利用電荷耦合器件的PCM匹配濾波器
A MATCHED FILTER USING CCD FOR PCM
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摘要: 正 (一)引言 1943年,人們從最大信噪比準(zhǔn)則出發(fā),建立了最佳線性濾波理論匹配濾波理論。但在實(shí)際工作中,要實(shí)現(xiàn)最佳線性濾波是很困難的,因而只能采用所謂準(zhǔn)最佳線性濾波器來(lái)解決。對(duì)于脈碼調(diào)制的脈沖序列,構(gòu)成實(shí)際的匹配濾波器是可能的。本文采用電荷耦合器件(CCD)作為延時(shí)環(huán)節(jié),實(shí)現(xiàn)了PCM脈沖序列的匹配濾波器。實(shí)驗(yàn)結(jié)果表明,這種匹配濾波器對(duì)PCM信號(hào)進(jìn)行最佳檢測(cè)是可行的。對(duì)于矩形脈沖調(diào)制
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關(guān)鍵詞:
Abstract: A matched filter using CCD for PCM is made. The experimental results of output waveform, transfer function and output signal-to-noise ratio are given and comparisons are made with the theoretical results. The non-return-to-zero codes are realized with the output signal-to-noise ratio being 1 dB below the theoretical value. -
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