Results 111 to 120 of about 2,215 (138)
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A COFDM-based radio for HDR LOS networked communications
1999 IEEE International Conference on Communications (Cat. No. 99CH36311), 2003A coded orthogonal frequency division multiplexed (COFDM) radio has been developed for high data rate (HDR) line-of-sight (LOS) communications in a mobile wireless network. COFDM has been chosen over more traditional single carrier adaptive equalization modulation techniques due to its better bandwidth efficiency and to its increased robustness to ...
Paul H. Moose +3 more
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Soft Detection and Decoding of Clipped and Filtered COFDM Signals
2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007Clipping and filtering is an attractive method for the reduction of the PAPR of OFDM signals before transmission. However, the resulting distortion noise impacts the error rate performance. An iterative receive algorithm employing soft modulation and soft input-soft output (SISO) decoding is presented, and its coded frame error rate (FER) performance ...
Peter Zillmann +2 more
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Adaptive predistortion of COFDM signals for a mobile satellite channel
International Journal of Communication Systems, 2003AbstractIn this paper, we consider the optimization of the performance of QPSK and 16‐QAM coded orthogonal frequency division multiplexing (COFDM) signals over the non‐linear and mobile satellite channel. A high power amplifier and Rician flat fading channel produces non‐linear and linear distortions; an adaptive predistortion technique combined with ...
Nibaldo Rodríguez +2 more
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Decimal Frequency Offset Estimation in COFDM Wireless Communications
IEEE Transactions on Broadcasting, 2004Timing jitter, frequency offset, carrier phase jitter and sampling clock frequency offset are the main synchronization errors encountered by OFDM systems. As many literature studies have proved, OFDM systems are very sensitive to frequency errors. In this paper, an improved method for decimal frequency offset estimation in time domain is proposed.
Bo Ai 0001 +4 more
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COFDM modem for terrestrial radio broadcasting
8th International Conference on High-Frequency Radio Systems and Techniques, 2000This paper presented a complete system proposal for terrestrial audio broadcasting that shows the current state of the art in COFDM modem technology. COFDM was chosen because of its very good compromise between extreme robustness and a high spectral efficiency, and its ability to allow for a very versatile system accommodating various bandwidths ...
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Performance of multi-carrier CDM and COFDM in fading channels
Seamless Interconnection for Universal Services. Global Telecommunications Conference. GLOBECOM'99. (Cat. No.99CH37042), 2003Coded orthogonal frequency division multiplexing (COFDM) is a powerful technique for high rate data transmission over fading channels. COFDM has been chosen for the audio and video broadcasting standards in Europe. In this paper, multi-carrier code division multiplexing (MC-CDM) is presented and investigated as alternative to COFDM for high rate data ...
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2007 17th International Crimean Conference - Microwave & Telecommunication Technology, 2007
A. V. Britkov +6 more
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A. V. Britkov +6 more
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