OFDM系统中自适应比特分配算法分析  

Analysis of Adaptive Bit Allocation Algorithm in OFDM System

作　　者：李秀朋[1] 徐信[1,2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]解放军理工大学通信工程学院,江苏南京210007

出　　处：《无线电通信技术》2009年第4期11-13,共3页Radio Communications Technology

摘　　要：对单用户OFDM系统的3种自适应比特加载算法:Hugehes-Hartogs比特功率梯度分配算法、Chow算法和简单分块加载(SBLA)算法进行了仿真,分析比较了3种算法的复杂度和抗噪声性能。仿真结果表明:每种算法各有其优缺点和适用情况,可以根据不同的工程需求选择不同的算法。Hugehes-Hartogs算法能使系统发射总功率达到最低;Chow算法具有较好的抗噪声性能;SBLA算法的性能介于上述2种算法之间,并且具有较低的复杂度。In the research of adaptive bit allocation algorithm in single OFDM system, the following three algorithms such as Hugehes- Hartogs bit power grad allocation algorithm, Chow algorithm and single block loading algorithm （SBLA） are simulated, and the anti-noise performance as well as complexity of the three algorithms are analyzed and compared through simulations. The simulation results show that the different algorithm has its own advantage and application instance. We can select one of them according to different projection needs. The Hugehes-Hartogs algorithm makes the system have the lowest transmit power;the Chow algorithm has the better performance;the performance of the SBLA algorithm that has the lower complexity is between the aforementioned two algorithms.

关 键 词：OFDM 比特分配 Hugehes-Hartogs算法 Chow算法 SBLA算法 

分 类 号：TN911[电子电信—通信与信息系统]