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It is usually expressed in decibels (dB).
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In a spread-spectrum system, the process gain (or “processing gain”) is the ratio of the spread (or RF) bandwidth to the unspread (or baseband) bandwidth.
Ask fsk psk code#
Which filter is used to get the final FHSS signal?īand pass filter What is processing gain MCQS?Įxplanation: Processing gain is given as both as the ratio of the minimum bandwidth of the data to data rate and also the by the ratio of code chip rate and data rate as minimum bandwidth is approximately equal to code chip rate. Which has lower noise immunity? Explanation: TDM has lower noise immunity. Which is better for avoiding jamming?Įxplanation: Frequency hopping spread spectrum is better for avoiding jamming. Out of the following values, which one is not possible in probability? Explanation: In probability P(x) is always greater than or equal to zero. Which one is not possible in probability?ġ1. However, in order to achieve the same bit-error probability as BPSK, QPSK uses twice the power (since two bits are transmitted simultaneously). Which has same probability of error BPSK?īPSK is similar to bipolar PAM and both have same probability of error. Which has same probability of error? Explanation: BPSK is similar to bipolar PAM and both have same probability of error. In OOK one of the bit values is represented by no voltage. A popular ASK technique is called on-off-keying (OOK). Noise usually affects the amplitude therefore, ASK is the encoding method most affected by noise. Unfortunately, ASK transmission is highly susceptible to noise interference. Between the first time interval of input binary signal multiplied with the first time interval of carrier signal voltage and the same process continues for all time intervals. In ASK, the input binary signal is multiplied with the carrier signal along with its time intervals. What are the three main types of shift keying?Īs with analog modulation, there are three parameters of the carrier wave to vary and therefore three basic types of shift keying: They are at times are extremely sensitive to phase differences.Extremely difficult algorithms are used in decoding the binary information which is transmitted during PSK.It is a type of non-coherent reference signal.It has a very less bandwidth as compared to ASK.Some of the major disadvantages of PSK are: What are the advantages and disadvantages of PSK? Nonlinear effects for WDM transmission.
Ask fsk psk Bluetooth#
This method is broadly used for bio-metric, wireless LAN along with wireless communications like Bluetooth and RFID.The applications of PSK include the following. 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). but it cannot be said that it fades less as over long distance communication its SNR decreases and hence quality of signals … Which modulation technique is most affected by noise? Yes, FSK is better than ASK in the cases that the carrier has a constant amplitude and hence are used in the communication systems wher security reasons are considered …. Hence peak power requirement is more in ASK, where it is reduces in PSK. Why is PSK always preferable over ASK in coherent detection? ASK is on-off signaling where as the modulated carrier is continuously transmitted in PSK. What data are continuous and take continuous values?.What is the major weakness of synchronous TDM?.Which filter is used to get the final FHSS signal?.Which one is not possible in probability?.Which has same probability of error BPSK?.What are the three main types of shift keying?.What are the advantages and disadvantages of PSK?.Which modulation is the most efficient one?.What is the probability of error for ask?.Which modulation technique is most affected by noise?.