Review Article

Revisiting of Channel Access Mechanisms in Mobile Wireless Networks through Exploiting Physical Layer Technologies

Figure 12

The rateless coding scheme in Strider. The original data stream is divided into blocks, each with complex symbols. The blocks are linearly combined to form a new packet for transmission. The sender will create multiple packets using different linear combinations and transmit them until the receiver can decode all the blocks. After receiving enough signals, the receiver first decodes the first block through treating the other blocks as noise, then reencodes it, and subtracts it from the received signal to proceed the next block. It will repeat this process until all the blocks are decoded.