A method for detecting nonorthogonal ellipsoidal wave signals based on inter-signal cross terms
By extending signal detection to the time-frequency two-dimensional energy domain and utilizing the local features of signal cross terms for detection, the interference problem in the detection of non-orthogonal ellipsoidal wave signals is solved, and the bit error rate performance of the system is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NAVAL AVIATION UNIV
- Filing Date
- 2025-01-15
- Publication Date
- 2026-05-26
AI Technical Summary
In the existing technology, the detection performance of non-orthogonal ellipsoidal wave signals is low, especially when PSWFs signals are no longer strictly orthogonal, resulting in severe interference between signals and affecting the system's bit error rate performance.
Signal detection is extended from a single energy domain in the time/frequency domain to a two-dimensional energy domain in the time and frequency domain. The local features of the cross terms between signals are used as detection statistics. Decision detection is performed by calculating the energy density value of the cross terms at the center frequency in the frequency domain, thereby reducing interference between non-orthogonal signals.
It effectively reduces interference between non-orthogonal PSWFs signals and improves the system's bit error rate performance. Especially under AWGN channel conditions, the system's bit error rate performance is improved by about 0.5dB compared to coherent detection methods.
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Figure CN120017182B_ABST