Research on Anti-Interference for RF Communication in Wireless Capsule Endoscope

Based on analyzing the delay, transfer rate and complexity of different error check methods, this article advances the method of changing RF channel and using low-frequency electro-magnetic induction link to enhance system anti- interference ability. The stop-and-wait protocol can be easily implemented. But the channel utilization ratio and the throughput are low. While the continuous ARQ and the select ARQ need the sliding window, timer and memory space. So it is difficult to integrate the continuous ARQ and the select ARQ into the software of the in-vivo capsule. Then it emphasizes on analyzing the working principle and implementing of the optimized anti-interference technology. This method changes RF channel and optimizes error check protocol to reduce delay and ensure the reliable communication. It also requires the in-vitro device to send command to reduce consumption and complexity of the in-vivo device by analyzing data packet.