Wireless LAN Standards and Applications
Wireless LAN Standards and Applications
Adaptive Modulation over Nakagami Fading Channels
Wireless Personal Communications: An International Journal
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
Space-Time Codes and MIMO Systems
Space-Time Codes and MIMO Systems
Fundamentals of wireless communication
Fundamentals of wireless communication
Beyond 3G: wideband wireless data access based on OFDM and dynamic packet assignment
IEEE Communications Magazine
Capacity limits of MIMO channels
IEEE Journal on Selected Areas in Communications
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There are a few core technologies to enable high-performance 4th generation (4G) broadband wireless communication system. A multiple input multiple output (MIMO) provides high-rate transmission through expended channels by multiple array antennas in both sender and receiver side. Also orthogonal frequency division multiplexing (OFDM) is well-known as the most appropriate technique for high data rate transmission. Adaptive modulation and coding (AMC) changes a modulation order and coding rate according to channel conditions, so it is possible that the spectral efficiency is improved at the fixed error performance. Cyclic prefix (CP) is the one of the most important technique to OFDM system and is reducing inter-symbol interference (ISI) effects in high speed wireless mobile communication system. As consider the time varying channel condition, however, fixed CP length is not only increasing power consumption but also reducing data transmission rate. In this paper, we propose a multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with AMC and adaptive CP length to improve system capacity with maintaining good error performance. The results of computer simulation show the improvement of system capacity in Rayleigh fading channel.