FSK SIGNAL DEMODULATORPROBLEM TO BE SOLVED: To surely demodulate a base band signal even when noise is in existence for a non-signal period where a communication line is not driven by an FSK(frequency shift keying) signal.TSUBOTA KAZUHIRO坪田 一広TAKANO TOSHIYUKI...
除具有两个符号的二进制频移键控之外,尚有代表多个符号的多进制频移键控,简称多频调制。一种用多个载波频率承载数字信息的调制类型。最常见的是用两个频率承载二进制1和0的双频FSK系统。 FSK (频移键控) ,也称为移频调制和移频信号。 Frequency Shift Keying is a data signal converted into a specific fre...
On the other hand, a detecting circuit 306 detects the FSK signal at the terminal 301, the output signal level is decided by a decision circuit 307 and the output voltage of the comparator 303 is outputted to an output terminal 302 based on the result of the circuit 307. 展开 ...
PURPOSE:To constitute the FSK signal decoder to decode a binary data from an FSK signal with a delay detector without using a complicated synchronization deterctor or the like and to prevent the restriction of the relation between a carrier frequency and a symbol interval. CONSTITUTION:An input ...
%2FSK signal x=randint(1,M); m1=sin(2*pi*fc*t); %载频信号1 m2=sin(2*pi*2*fc*t); %载频信号2 y=zeros(1,M*N); for i=1:M if x(i)==1; for j=1:N; y((i-1)*N+j)=x(i)*m1(j); %码元信息为1时,为m1频率波形 ...
title('Received FSK signal');gridon subplot(414) plot(tb, pskn(1:10*30),'k','linewidth',1.5) title('Received PSK signal');gridon figure(3) semilogy(0:20,BER_A,'b','linewidth',2) title('BER Vs SNR') gridon; holdon
signal signal_u( .i_clk (i_clk), .i_rst (~i_rst), .o_bits(o_msg) ); //设置SNR wire signed[7:0]o_SNR; vio_0 your_instance_name ( .clk(i_clk), // input wire clk .probe_out0(o_SNR) // output wire [7 : 0] probe_out0 ...
PURPOSE:To miniaturize an FSK signal decoder, to realize non-adjustment, and to attain inexpensive constitution by providing an edge detecting means, plural shift registers, an AND gate, and an OR gate. CONSTITUTION:The edge detecting means 1 outputs a pulse synchronized with the timing of an ...
CONSTITUTION:A reception FSK signal is inputted to a gate 21 of a DPLL circuit 6 via a reception filter and a limiter (not shown) and to a differentiation circuit 29 detecting a signal conversion point. A selection circuit 24 outputs a frequency f1 or g1 to an M-notation counter 25 in...
g)*Ts;%三角波信号乘上频偏的角频率，与载波信号相位相加，即可得信号相位signal=cos(2*pi*f0*t+...