Title :
Low-Complexity OFDM System with High Mobility Using DAPSK Schemes
Author :
Toender, Nico ; Georgi, Sebastian ; Rohling, Hermann
Author_Institution :
Hamburg Univ. of Technol.
Abstract :
This paper considers orthogonal frequency division multiplexing (OFDM) systems with coherent and incoherent demodulation techniques in mobile radio channels with high terminal velocities. Coherent demodulated systems, using a scattered pilot based channel estimation or a decision directed channel estimation approach, is compared in terms of bit error rate (BER) performance and hardware complexity with an incoherent system with differential amplitude and phase shift keying (DAPSK) modulation schemes. It will be shown, that in high mobility scenarios, differential modulation schemes together with incoherent demodulation leads to an useful trade off between performance and hardware consumption. The hardware complexity results are acquired from field programmable gate array (FPGA) implementations
Keywords :
OFDM modulation; amplitude shift keying; channel estimation; differential phase shift keying; error statistics; field programmable gate arrays; mobile radio; BER performance; FPGA; OFDM system; bit error rate; decision directed channel estimation approach; differential amplitude and phase shift keying; field programmable gate array; hardware complexity; mobile radio channels; orthogonal frequency division multiplexing; Bit error rate; Channel estimation; Demodulation; Field programmable gate arrays; Hardware; Land mobile radio; OFDM; Phase modulation; Phase shift keying; Scattering; DAPSK Schemes; FPGA Prototyping; Hardware Complexity; OFDM;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.254279
