第3章-信道与信道容量ppt课件.ppt

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1、2022-7-2612022-7-2622022-7-2632022-7-2642022-7-2652022-7-2662022-7-2672022-7-26811pppPp2022-7-269111212122212mmnnnmppppppppPp2022-7-26102221/2iy aip y ae2022-7-26112022-7-2612 11/;/lognmjiijiijjp baI X Yp ap bap b2022-7-26132022-7-2614()max (; )ip aCI X Y ()11/max/loginmjiijip aijjp bap ap bap b()()

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4、0.2p bp bp b 0H Y12 /0.036/iCH YH Y abit符号2022-7-26281212p ap a1111336611116363P11116612121111126126XYP 123411431164p bp bp bp b /(; )/1 1 1 11 1 1 1 ,0.041 3 4 4 63 3 6 6ibitCI X YH YH YXH YH Y aHH符号2022-7-2629121log,logrskkkCnH p ppNM0.50.30.20.30.50.20.50.30.2,0.30.50.2 1111336611116363P2022-7-26

5、302022-7-26312022-7-2632111/LLLlllpp YYXXp YXYX/LppxXyY2022-7-2633 /;/log/logLLLLLLX YX YXYXpIH XH XYpppH YH YYXXYp YXp1;LlllII X YX Y1;LlllII X YX Y 1max;XLLPlX YCIC l LC l2022-7-263422222222111111111111ppppppppppppPpppppppppppp2log/CnH YX2022-7-2635111/LLLlllpp YYXXp YXYX2022-7-26362022-7-2637 max

6、;max/ccp xp xCI X YHYHYX 21maxlog22cp xHYe 2022-7-2638 21max;1log 1/2p xLlllCI X YPbit L维2022-7-26392022-7-26400log 1log 1StPCWWSNRWN2022-7-26410log 1log 1StPCWWSNRWN2022-7-264201/, /1.6SCbit sPNdB 当时0lim/ln2SWPCCbit sN /log 1/tC WSNRbits Hz2022-7-26430log 1log 1StPCWWSNRWN3.3 log 1 10022/kbit s2022-7-26442022-7-26452022-7-2646;1CI X YI X YCC 1logH Xn 2022-7-26472022-7-26482022-7-2649