Comparison of compression algorithms on vehicle communications system

In order to improve the compression ratio, most of improved compression methods require more memory and CPU time. But these improvements are not suitable for embedded system with limited-resource, especially for vehicle communications system. In order to communicate realtimely by lower costs, the huge and short data are compressed before transmitting. This paper discusses several original lossless compression methods including their principles, features, advantages and disadvantages respectively. Experiments on the front vehicle system show that the LZ77, PPM and BWT are more suitable for the automobile communication data, and they have better compression ratios, simpler coding, lower CPU and memory costs.