提出了一種自適應比特和功率分配的寬帶MISO/OFDM傳輸系統，建立了寬帶MISO/OFDM傳輸系統的模型，并對該系統的最大子載波信噪比性能進行了分析。仿真結果表明：在多徑衰落信道下，與沒有采用自適應比特和功率分配的傳統發射分集OFDM傳輸系統相比，該系統的誤比特性能得到了明顯的提高。
關 鍵 詞 多輸入單輸出/正交頻分復用; 傳輸系統; 自適應比特分配; 自適應功率分配

Abstract In this paper, we propose a broadband MISO/OFDM transmission system with adaptive bit and power allocation. The model of proposed system is established. The performance of maximal SNR on each sub-carrier of proposed system is analyzed. The simulation results show that the proposed system can achieve better performance compared to that of the conventional adaptive transmit diversity based OFDM systems without adaptive bit and power allocation over multipath fading channels.
Key words multiplex input single output/orthogonal frequency division multiplexing; transmission system; adaptive bit allocation; adaptive power allocation