Turbo receiving method in low-orbit satellite OTFS system
By employing the BEM-LS channel estimation method in LEO satellite communication, the problem of decreased channel estimation accuracy caused by fractional Doppler spread is solved by using BEM to perform parameterized channel modeling and combining it with the LS algorithm. This achieves efficient and reliable channel estimation and improved communication performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING UNIV OF POSTS & TELECOMM
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
In existing LEO satellite communications, channel estimation methods based on the point sparsity assumption suffer from decreased channel estimation accuracy when faced with high-speed relative motion between the satellite and the ground and fractional Doppler spread caused by ground multipath scattering, making it difficult to meet the requirements of high-speed dynamic communication.
The channel is parameterized using the Basis Extended Model (BEM) and the channel coefficients are estimated by combining the Least Squares (LS) algorithm. The BEM order and pilot power ratio are jointly optimized to construct a closed-loop iterative structure for BEM-LS channel estimation, detector, and decoder.
This improved channel estimation accuracy and communication reliability, reduced computational overhead, and enabled a highly efficient and reliable LEO satellite OTFS system receiving scheme.
Smart Images
Figure CN122419554A_ABST