Blind Channel Estimation Based Linear Precoding using
Published online: 2 September 2017
Ó Springer Science+Business Media, LLC 2017
Abstract MIMO-OFCDM is one of the emerging wireless communication technologies
which provide very high data rate transmission with multicarrier modulation technique.
OFCDM utilizes spatial diversity method that uses many transmitters and receivers to
transmit more than one data in the same frequency at the same time. This paper proposes
blind channel estimation based on Linear Precoding (LP) approach for 2 by 2 MIMO-
OFCDM broadband communication system. The uniqueness of the proposed method is to
estimate the channel response in blind fashion and minimize the BER in MIMO-OFCDM.
Linear Precoding based blind channel estimation is implemented to estimate the perfor-
mance of the MIMO-OFCDM for various parameters including different number of users,
three different modulations such as BPSK, QPSK and 16 QAM, two types of Spreading
Factors over AWGN and Rayleigh channels. The system performance is then compared
with the other existing methods. It is found that the blind channel estimation provides
better performance with minimum BER. It also suggests that the LP based blind channel
estimation in MIMO OFCDM system outperforms with QPSK modulation with more users
and high spreading factor over Rayleigh channel.
Keywords Blind channel estimation Á Linear precoding Á Spreading factor Á MIMO
OFCDM Á Walsh–Hadamard code
& J. Sujitha
Electronics and Communication Engineering Department, Sri Ramakrishna Engineering College,
Electrical Engineering Department, Government College of Technology, Coimbatore, India
Wireless Pers Commun (2017) 97:5969–5981