmitted via a channel in which the second received signal differs from the second transmitted signal due to channel distortion and/or noise, the second signal comprising a sequence of symbols encoded by inphase and quadrature components; continually repeating the steps of\n filtering a portion of the received second signal using said first filter to obtain a first filtered second signal; \n filtering the first filtered second signal using a second filter having a plurality of second filter coefficients; \n determining the likely inphase and quadrature components of the second transmitted signal; \n determining a second error signal in dependence upon the difference between the likely inphase and quadrature components and the received inphase and quadrature components; \n updating the second filter coefficients to reduce second error signal; \n and wherein the number of bits encoded by the symbols of the first signal in an initial modulation mode is fewer than the number of bits encoded by the symbols of the second signal in a subsequent modulation mode.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 86.0
- Lexical Diversity: 2.25806
- Patent Class: 340.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14769672', '09981085', '15446444', '12205448', '14769695']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6430291537387858
- 35 USC 102 Novelty (BERT): 0.5120235502918676
- Combined Prediction Score: 0.629928593394094
- Mean Citation Score: 225.326068
- Max Citation Score: 256.1573
- Similarity Product: 192.42162826299668

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

Dataset: test