基于FFT解調(diào)的短波FH-DQPSK系統(tǒng)信道比特誤碼率的估計(jì)
Bit-error-rate\s estimation on FFT-based demodulator in short-wave FH-DQPSK system
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摘要: 該文基于FFT的短波FH-DQPSK系統(tǒng)解調(diào)技術(shù),并根據(jù)瑞利衰落信道下短波跳頻系統(tǒng)DQPSK信號的偽誤碼率估計(jì),提出了一種采用自適應(yīng)的線性外推方法來估算信道比特誤碼率,同時(shí)分析了該誤碼率估算方法的置信度。最后,通過數(shù)值模擬結(jié)果表明:采用該方法估算的系統(tǒng)監(jiān)測性能明顯優(yōu)于無外推時(shí)的性能。
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關(guān)鍵詞:
- 短波; FFT解調(diào); 偽誤碼率; 線性外推; 置信度
Abstract: Based on a kind of short-wave FH-DQPSK system demodulating technology of FFT and according to PER estimation in the DQPSK system with Rayleigll fading channel,this paper proposes a method to estimate BER using adaptive linear extrapolation algorithm, and analyses the confidence level about this method.The numerical simulated results show that the performance of this method is superior to the estimating method without using extrapolation algorithm. -
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