History of Radio in Bangladesh_ Bangladesh Betar (Bengali: বাংলাদেশ বেতার) or BB is the state-owned radio broadcasting organisation of Bangladesh. It was also known as Radio Bangladesh between 1975 and 1996. Radio transmission in the region now forming Bangladesh started in Dhaka on December 16‚ 1939. Initially‚ the station was located in old Dhaka. Later‚ the station was relocated to Shahbag. It played an important role during the Bangladesh Liberation War of 1971. On March 26‚ 1971‚ the broadcasting
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US ARMY SIGNAL CENTER AND FORT GORDON PRINCIPLES OF RADIO WAVE PROPAGATION (SC:25C) EDITION DATE: FEBRUARY 2005 PRINCIPLES OF RADIO WAVE PROPAGATION Subcourse Number SS0130 EDITION B United States Army Signal Center and Fort Gordon Fort Gordon‚ Georgia 30905-5000 10 Credit Hours Edition Date: February 2005 SUBCOURSE OVERVIEW This subcourse is designed to teach the principles of radio wave propagation. The prerequisite for this subcourse is that
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Defined Radios A. History B. Definition C. Basic Components II. Operating Principles of SDRs A. Ideal concept B. SDR Receiver Architecture a) Superheterodyne Receiver b) Digital Down Conversion C. SDR Transmitter Architecture a) Digital Up Conversion III. Common SDR Implementations IV. SDR Software V. Advantages and Trade-Offs in using SDRs A. Performance Parameters VI. Current Usage VII. SDRs of the Future References: l Software-defined radio‚ Wikipedia‚ the free encyclopedia
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Radio waves for Communication Radio waves are electromagnetic waves with wavelengths larger than the infrared light. Like all other electromagnetic waves‚ they travel at the speed of light. The wavelengths can vary from the size of a football field to the size of a football. They can be produced naturally by large stars and by lightning. Man-made radio waves are used for transmitting signals and currents. Specific Properties of Radio Frequency (RF) Current Radio frequency is the frequency of radio
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In Britain‚ radio broadcasting was dominated entirely by the BBC‚ which since the early 1920s had been developing a broad spectrum of programming including different genres of music and speech‚ including documentaries‚ drama‚ comedy‚ news‚ religious broadcasts‚ children’s programmes‚ schools broadcasts and sports coverage). BBC output was a unifying force within British culture‚ and has been written about extensively elsewhere. In the 1950s‚ a small but growing cohort of Rock and pop music fans
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47 Cellular radio systems PART 1 (47.1 – 47.3.5) 47.1 Introduction Cellular radio systems are by far the most common of all public mobile telephone networks‚ the earlier (pre-cellular) networks now all being in decline. The basic principles of cellular systems were established by Bell Laboratories in 1949‚ but it was not until the early 1980s that technology allowed real commercial networks to be built and service offered to the public. Systems were developed at different times
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Great Depression. But for radio it was the Golden Age. The radio was a great diversion from the terrible economy. Not only was radio a great source of entertainment‚ but it also provided relief from the depression and connected the home front with the war. There were many different “shows” broadcasted on the radio‚ there was a vast category of genres‚ such as drama (soap operas)‚ action/adventure‚ and comedies. It wasn’t just entertainment‚ it was also educational. The radio was a great way to unite
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Radio Frequency Identification Device (RFID) Introduction Businesses‚ today‚ are researching ways to improve their daily processes‚ both logically and physically. This may include better reporting of profit and loss‚ return on investment using a low cost technological solution. Radio Frequency Identification Device (RFID) is one technology that many companies are considering implementing. Description of Radio Frequency Identification Device (RFID) Department of
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Radio‚ Film analysis The dramatic and uplifting movie “Radio” starring Cuba Gooding JR. and Ed Harris‚ is based on the true life story of James Robert Kennedy‚ a k a Radio; a mentally retarded young African-American who spends his days pushing a shopping cart around the streets of Anderson‚ a small South Carolina town‚ collecting junk and old radios. The movie starts with the heartbreaking scene of Radio pushing his cart around the town‚ in his own little world; people are ignoring him‚ and a
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In the mid-1960’s British teenagers had little to listen to on the radio; the UK government felt radio was such a powerful mass communication medium that it should be placed under state control (2)‚ so the British Broadcasting Corporation (BBC) was formed and was the only radio allowed to be broadcast. BBC radio would air very little pop music due to so-called ‘needletime restrictions’‚ which were put in place to ease fears that if recorded music became popular then live music would disappear (1)
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