PATENT CLAIM ANALYSIS

Application Number: 16172727
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-02
Patent Classification: ["375", "260000"]

Abstract:
Provided are a preamble symbol generation method and receiving method, and a relevant frequency-domain symbol generation method and a relevant device, characterized in that the method comprises: generating a cyclic prefix according to a partial time-domain main body signal truncated from a time-domain main body signal; generating a modulation signal based on a portion or the entirety of the partial time-domain main body signal; and generating time-domain symbols based on at least one of the cyclic prefix, the time-domain main body signal and the modulation signal, wherein the preamble symbol contains at least one of the time-domain symbols. Therefore, using the entirety or a portion of a certain length of a time-domain main body signal as a prefix, it is possible to implement coherent detection, which solves the issues of performance degradation with non-coherent detection and differential decoding failure under complex frequency selective fading channels; and generating a modulation signal as a postfix based on the entirety or a portion of the above truncated time-domain main body signal enables the generated preamble symbol to have sound fractional frequency offset estimation performance and timing synchronization performance.

Claim (Index 16):
The preamble symbol receiving device of  claim 13 , wherein the initial timing synchronization method comprises:\n a first initial timing synchronization method: conducting necessary inverse processing and/or signal demodulation on the processed signal using a processing relationship between any two of the cyclic prefix, the time-domain main body signal and the modulation signal, and then performing delayed moving auto-correlation to acquire an accumulation correlation value; and performing delay relationship match and/or a specific mathematical calculation based on the accumulation correlation value, and then a processed value obtained is used for the initial timing synchronization to preliminarily determine the position of the preamble symbol, and/or a second initial timing synchronization method: when any of the time-domain main body signals in the preamble symbol contains a known signal, conducting differential operation on the time-domain main body signal according to N predefined differential values, and also conducting differential operation on time-domain signal corresponding to the known signal, then correlating the two to obtain N groups of differential correlation results corresponding to the N differential values on a one-to-one basis, and performing initial synchronization based on the N groups of differential correlation results to obtain processed values, for preliminarily determining the position of the preamble symbol, where N\u22651, wherein when the determination of the position of the preamble symbol is accomplished based on the first initial timing synchronization method and the second initial timing synchronization method, weighting the respectively obtained processed values, and accomplishing initial timing synchronization based on the weighted arithmetic results.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 97.0
- Lexical Diversity: 2.35714
- Patent Class: 375.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15304857', '15304856', '15304853', '11444735', '15909771']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5238189096144085
- 35 USC 102 Novelty (BERT): 0.6017956786425518
- Combined Prediction Score: 0.5316165865172228
- Mean Citation Score: 389.503392
- Max Citation Score: 540.2569599999998
- Similarity Product: 448.15954961071

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