第七章 角度调制与解调

1、End( )( )( )cosccfcmttk utt 00( )( )ttd 00( )( )ttd 0( )( )sinsin( )tmccfctdtttmtt mfmsin( )cos(sin)RefejmtjtFMCcfCutUtmtU ee0( )( )sinsin( )tmccfctdtttmtt sinfjmtesin()fjmtjn tnfneJme20( 1) ()2()!()!fnnmnfmmJmm nm012345678910111.0Jn(mf)J0J1J2J3J4J5J6J7J8J9J10mf()( )Re()()cos()c

2、jt n tFMCnfnCnfcnutUJmeUJmnt 2(1)sffBmmFtmttttukttttpcmcpcccoscos)()()()coscos()(tmtUtupccPMppmmUk( )( )sinsincpcmdttmttdt UkmppmEndttmUtmtUtmtUucpcpccpccPMsin)cossin()coscos(cos)coscos(ttmUtmtUtmtUucpcpccpccPMsin)cossin()coscos(cos)coscos(ttmUtUucpcccPMsincoscos)(tukd)(cos)(costuktUtUucdccccEnd0(1)

3、jCCuu0(1)jCCuuu0(1)jCCuuQQUUuUUm/)/(U/2/211( )(1cos)(1cos)cjQtmtmtLCLC /2/211( )(1cos)(1cos)cjQtmtmtLCLCQcLC1( )(1cos)( )cctmtt )()/()()(tuuUtutQc)(tu/2/211( )(1cos)(1cos)cjQtmtmtLCLC222( )(1)cos8 22(1)cos28 2coscos2ccccccmmtmmtmttt 222( )(1)cos8 22(1)cos28 2coscos2ccccccmmtmmtmttt 8/) 12/(2ccmcc2/c

4、mm8/) 12/(22cmm221(1)4 2mfmKmcm8/) 12/(2ccm2/cmm8/) 12/(22cmm2/cmmQQjjCtmCCCCCCCCCC)cos1 (2212212/1221)cos1 (1)(QQCtmCCCCLLCt221222221( )(1coscos)coscos222ccccctAmtA mtAAmAmtmt 221222221( )(1coscos)coscos222ccccctAmtA mtAAmAmtmt 2cos2cos2)(212tmAtAmAmftfc图图7.3.5 Cj与固定电容串、并联后的特性与固定电容串、并联后的特性 1012()qq

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6、212tUUUtUUUUUtUee)(sin1)(121tUUUtUe)(tUkudo)(te)(te)(sin1)(121tUUUtUe21111fUIrj LZ1111fUIrj LZ11112UkULMIMjU1221211jAAUUUej2I2U （2）相位相位幅度变换幅度变换2U1U21122122DDUUUUUU2U1U12DDUU2DU1DU2121DDdoooUUKuuu2121DDdoooUUKuuu2()(4 )mmmmCCkCCC CC102111111212111emmQRAUCUjCUjCUjkQUjjjjj211111()()11111()jCjQLCRLH jjj CjCRL211111