High-Throughput Low-Complexity Link Adaptation for MIMO BIC-OFDM Systems

作者：Shin Cheolkyu^*; Kim Hyounkuk; Kim Kyeong Jin; Park Hyuncheol

来源：IEEE Transactions on Communications, 2011, 59(4): 1078-1088.

DOI：10.1109/TCOMM.2011.012711.100141

• Instantaneous bit error rate (I-BER)
• link adaptation (LA)
• limited feedback
• multiple-input multiple-output bit-interleaved coded orthogonal frequency division multiplexing (MIMO BIC-OFDM)
• spatial stream control

This paper introduces a new link adaptation (LA) approach called the adaptive modulation, coding, and spatial mode (AMCS) scheme for multiple-input multiple-output bit-interleaved coded orthogonal frequency division multiplexing (MIMO BIC-OFDM) systems. The AMCS technique can provide both minimal performance degradation and significant throughput gain by controlling the spatial streams. With this technique, we can derive a simple and accurate closed-form expression of an instantaneous bit error rate (I-BER). Based on the I-BER, the proposed AMCS scheme chooses an appropriate modulation, coding, and spatial mode (MCS) type that improves the system performance while satisfying the quality of service (QoS) requirement. A simplified MCS type search method is also proposed, which allows the receiver to effectively select a MCS type and then send it back to the transmitter by using only a small amount of information bits. The simulation results confirm the superiority of the proposed AMCS approach over conventional LA schemes in trading high-throughput for reduced complexity.

• 出版日期2011-4