Parallel Code and Frequency Synchronization for Wireless Receivers

The patent applies preliminary action by starting frequency synchronization early in the process using approximate sample timing information obtained during code synchronization, rather than waiting for complete code synchronization to finish. This allows frequency synchronization to begin processing preamble symbols before code synchronization completes, overlapping the two processes to reduce total synchronization time while managing hardware complexity through staged initialization.

The patent implements continuity of useful action by maintaining both code synchronization and frequency synchronization processes running simultaneously rather than sequentially. The frequency synchronization continues processing using down-sampled signals based on approximate timing while code synchronization refines the timing, ensuring continuous utilization of processing resources and reducing idle time between synchronization stages.

The patent applies segmentation by dividing the parallel processing architecture into distinct functional blocks: a code synchronization unit that processes the received signal to generate approximate sample timing information, and a frequency synchronization unit that uses down-sampled versions of the signal based on that timing information. This modular segmentation allows independent optimization of each unit while managing overall system complexity.

The patent uses an intermediary approach by introducing a peak counter as a mediator between the code synchronization process and frequency synchronization process. The peak counter monitors correlation peaks and triggers frequency synchronization initiation when a threshold is reached, providing a controlled interface that coordinates the parallel processes without requiring complex direct interaction between the synchronization units.

The patent applies dynamics by making the frequency synchronization process adaptive to the quality of timing information available. When approximate sample timing information is first available, frequency synchronization begins with coarser processing using down-sampled signals. As code synchronization progresses and provides refined timing information, the frequency synchronization process continues with full-resolution signals, dynamically adjusting processing precision to match the available timing accuracy.

The patent implements partial action by initiating frequency synchronization with down-sampled signals and approximate timing information rather than waiting for complete, high-precision timing data. This partial processing allows frequency synchronization to make progress on frequency offset estimation using available resources, while the full-precision processing continues in parallel once better timing information becomes available, achieving a balance between speed and accuracy.