Title :
A Pragmatic Design of Frequency-Domain Equalizers for Offset Modulations
Author :
Luzio, Miguel ; Dinis, Rui ; Montezuma, Paulo
Abstract :
Offset modulations such as OQPSK (Off- set Quaternary Phase Shift Keying) and OQAM (Offset Quadrature Amplitude Modulation), combined with SC- FDE (Single-Carrier with Frequency-Domain Equalization) are an interesting choice for broadband wireless systems, that require low-complexity transmitters and efficient power amplification. However, the FDE perfor- mance can be rather poor due to interference between the in-phase and quadrature components at the sampling instants, especially when large constellations are employed. In this paper we propose pragmatic iterative and non- iterative FDE designs for offset modulations. Our performance results show that both iterative and non-iterative pragmatic FDE receivers have excellent performance, even for large OQAM constellations.
Keywords :
broadband networks; equalisers; frequency-domain analysis; iterative methods; phase shift keying; quadrature amplitude modulation; radio receivers; radio transmitters; FDE performance; SC-FDE; broadband wireless systems; frequency-domain equalizers; iterative pragmatic FDE receivers; large OQAM constellations; low-complexity transmitters; noniterative FDE designs; noniterative pragmatic FDE receivers; offset modulations; power amplification; pragmatic iterative designs; quadrature components; sampling instants; single-carrier with frequency-domain equalization; Bit error rate; Frequency domain analysis; Interference; Minimization; Modulation; Pragmatics; Receivers;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
DOI :
10.1109/VTCFall.2012.6398933