自适应传输技术在MIMO-OFDM系统中的应用

Research on Adaptive Transmission Technique for MIMO-OFDM Systems

MIMO-OFDM技术具有频谱利用率高、抗频率选择性衰落能力强的优点,适合高速数据传输,自适应传输技术可以根据信道质量的好坏自适应调整传输方式,提高传输效率。本文介绍了OFDM和MIMO-OFDM技术,并论述了自适应传输技术以及各种自适应传输算法。

As a transmission technique, MIMO-OFDM is superior in utilizing frequency resources adequately, counteracting frequency selective dwindling of signals, so it is applied in transmitting data in a high speed. The adaptive transmission technique has such a virtue as choosing the transmission method adaptively according to the status of the channels, so as to improve the transmission efficiency. In this paper, the conception of OFDM and MIMO-OFDM are discussed, and the technology of self-adaptive transmission and kinds of algorithms are introduced and compared in detail.