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SEO外链 / 教育培训 / 奥本海姆《信号与系统》（第2版）全套资料【教材+笔记+题库】

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奥本海姆《信号与系统》（第2版）全套资料【教材+笔记+题库】

版块：教育培训类型：普通作者：精勤学习网查看：115265 回复：0 获赞：0 时间：2020-06-05 12:25:56

为了方便大家学习奥本海姆《信号与系统》，黄老师整理了以下资料！更多考研复习资料|考试大纲|模拟试题|历年真题|视频网课等请到精勤学习网查看。

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全套资料包括以下：

奥本海姆《信号与系统》（第2版）笔记和课后习题（含考研真题）详解（上册）

奥本海姆《信号与系统》（第2版）笔记和课后习题（含考研真题）详解（下册）

奥本海姆《信号与系统》（第2版）配套题库【考研真题精选＋章节题库】（上册）

奥本海姆《信号与系统》（第2版）配套题库【考研真题精选＋章节题库】（下册）

奥本海姆《信号与系统》（第2版）教材（电子工业出版社）

笔记试看

第1章　信号与系统

1.1　复习笔记

一、连续时间和离散时间信号

1连续时间信号和离散时间信号

（1）连续时间信号（图1-1（a））

①定义

连续时间信号是指自变量连续可变的信号，信号在自变量的连续值上都有定义。

②表示方法

自变量用t表示，表示连续时间。连续时间信号表示为x(t)。

（2）离散时间信号（图1-1（b））

①定义

离散时间信号自变量仅取在一组离散值的信号，信号仅定义在离散时刻点上。

②表示方法

自变量用n表示，表示离散时间。离散时间信号表示为x[n]。

（a）连续时间表示；（b）离散时间信号

2．信号能量与功率

（1）有限区间内信号的总能量与功率

①连续时间信号x(t)在

内的总能量

其中|x|记为x（可能为复数）的模。将上式除以长度t2－t1就可得到其平均功率。

②离散时间信号x[n]在

内的的总能量

将其除以区间内的点数

就得到在该区间内的平均功率。

（2）无穷区间的信号总能量与功率

①连续时间信号x(t)在无穷区间的总能量

无限区间内连续时间信号x(t)的平均功率

②离散时间信号x[n]在无穷区间的总能量

无限区间内离散时间信号x[n]的平均功率

（3）根据信号能量和功率的有限性分类

①信号具有有限的总能量，即

，这种信号的平均功率为零。

②平均功率P∞有限的信号，其能量无穷大。

③P∞和E∞都无限的信号。

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background-color: rgb(255, 255, 255);">内的总能量<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic2.zhimg.com/80/v2-7c2422c2b8d52302a0d9f7c79ea5787d_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="60" data-rawheight="29" class="content_image lazy" width="60" data-actualsrc="https://pic2.zhimg.com/v2-7c2422c2b8d52302a0d9f7c79ea5787d_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">其中|x|记为x（可能为复数）的模。将上式除以长度t2－t1就可得到其平均功率。<p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">②离散时间信号x[n]在<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic2.zhimg.com/80/v2-0b7750e25af753d5aaf7246afa1bc7bd_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="56" data-rawheight="11" class="content_image lazy" width="56" data-actualsrc="https://pic2.zhimg.com/v2-0b7750e25af753d5aaf7246afa1bc7bd_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">内的的总能量<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic1.zhimg.com/80/v2-2ca0aecbdba89021426f139715380454_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="62" data-rawheight="37" class="content_image lazy" width="62" data-actualsrc="https://pic1.zhimg.com/v2-2ca0aecbdba89021426f139715380454_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">将其除以区间内的点数<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic4.zhimg.com/80/v2-f0a6ee80d333d666b021ed193a537f6b_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="65" data-rawheight="13" class="content_image lazy" width="65" data-actualsrc="https://pic4.zhimg.com/v2-f0a6ee80d333d666b021ed193a537f6b_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">就得到在该区间内的平均功率。<p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">（2）无穷区间的信号总能量与功率<p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">①连续时间信号x(t)在无穷区间的总能量<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic4.zhimg.com/80/v2-f91043783d4492e471f131b13420d6fb_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="189" data-rawheight="27" class="content_image lazy" width="189" data-actualsrc="https://pic4.zhimg.com/v2-f91043783d4492e471f131b13420d6fb_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">无限区间内连续时间信号x(t)的平均功率<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic3.zhimg.com/80/v2-533ac3c0292e0ea4e29cad6b5713707a_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="133" data-rawheight="27" class="content_image lazy" width="133" data-actualsrc="https://pic3.zhimg.com/v2-533ac3c0292e0ea4e29cad6b5713707a_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">②离散时间信号x[n]在无穷区间的总能量<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic4.zhimg.com/80/v2-0f3e20483cd9cbab25a579d8f96aa77f_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="190" data-rawheight="32" class="content_image lazy" width="190" data-actualsrc="https://pic4.zhimg.com/v2-0f3e20483cd9cbab25a579d8f96aa77f_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">无限区间内离散时间信号x[n]的平均功率<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic3.zhimg.com/80/v2-761801a6bafb468241c70dba7b5edcde_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="145" data-rawheight="30" class="content_image lazy" width="145" data-actualsrc="https://pic3.zhimg.com/v2-761801a6bafb468241c70dba7b5edcde_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">（3）根据信号能量和功率的有限性分类<p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">①信号具有有限的总能量，即<figure data-size="normal" style="margin: 1.4em 0px; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);"><img src="https://pic2.zhimg.com/80/v2-2fdb7cf18998b1c90224a6d17b6c62ad_720w.jpeg" data-caption="" data-size="normal" data-rawwidth="49" data-rawheight="13" class="content_image lazy" width="49" data-actualsrc="https://pic2.zhimg.com/v2-2fdb7cf18998b1c90224a6d17b6c62ad_b.jpeg" data-lazy-status="ok" style="display: block; margin-right: auto; margin-left: auto; background-color: transparent; animation: 0.5s ease-in 0s 1 normal none running fxRichTextFadeIn;"></figure><p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">，这种信号的平均功率为零。<p style="margin-top: 1.4em; margin-bottom: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">②平均功率P∞有限的信号，其能量无穷大。<p style="margin-top: 1.4em; color: rgb(26, 26, 26); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif; background-color: rgb(255, 255, 255);">③P∞和E∞都无限的信号。

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