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What is Passband ripple?
The ideal passband of a receiver should have steep sides and a flat top. However many receivers use stacked filters to create the passband, and consequently the top of the passband sometimes has a ripple on it. This can cause distortion of the received signal.
What are the disadvantages of passive filters?
» There is no isolation b/w input and output. » These circuits can not provide any gain. » There is always someloss of signal, It can be in the passband. » Circuit becomes bulky if inductors are used. » There is no clear demarcation between Passband and stopband but actually it (Passband & Stopband) get mixed up. » In this frequency response is not sharp as no sudden change in the output when switching from passband to stopband. » Source loading can take place.
Will light pass through two successive colour filters?
Yes, if the passband of the first filter includes that of the second one, and the light contains wavelengths that fall within their common passband.
What is near effect?
Adjacent channel interference nearby frequency leak into passband. The problem can be worse if an adjacent channel user is transmitting in very close range to a subscriber receiver. This problem is referred as near far affect. By Kazi Ashique Ahmed Rafi it usaully occurs in CDMA when users are transmitting unequal powers. by salman ahmed
Name different types of filter circuits.?
band passband rejectlow passhigh passcombetc.RCRLLCRLCetc.
What is near-far effect?
Adjacent channel interference nearby frequency leak into passband. The problem can be worse if an adjacent channel user is transmitting in very close range to a subscriber receiver. This problem is referred as near far affect. By Kazi Ashique Ahmed Rafi it usaully occurs in CDMA when users are transmitting unequal powers. by salman ahmed
How do you convert the passband frequency into baseband frequency the range of 2Ghz passband?
Use the shifting property of the Fourier transform to shift the frequency response down to baseband. Multiply the time-domain signal by a complex exponential with the frequency of the amount you want to shift the frequency response.
What are commonly used communication channels?
Digital (discrete) or analog (continuous) channelBaseband and passband channelTransmission medium, for example a fibre channelMultiplexed channelComputer network virtual channelSimplex communication, duplex communication or half duplex communication channelReturn channelUplink or downlink (upstream or downstream channel)Broadcast channel, unicast channel or multicast channel
What type of filter attenuates all frequencies above and below a specified passband?
Band-Pass filters
What is base band frequency?
Baseband frequency refers to the range of frequencies over which a signal is transmitted without modulation. In communication systems, baseband signals typically occupy the frequency range from 0 Hz to the upper limit of the signal bandwidth. This is in contrast to passband signals, which are modulated onto carrier frequencies for transmission over a channel.
Advantages and disadvantages of butterworth filter?
Advantage is that it has the most flat passband meaning that it is very good at simulating the passband of an ideal filter. The disadvantage is that it has a horrible stopband because it gradually goes to zero so some parts of the stopband are still passed. However, for an nth-order Butterworth Filter, as n increases, the closer it is to an ideal filter. However, it is highly impractical to build a ridiculously high order Butterworth filter.
What has the author Harold Lee Broberg written?
Harold Lee Broberg has written: 'A three-pole analog cancellation filter with variable passband for use in range-gated radars'
