关键词: 帧定时同步, 单比特压缩感知, 模拟数字转换器, 定时度量

Abstract: The Compressed Sensing（CS）-based Frame Timing Synchronization（FTS） can reduce the energy consumption of communication systems and the design difficulty of the Analog-to-Digital Converter（ADC）, compared with the non-CS FTS method. Instead of preserving the measurement amplitudes of CS-based technology, the single-bit CS technology only preserves measurements’ symbol information, and thus can further reduce the system’s energy consumption and the ADC’s design difficulty. In view of the above-mentioned advantages, the single-bit CS technology is introduced into FTS in this paper, and a single-bit CS based FTS method is proposed. Firstly, the proposed method performs single-bit compressive sampling on the received signal in the frame timing transformation domain. Subsequently, the timing metrics of frame timing synchronization are reconstructed by using the sampled bit stream. Finally, the index position of the FTS is found by searching the reconstructed timing metrics according to the correlation criterion. Compared with the CS-based FTS method, the analysis and simulation results show that the proposed method can improve the Correct Synchronization Probability（CSP） with the same bit overhead. Correspondingly, less bit overhead is needed in the proposed method with the same CSP. Meanwhile, the proposed method only requires a comparator in quantization phase, which reduces the design difficulty of ADC.

Key words: frame timing synchronization, single-bit compressed sensing, analog-to-digital converter, timing metrics（metrics）