Puncturing and interleaving analysis of a physical layer link based on IEEE802.11a

We built a Simulink PHY Layer platform of OFDM-based IEEE802.11a standard. An improved puncturing method was proposed according to the principle of Viterbi decoding, and we did some simulations and analysis of the link layer properties under different E_b/N₀ based on the same parameters of the PHY Layer in IEEE802.11a. We could reach the conclusion of the improved puncturing method increases about 3dB in the bit error probability of the OFDM system comparing with the puncturing method in the IEEE802.11a. Moreover, the simulations of our new matrix interleaving constructor based on relevant theory we proposed reveals that when the E_b/N₀ is greater than 5dB, the bit error probability will improve 1 to 2dB.