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时间:2020-03-26
《《通信原理(第二版)》课后习题答案(孙学军主编).pdf》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、通信原理(第二版)课后习题答案孙学军主编附录B部分习题答案习题一1.14.8kbit/s1.21200B1.31.2kbit/s;9.6kbit/s1.47.2kbit/s1.5a)-51.62.5×10习题二2.1720kbit2.224kbit/s2.3(1)33.89kbit/s(2)1.66倍或2.2dB2.45kB2.5b)习题三3.1F()0.002S(0.001)a2A3.2(1)812A(2)cos(400)82A(3)[(400)(400)]82a3.4sint03.5ABn03.6Wn0习题四4.1200Wm0´4.425484.5(1)
2、f(t)50costm(2)f(t)50sintmm(3)100m4.663(t)3cos(210t2sin410t)FM4.8B110KHzFM4.9(1)3,B32kHz,B2kHzFMFMFM(2)3,B32kHz,B2kHzFMPMPM4.10B220kHz,B420kHzFMFM4.112.02MHz;4.02MHz;4.04MHz4.122MHz;4MHz;4MHz4.1320KHz;10KHz;120KHz4.14(1)16KHz;(2)6KHz24.15N6习题五5.1560kbit/s5.2(1)6.28ms;(2)1605
3、.3(1)n6(2)Vmax25V,Vmin7V5.4(1)B4KHz;(2)B12KHz;(3)B28KHz;PAMPCMPCM-5-32.07×10W;6.8×10W5.5(1)11100011;(2)010011000005.6-1344△;±32△5.7+432△5.8101110105.9(1)200个/s;(2)9bit;(3)1.8kbit/s;(4)900Hz5.10(1)32.4kbit/s;(2)10.8kB;(3)5.4kHz习题六6.1B=2/T6.2八进制:B=400HzRb=600bit/s二进制:B=400HzRb=200bit/s6.3Rb=160
4、0波特;B=3200Hz6.4B=4200Hz6.5
5、f2-f1
6、=1200Hz;B=3600Hz6.7B=3200Hz;Rb=600bit/s36.10B=400Hz;Rb=600bit/s6.1116kHz,4000B6.121MHz,500kB6.13Rb=3kbit/s6.14RB=4.8kB6.15f0.2kH,f1.1kH,B0.6kHZ0ZFSKZ6.16(1)四进制16个码元:2301131210331122;八进制11个码元:26135447532(2)RB2=1000(B);RB4=500(B);RB8≈333(B)(3)t2=64(ms);t4=32(ms);t8
7、=22(ms)6.17(1)Δƒ=200(Hz);ƒ0=1100(Hz);β=0.5;B2FSK=600(Hz)(2)Δƒ=1000(Hz);ƒ0=1500(Hz);β=2.5;B2FSK=1400(Hz)6.18(b)6.19(c)6.20(d)习题七7.1Wm=62.7rad/s(S/N)00DSB7.212.11(倍)或10.83dB(S/N)00AM7.3(a)P发=2000W(b)P发=4000WA95KHzf105Hz7.4(1)H(f)0其它(2)S/N1000(30dB)ii4(3)S/N2000(33dB)007.7(1)S/N3000(34.77dB)i
8、i(2)S/N2000(33dB)007.8S/N37500(45.74dB)007.9(1)H(f)199920KHzf100080KHz0其它(2)S/N16.7(12.2dB)ii(3)S/N18750(42.7dB)0022(4)(KD/A)Sns()mSnd()0m(5)(S/N)250(24dB)00AM(S/N)/(S/N)75(18.75dB)00FM00AM57.10WFM=1.95×10(rad/s)57.11(1)WPM=2.26×10(rad/s)(2)A=3.54(V)7.12A=1.317(V)7.1345.76
9、dB7.14152.5km7.151000W7.16(1)4500个;(2)(S0/N0)PCM=95(19.78dB)7.17pe=0.4387.18r=19.7(12.9dB)7.19111.59dB57.20110.87dB7.21114.6dB7.22113.9dB-4-47.230.359×10;1.85×10-6-57.254×10;2.25×10习题八8.1(1)BAM=8NKHz;
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