• Masthan-E-Shahina Shaik
• A.Madhusudhanarao
• G.Parnesh
• A.V.Ramanaiah
• K.Sreenivasulu

Due to the influence of the wireless generation environment in the transmission operation, there are different academic degrees of fading and delay, which results in the distortion of the symbols for the MIMO-OFDM system. For purpose of effectively overcoming the interference and distortion, the receiver needs to achieve accurate channel characteristics and also wireless channel has to exhibit sparse characteristics. so accurate and fast channel estimation is the core part of the stable wireless communication system. Therefore, the main disadvantage of existing SAMP algorithm is to obtain sparsity level of the signal and get priori knowledge because of changeable environment. So to increase the accuracy and reduce the time of channel approximation we proposed a new adaptive matching pursuit (NAMP) algorithm. The main aim of this algorithm is to select the atoms with a stable step size and remove the components of small energy by Singular Entropy order determination (SEOD) in the sparse solutions. First, NAMP does not require any priori-knowledge of the sparseness level. Second, to increase the efficiency of signal recovery we have to determine the fixed step size of the signal. Finally our proposed NAMP algorithm provides less computational complexity and achieves more stable performance than the existing SAMP algorithm.

MIMO-OFDM, New Adaptive Matching Pursuit, SAMP, Compressed sensing, Singular Entropy Order Mechanism.

"MIMO – OFDM CHANNEL ESTIMATION BASED ON A SPARSE RECOVERY-NAMP ALGORITHM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.103-108, April-2019, Available :http://www.jetir.org/papers/JETIRBC06016.pdf

"MIMO – OFDM CHANNEL ESTIMATION BASED ON A SPARSE RECOVERY-NAMP ALGORITHM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp103-108, April-2019, Available at : http://www.jetir.org/papers/JETIRBC06016.pdf