Essays about: "qam"

Showing result 16 - 20 of 36 essays containing the word qam.

1. 16. MIMO Channel Equalization and Symbol Detection using Multilayer Neural Network

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Athar Waseem; A.H.M Sadath Hossain; [2013]
   Keywords : MIMO; ISI; NN; SER; Channel Equalizer; QAM;

   Abstract : In recent years Multiple Input Multiple Output (MIMO) systems have been employed in wireless communication systems to reach the goals of high data rate. A MIMO use multiple antennas at both transmitting and receiving ends. These antennas communicate with each other on the same frequency band and help in linearly increasing the channel capacity. READ MORE

3. 17. Performance evaluation of higher order modulations in OFDM systems

   University essay from Institutionen för fysik och elektroteknik (IFE)

   Author : Veerapu Sravankumar; Malineni Jayaram Navaneeth; Chandran Vivek; [2013]
   Keywords : ;

   Abstract : In this thesis we design and simulate OFDM (Orthogonal Frequency Division Multiplexing) to study the performance of the OFDM system at higher order modulation schemes. It is very important to evaluate performance of the communication system, to test the efficiency and quality of the service it can provide. READ MORE

4. 18. Extraction of radio frequency quality metric from digital video broadcast streams by cable using software defined radio

   University essay from Kommunikationssystem; Tekniska högskolan

   Author : Viktor Eriksson; [2013]
   Keywords : QAM; DVB-C; MER; BER; Gardner; Phase locked loop; Mueller Muller; RRC-filter; Carrier recovery; Timing Recovery; Matched filtering;

   Abstract : The purpose of this master thesis was to investigate how effiecient the extractionof radiofrequency quality metrics from digital video broadcast (DVB) streamscan become using software defined radio. Software defined radio (SDR) is a fairlynew technology that offers you the possibility of very flexible receivers and transmitters where it is possible to upgrade the modulation and demodulation overtime. READ MORE

5. 19. PERFORMANCE ENHANCEMENT OF OFDM IN PAPR REDUCTION USING NEW COMPANDING TRANSFORM AND ADAPTIVE AC EXTENSION ALGORITHM FOR NEXT GENERATION NETWORKSPERFORMANCE ENHANCEMENT OF OFDM IN PAPR REDUCTION USING NEW COMPANDING TRANSFORM AND ADAPTIVE AC EXTENSION ALGORITHM FOR NEXT GENERATION NETWORKS

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : CLEMENT RANJITH ANTHIKKAD & IRFAN AHMED BAIG; [2013]
   Keywords : Orthogonal Frequency Division Multiplexing OFDM ; Peak-to-Average Power Ratio PAPR ; Complementary Cumulative Distribution Function CCDF ; Partial Transmit Sequence PTS ; Tone Reservation TR .;

   Abstract : This paper presents a new hybrid PAPR reduction technique for the OFDM signal, which combines a multiple symbol representations method with a signal clipping method. The clipping method is a nonlinear PAPR reduction scheme, where the amplitude of the signal is limited to a given threshold. READ MORE

6. 20. QAM and PSK Modulation Schemes under Impulsive Noise

   University essay from Avdelningen för elektronik, matematik och naturvetenskap

   Author : Ezequiel Pérez Rodenas; [2012]
   Keywords : Impulsive noise; QAM; PSK; modulation; BER; APD;

   Abstract :    Nowadays most of the communications systems are designed considering only to work under AWGN (Additive White Gaussian Noise). But the implementation of wireless systems in industrial facilities brings different kind of interference from machines or any other kind of electronic devices. READ MORE