Skip to main content

Signal Processing- An Introduction


Signal Processing is a field of applied mathematics and Engineering, it deals in analysing signals in both discreet and continuous time. Whereas Digital Signal Processing is concerned with analyzing discrete time signals by a sequence of numbers or symbols. The DSP aims at measuring, filtering and compressing the analog signals.

The signal processing is divided under various sub heads, such as:

Analog Signal Processing: It is for signals that have not been digitized , it involves both linear electronic circuits and non linear circuits.

Discrete Time Signal Processing: It is for sampled signals that are considered definite at discrete time intervals, and can only be quantized in time and not magnitude.

Digital Signal Processing: It involves processing of digitized discrete time signals. A continuously changing wave form is converted into a series of different levels.

Converting Analog Signals into Digital Signals

Analog to Digital Converter
The device used for converting Analog to Digital signals is called Analog to Digital Converter (ADC). The simplest ADC uses resistance ladder to switch in the appropriate number of resistors in series to create the desired voltage that is compared to the input voltage. The output of the resistance ladder is compared to the analog voltage in a comparator when there is a match, the digital equivalent is captured.

An important application of Analog to Digital conversion is Binary search, which depends upon:
  • The clock speed of ADC
  • The BIT Resolution


Typical DSP operations include:
  • Filtering
  • Energy of Signals
  • Frequency Transformation


Currently DSP is used in a wide variety of everyday application like:
  • Speech Coding
  • Image/Video Synthesis
  • Adaptive Filtering
  • Image Analysis
  • RADAR/SONAR
  • Data Transmission and Reception     


Digital Signal processing is usually implemented with the help of microprocessors, which process the data using fixed point arithmetic. Nowadays a growing number of DSP applications are being implemented on Embedded systems using powerful PCs with multi core processors.


Labels:

Comments

Post a Comment

Popular posts from this blog

Multi-platform development for iPhone and Android is the future

Mobile Application Development has gone Multi-platform, with Apple iPhone and Google Android , Blackberry , Window Phone   the top preferences by developers, according to a Forrester Research report released late in 2010. To avoid being overwhelmed by Multi-platform complexity, Forrester recommends developers establish a multidevice strategy for both development and testing in 2011. Single device support is giving way to multidevice accommodation, Forrester said. Multiple majority Multidevice shops are now in the majority, with one in four IT shops supporting all types of personal mobile devices employees bring to work. Some employers let employees choose from a list of approved devices and OSes. "The year 2010 was when mobile application development began crossing the chasm from early adopters to mainstream application development shops," said analyst Jeffrey Hammond in the report's executive summary, along with associates Mike Gilpin and Adam Knoll. "But what
Post a Comment
Read more

eBay Bargain Is Latest MoD Data Leak

The data on the drive was easily retrieved and had handily-labelled folders. One marked ‘Nato Secret’ held information and photographs of police command posts in Helmand and notes about the police manning the area. These included the number of men, their weapons and patrol details. The files also held pictures and personal information about “hundreds” of volunteers who had joined the Afghan police force and army. There was also a copy of the “Afghan National Police Tactical Handbook” which showed how the police would tackle the Taliban rebels and gave details on how to recognise a roadside bomb. All of the data was unencrypted and freely accessible. Had it fallen into the hands of the Taliban, the information could have put Afghan lives in greater danger and compromised the British presence in the country. Sugden, a graduate of Sandhurst, served with the Coldstream Guards as an anti-tank platoon commander in Afghanistan and has since just completed a year as the Queen’s equerry, o
Post a Comment
Read more

Logic-Immo : prix Orange lors des AppAwards du mobile 2.0

Le Mobile 2.0, un événement regroupant les acteurs importants de l’internet mobile Français pour une série de conférences, s’est tenu la semaine dernière à Paris. Les App Awards est un concours destiné à récompenser les meilleures applications . Cette année le gagnant du 1er prix Orange n’est autre que Logic-Immo, qui a été salué pour la stratégie multi-supports de son application mobile, destinée à l’immobilier. En savoir plus sur : www.immobilier2.0-le-blog.com Posté par Thao
Post a Comment
Read more