Abstract
MIMO Constant Envelope Modulation (MIMO-CEM) is presented as a promising alternative candidate for the commonly used MIMO Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system due its fabulous capability in both of power and complexity. This improvement in performance is gained due to using efficient non-linear power amplifier at transmitter and 1-bit Analog to Digital Converter (ADC) sampled at the Intermediate Frequency (IF) in the receiver side. However, despite system's design provides low power consumption and low design complexity, a great reduction in Bit Error Rate (BER) performance is introduced. This was a result of using 1-bit ADC sampled in the IF which caused severe quantization noise. Therefore, a suitable channel coding technique become inevitable to overcome this BER performance degradation. In this paper, a selective channel coding method is studied for MIMO-CEM system is done to improve high BER problem of the MIMO-CEM system. The evaluation of this study was done over a multi-path Rayleigh fading channel with both Minimum Shift Keying (MSK) modulation and Gaussian Minimum Shift Keying (GMSK) modulation. The simulation results show a significant improvement in the BER performance at low values of Signal to Noise Ratio (SNR) when LDPC channel coding is used, while the Convolutional Code (CC) with Viterbi Decoder achieves the best BER performance at high SNR values.
Published Version
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