Efficient Multi-Hypothesis Tests for Extended Coherent Acquisition Using Modified Linear Feedback Shift Register Secondary Codes
Increasing the coherent integration time during signal acquisition enhances sensitivity, accuracy, and detection performance. However, it is limited by the sign transition between data symbols. A method to increase the coherent integration is to use multi-hypothesis (MH) tests for all possible combinations. This paper presents a novel processing-efficient acquisition method. It uses a linear-feedback shift register (LFSR) based secondary code to test multiple overlapping hypotheses simultaneously. Results show similar performance to conventional MH approaches but with improved processing efficiency.