超寬帶Rake接收機在密集多徑信道下的性能
Performance of Ultra-wide Band Rake Receivers in Dense Multipath Channels
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摘要: 超寬帶信號在室內(nèi)環(huán)境中將經(jīng)歷密集多徑傳播,產(chǎn)生嚴重的時間彌敞。采用Rake接收是提高超寬帶接收機性能的重要手段。該文針對采用BPSK調(diào)制的超寬帶系統(tǒng),推導出密集多徑信道下Rake接收機的誤碼性能計算公式,揭示了Rake接收機性能與多徑信道參數(shù)以及脈沖波形自相關(guān)系數(shù)之間的關(guān)系。針對典型信道模型和脈沖給出了計算實例。
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關(guān)鍵詞:
- 超寬帶; Rake接收機; 多徑信道
Abstract: In indoor environments, ultra-wide band signals suffer from dense multipath propagation and severe time dispersion. Rake reception is an important way to boost the performance of ultra-wide band receivers. With the assumption that BPSK modulation is used, the equations used to compute BER performance of Rake receivers in dense multipath channels are derived. The BER performance is related to the multipath channel parameters and the pulse autocorrelation coefficients. With a typical channel model and specific pulse shapes, the computation has been done. -
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