What is BPSK modulation?
Binary phase-shift keying (BPSK), also known as bi-phase modulation, is a simple, popular digital modulation scheme. The symbol constellations are as far apart as possible, which is desirable for weak signal work. Thus BPSK finds applications in weak signal communications, spread-spectrum, ranging and radar systems.
How do you generate a modulation signal in Matlab?
y = modulate( x , fc , fs ) modulates the real message signal x with a carrier frequency fc and sample rate fs . If x is a matrix, the modulated signal is computed independently for each column and stored in the corresponding column of y . [ y , t ] = modulate( x , fc , fs ) also returns the internal time vector t .
How do you modulate BPSK?
The modulation of BPSK is done using a balance modulator, which multiplies the two signals applied at the input. For a zero binary input, the phase will be 0° and for a high input, the phase reversal is of 180°. Following is the diagrammatic representation of BPSK Modulated output wave along with its given input.
What is Fmdemod Matlab?
z = fmdemod( y , Fc , Fs , freqdev ) returns a demodulated signal z , given the input frequency modulated (FM) signal y , where the carrier signal has frequency Fc and sampling rate Fs . freqdev is the frequency deviation of the modulated signal.
What is Ammod Matlab?
y = ammod( x , Fc , Fs ) returns an amplitude modulated (AM) signal y , given the input message signal x , where the carrier signal has frequency Fc . The modulated signal has zero initial phase and zero carrier amplitude, so the result is suppressed-carrier modulation. Note. The value of Fs must satisfy Fs ≥ 2 Fc .
What is bandwidth requirement of BPSK?
The maximum bandwidth efficiency (R_b/W) of BPSK is 1 b/s/Hz, while the maximum bandwidth efficiency of QPSK is 2 b/s/Hz. Now if you want to transmit data of rate 10 Mbps you will need 10 Mhz for BPSK and 5 MHz for the QPSK.
What is phase shift modulation?
Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave). The modulation is accomplished by varying the sine and cosine inputs at a precise time.
What is frequency shift keying (FSK)?
What is Frequency Shift Keying? Frequency Shift Keying Theory. This frequency shift keying theory shows how the frequency characteristics of a binary signal changed according to the carrier signal. Coherent FSK Detection. In this synchronous FSK detection, the modulated wave got affected by noise while reaching the receiver. Non-coherent FSK Detection. Advantages. Disadvantages.