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 11):
The preamble symbol receiving device of  claim 3 , wherein let P1_A(t) be a time-domain expression of the time-domain symbol, and N A  denotes a length of the time-domain signal, Len C  denotes a length of the cyclic prefix, Len B  denotes a length of the modulation signal, f SH  denotes a modulation frequency offset value for modulating the time-domain main body signal, and T denotes a sampling period, then the time-domain expression of the time-domain symbol of the preamble symbol containing the cyclic prefix, the time-domain main body signal and the modulation signal is: P C - A - B \ue8a0 ( t ) = { P1_A \ue89e ( t + ( N A - Len C ) \ue89e T ) 0 \u2264 t < Len C \ue89e T P1_A \ue89e ( t - Len C \ue89e T ) Len C \ue89e T \u2264 t < ( N A + Len C ) \ue89e T P1_A \ue89e ( t - ( Len C + N A - N \ue89e \ue89e 1 ) \ue89e T ) \ue89e e j \ue89e \ue89e 2 \ue89e \ue89e \u03c0 \ue89e \ue89e f SH \ue89e t ( N A + Len C ) \ue89e T \u2264 t < ( N A + Len C + Len B ) \ue89e T 0 otherwise

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): 0.524672371715692
- 35 USC 102 Novelty (BERT): 0.599742163817355
- Combined Prediction Score: 0.5321793509258583
- Mean Citation Score: 389.503392
- Max Citation Score: 540.2569599999998
- Similarity Product: 439.3177981378744

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

Dataset: test