Turbo Codes for 10-66GHz WiMax Systems

In this paper, performances of turbo codes for 10-66GHz WiMax system are analyzed and simulated. The channel of WiMax system is modeled as Rician channel due to the short wavelength. The uniform interleaver is used in the performance analysis to derive the average upper bound of performance of turbo codes. Simulations of bit error rate (BER) performances are performed for WiMax systems with/without turbo codes. It is shown that about 4.3dB coding gain can be achieved by using a 1,11/13,15/13] turbo code with 5 iterations, and thus the required transmission power of WiMax system can be decreased. It is also demonstrated that the performances of turbo codes are improved by increasing the interleaver length and the iteration number.