Spatial Multiplexing in Massive MIMO with QPSK
Ch. Vandana1, U.V. Sai Sasank2, K. Sai kumar3

1Ch. Vandana, Department of Electronics and Communication Engineering, VBIT, Hyderabad (Telangana), India.
2U.V. Sai Sasank, Department of Electronics and Communication Engineering, VBIT, Hyderabad (Telangana), India.
3K. Sai Kumar, Department of Electronics and Communication Engineering, VBIT, Hyderabad (Telangana), India.

Manuscript received on 18 April 2019 | Revised Manuscript received on 25 April 2019 | Manuscript published on 30 April 2019 | PP: 1684-1686 | Volume-8 Issue-4, April 2019 | Retrieval Number: D6803048419/19©BEIESP
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Abstract: Spatial modulation is a freshly proposed multiple–antenna transmission technique. SM provides data rates are enhanced in comparison to Single Input Single Output (SISO) systems and robust error performance although a extremely low system complexity. This can be done by a effortless coding method which creates a one–to–one mapping among blocks of message (data) bits to be broadcasted and the spatial positions of the transmitter antenna in the number of antennas present in array. The mixed gain of several antenna broadcast strongly depends on spacing between broadcasting antenna and receiver antenna synchronization. Inter channel interference (ICI) can be avoided by an algorithm at the receiver. The fundamental design is to map the information block of digital data bits to two message carriers: 1) From the constellation diagram a symbol is taken. 2) In the given set of transmit antennas an exceptional antenna number of transmitting was chosen. The antenna which is transmitting has lot of information due to this the spectral efficiency was increased. To retrieve the data block bits a maximum receive ratio combining algorithm is used at the receiver. It handles the base station which has numerous antennas in same time-frequency to provide lot of active users . Among its advantages in very short range areas the likelihood to focus energy of transmitted signal, which provides enormous progress in terms of system capacity. In this paper, as spatial modulation and massive MIMO are having its own disadvantages we can improve their efficiency by implementing spatial modulation in massive MIMO technology with the assist of QPSK modulation technique.
Keywords: QPSK, Massive MIMO, Spatial Modulation, Bit Error Ratio

Scope of the Article: Electronics and Communication