Figure 1.1 shows the block diagram of the invention. The non-limited FM signal F1 is mixed to form the less modulated FM signal F20. It passes at least through a filter with narrow bandwidth and goes to the limiter as F21. The limited signal F22 is demodulated in an FM demodulator of ...
Block diagram类似于TCP/IP协议栈中的数据链路层,上层的RFID标签数据经过硬件层的封装之后,形成1/0 bit流,通过DA转换器形成模拟射频波信号,通过空气介质在标签和阅读器之间传播 1. the analoginterfacehandles the modulation and demodulation of the analog signals2. the contactless UART handles the protocol requir...
图 1 FM解调方案设计框图Fig.1 Block diagram of FM demodulation3 软件解调算法的数学模型3.1 数字鉴相数字鉴相采用的是 CORDIC 算法。收到前端送来的基带 I、 Q 信号后 ,首先要完成的就是从每对 I
图1 FM解调方案设计框图Fig.1BlockdiagramofFMdemodulation3 软件解调算法的数学模型3.1 数字鉴相数字鉴相采用的是CORDIC算法。收到前端送来的基带I、Q信号后,首先要完成的就是从每对I、・24・第50卷第3期2010年3月电讯技术TelecommunicationEngineeringVol.50 No.3Mar.2010Ξ收稿日期:2009-11-27;修回日期:...
Many systems worked together for communication, but I'm focusing on a single module: the voice detector inside the premodulation processor that performed the FM demodulation. The block diagram below shows the operation of the voice detector; I've grayed out the data detector.6 The input ...
Functions •ASK Modulation and Demodulation •Video Signal FM Modulation and Demodulation •Video Signal Emphasis and De-emphasis Function •Drop-Out Detecting Function of Video FM Signal •FM Mute Function at Second-Call MAXIMUM RATINGS(T A = 25°C)Parameter Symbol Conditions Ratings Unit M...
一种通用宽带FM解调电路的设计
The FM Broadcast modulator includes the functionality of the baseband FM modulator, pre-emphasis filtering, and the ability to transmit stereophonic signals. The algorithms which govern basic FM modulation and demodulation are covered incomm.FMModulator. ...
MHz MHz Vp-p 2.1 Vp-p -20 dB -20 dB -50 dB 30 kHz 17 kHz 0.55 Vp-p 1.1 Vp-p 1.15 Vp-p MHz MHz Sound FM demodulation block (RX) Parameter Sound demodulation level S/N Symbol VOUT1 VOUT2 SN1 SN2 Conditions Input signal: CAR=4.5MHz, DEV=±25kHz, MOD=1kHz, Level: 100mVp-...
FIG. 5 is a block diagram showing the structure of a conventional typical FM demodulation circuit for demodulating the wide-band FM modulated signal. FIG. 6 is a diagram used to explain how the amplitude variation component and average-value variation component in the wide-band FM modulated ...