调制就是把信号形式转化成适合在信道中传输的一种过程.其具体过程就是用基带信号去控制载波.信号调制分为振幅调制(Amplitude Modulation,AM)、频率调制(Frequency Modulation,FM)、相位调制(Phase modulation,PM). uPM(t)=UCcos(wct+mpcosΩt) (1) 调幅在有线电或无线电通信和广播中应用甚广.调幅波的表达式为:...
Passband modulation Analog modulation AM · SSB · QAM · FM · PM · SM Digital modulation FSK · MFSK · ASK · OOK · PSK · QAM MSK · CPM · PPM · TCM · SC-FDE Spread spectrum CSS · DSSS · FHSS · THSS See also: Demodulation, modem, line coding, PAM, PWM, PCM ...
ambiguity diagram for linear fm sonar: russo donato m. and charles l. bartberger, 1965. j. acoust. soc. am., 38 (2): 183–190.doi:10.1016/0011-7471(76)91134-7NoneDeep Sea Research and Oceanographic AbstractsDeep Sea Research and Oceanographic Abstracts...
FM指载 波的瞬时角频率偏移随调制信号的变化而线性变化,PM指载波的瞬时相位偏移是调 制信号的线性函数。正弦波的频率的变化会引起相位的变化,同样,相位的变化也会 引起频率的变化,两者的变化均为角度变化,所以统称为角度调制。在角度调制中已 调信号的频谱不再是调制信号频谱的线性搬移,会产生许多新的频谱成分。
It contains mixers and IF amplifiers for AM and FM, fully integrated VCO and PLL synthesizer, IF-processing including adaptive bandwidth control, stereo decoder and RDS decoder on a single chip. The utilization of digital signal processing results in numerous advantages against today's tuners: very...
modulation (FM) detector is achieved. By integrating the FM signal with integrator 23, the FM signal is converted to a PM signal which appears at terminal 24. Since for AM stereo, the radio transmitter was phase modulated with the L-R stereo information and pilot, the signal at terminal ...
NJM2590V(TE1) NJRC Telecom IC, Bipolar, PDSO14 获取价格 NJM2590V(TE2) NJRC Telecom IC, Bipolar, PDSO14, 获取价格 NJM2591 NJRC 100MHz INPUT 450kHz FM IF DEMODULATOR IC FOR VOICE 获取价格 NJM2591V NJRC 100MHz INPUT 450kHz FM IF DEMODULATOR IC FOR VOICE 获取价格 NJM...
4. Electro-Opticalcharacteristic Diagram 5. Rankof WH603R 6. Reliabilitytests 7. Packing 8. Soldering 9. Precautionfor use Rev. 00 September 2008 www.ZLED.com Document No. : SSC-QP-7-07-24 (Rev.00) AM101-DP AM101-DP Description ...