Abstract
Background:Single user Massive Multiple Input Multiple Output (MIMO) can be used to increase the spectral efficiency since the data is transmitted simultaneously from a large number of antennas located at both the base station and mobile. It is feasible to have a large number of antennas in the mobile, in the millimeter wave frequencies. However, the major drawback of single user massive MIMO is the high complexity of data recovery at the receiver.Methods:In this work, we propose a low complexity method of data detection with the help of re-transmissions. A turbo code is used to improve the Bit-Error-Rate (BER).Results and Conclusion:Simulation results indicate a significant improvement in BER with just two re-transmissions as compared to the single transmission case. We also show that the minimum average SNR per bit required for error-free propagation over a massive MIMO channel with re-transmissions is identical to that of the Additive White Gaussian Noise (AWGN) channel, which is equal to -1.6 dB.
Highlights
The main idea behind single user massive Multiple Input Multiple Output (MIMO) [1 - 7] is to increase the bit rate between the transmitter and receiver over a wireless channel
The signal at each receive antenna is a linear combination of the bits or symbols sent from all the transmit antennas plus Additive White Gaussian Noise (AWGN)
In Fig. (3), we present the simulation results for a 4-state turbo code with generating matrix given by
Summary
The main idea behind single user massive Multiple Input Multiple Output (MIMO) [1 - 7] is to increase the bit rate between the transmitter and receiver over a wireless channel. This is made possible by sending the bits or symbols (groups of bits) simultaneously from a large number of transmit antennas. Single user Massive Multiple Input Multiple Output (MIMO) can be used to increase the spectral efficiency since the data is transmitted simultaneously from a large number of antennas located at both the base station and mobile. The major drawback of single user massive MIMO is the high complexity of data recovery at the receiver
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