International Journal of Scientific & Engineering Research, Volume 6, Issue 8, August-2015 1658 ISSN 2229-5518 IJSER © 2015 http://www.ijser.org Secure voice frequency signal transmission in 3D MIMO encoded 4 x 2 mmWave wireless communication system Mousumi Haque 1 , Shaikh Enayet Ullah 2 and Md. Rezaul Islam 2 1 Department of Information and Communication Engineering(ICE), University of Rajshahi, Rajshahi, Bangladesh 2 Department of Applied Physics and Electronic Engineering(APEE), University of Rajshahi, Rajshahi, Bangladesh Abstract - In this paper, we made a comprehensive BER performance simulative study on encrypted voice frequency signal transmission in a 3D MIMO encoded 4 x 2 mmWave wireless communication system. The simulated system under investigation implements various types of modern and classical channel coding schemes such as Repeat and Accumulate(RA), cyclic redundancy check(CRC), Bose–Chaudhuri–Hocquenghem(BCH), low-density parity check (LDPC), AES Block Cipher aided and ½-rated Convolutional. Based on the simulation result with MATLAB, it is quite noticeable that the simulated system is highly robust in retrieving transmitted data under mmWave MIMO fading channel in QAM digital modulation and LDPC channel coding schemes. Index Term - 3D MIMO, modern and classical channel coding schemes,, Bit Error rate (BER), AWGN and mmWave MIMO channel ——————————  —————————— 1. Introduction Wireless communication has become pervasive in our world and is acting as a transformative medium allowing our work, education, and entertainment to be transported without any physical connection. With tremendous development in telecommunication sector, it is being observed that nearly 50% of the traffic in cellular networks today is video. Due to explosive demand for high quality video streaming from mobile devices (e.g., tablets, smart-phones), the mobile network operators (MNOs) are facing unprecedented challenge to offer higher data rates that can keep up with this demand for high quality video. With the ever increasing demands in higher data rate, there is a growing interest in exploiting massive amount of unlicensed millimeter-wave spectrum ( 30-300 GHz), for next generation(5G) Network. The mmWave wireless communication can be treated as an enabling technology that has myriad applications to existing and emerging wireless networking deployments. The first step in a mmWave communications revolution is 60 GHz WPAN and WLAN deployment. To accommodate continued growth in the Internet and cloud-based applications, Internet service providers and major Web portals are building thousands of data centers each year. Data centers are used by all major Internet companies, including Google, Microsoft, Yahoo, and Amazon, to distribute processing, memory storage, and caching throughout the global Internet. The mmWave wireless communication using 60 GHz can be effectively used in Data centers. Future users of wireless devices will greatly benefited from the pervasive availability of massive bandwidths at mmWave frequencies. Multi-Gbps data transfers will enable a lifetime of content to be downloaded on-the-fly as users walk or drive in their daily lives[1-3] In this present paper, an effort has been made to study the performance of a simulated mmWave wireless communication under utilization of a robust and efficient space-time block coding scheme (3D MIMO). 2. System Model and Signal detection In our present simulation based study, a MIMO transmission with 4 transmit and 2 receive antennas over flat mmWave fading channel has been considered. With extracted binary data from a segment of recoded audio signal, the data are channel coding using various channel coding schemes discussed briefly in preceding section and subsequently interleaved prior to converted into block wise digitally modulated complex symbols consisting of eight consecutive symbols s1 , s2 .........s8 . The 3D MIMO code can explicitly written as: IJSER