Dsp Implementation of channel estimation algorithms for OFDM systems

Abstract

The channel estimation based on the block - type, comb-type and lattice-type structure is studied. The Block type pilot structure is performed on every block of OFDM symbols and the Comb type pilot arrangement is performed on every OFDM symbol. Which are inserted particular data intervals. Comb-type and block type spectrums are verified and the bit error rate is compared. The objective of this thesis is to implementation channel estimation algorithm OFDM system implementation of the C6713 Digital Signal Processor (DSP) of Texas Instruments (TI). First, the basic channel LS and MMSE channel estimation techniques implemented and LMS, NLMS and RLS were implemented and tested using Simulink Next this model is an implementation on DSP C6713. Finally a comparison of the implemented estimator and compared BER values and mean square error estimated in LMS NLMS and RLS algorithms performed.