摘要
传统信令传输方法将信令符号置于固定子载波传输而可靠性受限。提出了一种正交频分复用-时分双工(OFDM-TDD)开环自适应调制(AM)系统的信令传输方法,该方法将采用二进制相移键控(BPSK)的信令符号置于自适应块中信道条件最好的子载波,并在接收端利用BPSK的特殊性检测信令所在子载波而恢复出信令,从而保证信令的可靠传输。理论分析和仿真结果表明,该方法能够大大增强信令传输的可靠性,并提升系统吞吐量。
An orthogonal frequency division multiplexing - time division duplex （OFDM-TDD） open-loop adaptive modulation （AM） system is proposed. In this system signaling symbols modulated with binary phase shift keying （BPSK） are put on the best sub-carriers in adaptive blocks. In the receiver, signaling can be recovered after the sub-carriers carrying signaling are detected utilizing the specialty of BPSK. Theoretical analysis and simulation results indicate that, the proposed method can enhance reliability of signaling transmission greatly and improve system throughput.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2008年第6期832-835,共4页
Journal of University of Electronic Science and Technology of China
基金
国家863项目(2006AA01Z283)
关键词
自适应调制
开环
正交频分复用
时分双工
adaptive modulation
open loop
orthogonal frequency division multiplexing
time division duplex
