The Research On Turbo Code Scheme And It's Realization Using DSPs

The noises in the radio channel will currupt the signal in many kinds of communication systems.The corresponding errors will appear at the receiver.So error-correcting coding technology is an important part in an efficient communication and an interesting field studied by scholars.Turbo coding scheme, presented in 1993,can perform well at lower SNR.Based on former documents,this paper analyses the coding steps,outline and compare two iterative algorithm,explain the good performance in several aspects. Simul -ation demonstrates the same results .A new scheme can improve old performance and simplify computation in the decoding process.Because of ultra function this scheme is difficult being realization by hardware.TI's DSP can be used in the fast computation. This paper list the characteristic of the TMS320C62 hardware and option principle of the software IDE CCS,write the program with standard C,get the optional information and evaluate the capability of the decoder and the use efficiency of the CPU. The DSP can be used in turbo code timingly.