FSK:频移键控是利用两个不同频率f1和f2的振荡源来代表信号1和0,用数字信号的1和0去控制两个独立的振荡源交替输出。对二进制的频移键控调制方式,其有效带宽为B=2xF+2Fb,xF是二进制基带信号的带宽也是FSK信号的最大频偏,由于数字信号的带宽即Fb值大,所以二进制频移键控的信号带宽B较大,频带利用率小。 2-...
The modulated output of a direct digital synthesizer (DDS) can switch frequency and/or phase in a phase-continuous or phase-coherent manner, as shown in Figure 1, and as described in “Multichannel DDS Enables Phase-Coherent FSK Modulation,” making DDS technology well suited for both FSK and...
plot(tb, fsk(1:10*30),'r','linewidth',1.5) title('FSK Modulation');grid on subplot(414) plot(tb, psk(1:10*30),'k','linewidth',1.5) title('PSK Modulation');grid on xlabel('Time');ylabel('Amplitude') %AWGN for snr=0:20 askn=awgn(ask,snr); pskn=awgn(psk,snr); fskn=awg...
plot(tb, fsk(1:10*30),'r','linewidth',1.5) title('FSK Modulation');grid on subplot(414) plot(tb, psk(1:10*30),'k','linewidth',1.5) title('PSK Modulation');grid on xlabel('Time');ylabel('Amplitude') %AWGN for snr=0:20 askn=awgn(ask,snr); pskn=awgn(psk,snr); fskn=awg...
('FSK Modulation');grid on subplot(414) plot(tb, psk(1:10*30),'k','linewidth',1.5) title('PSK Modulation');grid on xlabel('Time');ylabel('Amplitude') %AWGN for snr=0:20 askn=awgn(ask,snr); pskn=awgn(psk,snr); fskn=awgn(fsk,snr); ... %BER errA=0;errF=0; errP=0; ...
title('ASK Modulation');grid on subplot(413) plot(tb, fsk(1:10*30),'r','linewidth',1.5) title('FSK Modulation');grid on subplot(414) plot(tb, psk(1:10*30),'k','linewidth',1.5) title('PSK Modulation');grid on xlabel('Time');ylabel('Amplitude') ...
utilizes the controller to send data and commands to the transponder by an FSK modulated RF signal in order to cause the transponder to either read selected data from, or write selected data to, the non-volatile memory and transmit the same back to the controller utilizing PSK RF modulation....
Simulink实现ASK FSK PSK数字信号调制与解调仿真Sa**ss 上传809.73 KB 文件格式 zip FSK simulink 解调 ASK simulink仿真 ask调制解调 fsk解调 SIMULINK simulink ask 说明: 基于Simulink实现的ASK,FSK,PSK,调制解调(ASK, FSK, PSK, modulation and demodulation based on Simulink implementation) ...
%MODULATION ask=[];psk=[];fsk=[]; for i=1:n if b(i)==1 ask=[ask sa1]; psk=[psk sp1]; fsk=[fsk sf1]; else ask=[ask sa0]; psk=[psk sp0]; fsk=[fsk sf0]; end end figure(1) subplot(411) stairs(0:10,[b(1:10) b(10)],'linewidth',1.5) ...
(CW), frequency shift keying (FSK) and frequency modulation (FM)but requires SNR ≥ 20dB for correct modulation scheme recognition. A pattern recognition approach for both digital and analogue recognition was proposed by Jondral [5],which can classify AM, ASK2, SSB, PSK2, FSK2 and[translate...