Ka频段ATC-OFDM传输体制的性能分析  

Performance analysis of ATC-OFDM transmission scheme at Ka band

作　　者：王艳岭[1] 达新宇[1] 谢铁城[1] 申勇[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《燕山大学学报》2010年第6期533-536,541,共5页Journal of Yanshan University

基　　金：国家自然科学基金资助项目(60802053);陕西省自然科学基金资助项目(2009JM8001-3)

摘　　要：分析了Ka频段移动信道特性,建立了Ka频段自适应Turbo编码-OFDM传输体制(ATC-OFDM),并提出了3种自适应方案和相应算法。通过新传输体制中的自适应功率、自适应调制和自适应功率调制同固定分配功率和调制方案的TC-OFDM传输体制相比,在不同的天气环境下,其系统误码性能有着明显的改善。系统的吞吐量在信噪比大于8dB时,相比于BPSK调制,可提高2bps/Hz,验证了该传输体制的可行性和有效性。The mobile channel characteristic of the Ka band is analyzed in this paper.The ATC-OFDM transmission scheme and three algorithms at Ka band are also proposed.Compared with the fix power and modulation in TC-OFDM transmission scheme,the adaptive power,adaptive modulation and adaptive power-modulation in the new transmission scheme could reduce BER significantly in different environmental conditions.Compared with the fix BPSK modulation,the throughput of the new transmission scheme can increase 2 bps/Hz when the SNR is bigger than 8 dB,so that the feasibility and validity of the new transmission scheme can be testified.

关 键 词：KA频段 信道模型 自适应 TURBO码 正交频分复用 

分 类 号：TN927.2[电子电信—通信与信息系统]