Need for modulation recognition - software defined radio, Electrical Engineering

Need for Modulation Recognition

There are so many communication signals all available with different types of modulation and different frequencies. It is necessary to identify and closely monitor these signals for few applications. Surveillance and military operations require classification of modulation whether analog or digital modulation technique because it is necessary to know the type of incoming signal. How to observe and identify modulated signals is necessary to know about valuable information. The recognizers help to distinguish the signal in presence of (AWGN) along with presence of other signals. The process of recognition is the first step in demodulating the original signal.

Modulation recognition starts with modulation feature extraction to obtain unique information related to amplitude, phase, and frequency. Then, feature recognition is applied by using logic analysis to match features to known templates, or using statistical analysis to find a solution based on probabilities.  The automatic recognition of the modulation format of a detected signal is a major task of an intelligent receiver, with various civilian and military applications. Without any knowledge about incoming signal and its parameters, blind identification of modulation technique is difficult. Proper demodulation of the incoming signal takes place with the help of automatic modulation recognition without knowing the modulation scheme beforehand. Automatic modulation recognition is an emerging topic for software-defined radios. 

Furthermore, blind recognition of the modulation format of the received signal is an important problem in software defined radio (SDR). The Software Defined Radio (SDR) is widely used in military and commercial communication applications. Meanwhile, the requirement of identifying the modulation format of the incoming signal is necessary for designing intelligent wireless systems that can be used in different applications.

 

Posted Date: 3/30/2013 6:59:32 AM | Location : United States







Related Discussions:- Need for modulation recognition - software defined radio, Assignment Help, Ask Question on Need for modulation recognition - software defined radio, Get Answer, Expert's Help, Need for modulation recognition - software defined radio Discussions

Write discussion on Need for modulation recognition - software defined radio
Your posts are moderated
Related Questions

1.    A 230/1000V 50 Hz, single phase transformer has the following test data: Open circuit test (L.V.) Primary voltage = 230V Primary current = 1.30 A Input power

Q. The response y(t) of a linear system to an excitation x(t) = e -2t u(t) is y(t) = (t + 2)e -t u(t). Find the transfer function.


PlZ Explain broooooo ..? What is Miller circuit and bootstrap I have xm tomrow and I am not getting answers soo plz.

Q. For a 10-bit R-2R ladder-network D/A converter with an MSB resistor value of 10 k, what is the value of the LSB resistor?


If a current of 20A flows for five minutes, find the quantity of electricity transferred. Quantity of electricity,   Q = It = 20 x 5 x 60 = 6000C     

Q. What is right-through routing? In right-through routing, originating exchange determines complete route from source to destination. No routing decisions are taken at interme

Explain effect of frequency of applied electric field. If an external electric field is applied, the distance among charges that is related to chemical bonding keeps constant i