超寬帶通信的正交正弦相關接收方法
基金項目:
國家自然科學基金重大項目(60496314)資助課題
Orthogonal Sinusoidal Correlation Receiver in UWB Communication
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摘要: 超寬帶通信中，實現窄于1ns的脈沖信號的準確接收是個很大的挑戰(zhàn)。目前很多文獻都是采用匹配濾波器的方法進行接收，并在此基礎上分析性能。但由于匹配濾波器輸出的相關峰的寬度太窄，因而系統(tǒng)對定時抖動較為敏感。定時偏差較大時，接收性能將急劇下降。而且對各路隨機定時的多徑信號進行相關接收也是一個很大的難題。該文提出一種新的超寬帶脈沖接收方法，該方法允許較大的定時偏差，并且能夠提供多路隨機定時的相關模板，同時接收信噪比的損失被控制在一個可接受的水平。
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關鍵詞:
- UWB;正交正弦相關;定時誤差;信噪比
Abstract: It is a great challenge in UWB communication systems to receive the subnanosecond pulses properly. Most literatures analyzed the performance of UWB systems based on match filter receiver. But the system performance will degrade greatly when there is big timing error. And the match filter receiver can hardly provide several correlation templates with different timings. In this paper, a novel method to receive the subnanosecond pulses is proposed. This method is tolerant against timing error, and can provide correlation templates with different timings. In addition, the performance degradation of this receiver is acceptable. -
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