Interference Cancellation in Broadcast Channel of Multiuser MIMO system using Block Diagonalization and Dirty Paper Coding Schemes

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2017 by IJETT Journal
Volume-48 Number-3
Year of Publication : 2017
Authors : Dr. Dalveer Kaur, Neeraj Kumar
DOI :  10.14445/22315381/IJETT-V48P228


Dr. Dalveer Kaur, Neeraj Kumar "Interference Cancellation in Broadcast Channel of Multiuser MIMO system using Block Diagonalization and Dirty Paper Coding Schemes", International Journal of Engineering Trends and Technology (IJETT), V48(3),157-160 June 2017. ISSN:2231-5381. published by seventh sense research group

In Multiuser MIMO system, multiple antennas are placed on base station and also on multiple users. Multiple antennas technique enhanced the performance parameters like reliability and data rate of wireless communication system without required more bandwidth, multiple antennas at transmitting and receiving end provides transmitting and receiving diversity, diversity increases the reliability of signal and spatial multiplexing increases the data rate by transmitting multiple information streams between transmitter and receiver. The base station transmits multiple streams to mobile station through downlink channel, known as broadcast channel and mobile users also transmit multiple streams to base station through uplink channel, known as multiple access channel. This paper considers only broadcast channel, the major issue in information transmission in broadcast channel is that the desired signal on the receiving side is affected by other user interference as well as inter-antenna interference. So, interference cancellation schemes on the transmitting end plays very important role to reduced interference on receiving end in multiuser MIMO wireless communication system. This paper discusses two interference cancellation schemes, Block Diagonalization (BD) and Dirty Paper Coding (DPC). Block Diaganalization is linear precoding technique that is used at transmitting end and it uses singular value decomposition operation to get block diagonalization precoding weights. Dirty Paper Coding is non-linear precoding technique; this technique is applied only when channel gains are completely known at transmitting end. This paper also shows performance comparison of block diagonalization and dirty paper coding schemes in term of Bit Error Rate.


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Multiuser MIMO, Block Diagonalization, DPC.