Abstract
In this paper, the performance of the Multiple Input Multiple Output (MIMO) technique evaluated in term of Bit Error Rate (BER) with respect to Signal to Noise Ratio (SNR) by using Binary Phase Shift Keying (BPSK) modulation for two algorithms Maximum Likelihood (MLD) and Zero-Forcing (ZF) with different configurations of antennas array in Rayleigh and Additive White Gaussian Noise (AWGN) channels. The results were compared between them to determine which of the numbers antenna elements are suitable in the transmitter and receiver of each algorithm. The results of MLD offers a better configuration when 4×4 and 3×4 antennas array were used, while the ZF remains the same performance for the 2×2, 3×3 and 4×4 configurations. In different numbers of antennas, the best performance of ZF is got when the number of transmitter and receiver antennas are equal to 2×4 respectively. Also, the last one is better than the 4×4 and 3×4 configurations of MLD algorithm.
Highlights
MULTIPLE INPUT MULTIPLE OUTPUT TECHNIQUEIt has been demonstrated that: by utilizing Multiple Input Multiple Output (MIMO) is possible to boost the ability to a high extent
In simulation of Multiple Input Multiple Output (MIMO) antenna system, the Binary Phase Shift Keying (BPSK) modulation is used for data transfer in Rayleigh channel
When the number of antenna elements on both sides is equal, we find the performance of 4×4 giving the best performance at Eb/No 15dB but it will give a low data rate
Summary
It has been demonstrated that: by utilizing MIMO is possible to boost the ability to a high extent. The receiver uses two algorithms (MLD and ZF) to recover the information signal (Ali and et al 2013). Where the received signal on the first and second element represented by y1, y2, hi,j is the coefficient of the channel path from ith radiated antenna element to jth collected antenna element, and the second term 'n' is the AWGN term in the receiving antenna. 3. RAYLEIGH CHANNEL A small-scale fading that produced by multiple signal paths between the sender and the destination is discussed . Where the r(t) is the received signal, ai is an attenuation coefficients of each path, s(t) is the baseband transmitted data, τi is the delay time of each path, ej2πfct is the modulation carrier frequency. That if the signal transmitted from multiple antennas each signal will has its channel response in respect of each receiver antenna
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