Title :
Demodulation of D2PSK with a DPSK detector and improved error performance in AWGN
Author :
Qu, Shouxing ; Jiang, Yuan
Author_Institution :
Cadence Design Syst. Inc., Ottawa, Ont., Canada
Abstract :
Proposed in this paper is a new demodulation scheme for a double differential PSK (D2PSK) signal. It consists of a first-order differential detector (i.e. a conventional DPSK detector) with an adaptive decision-feedback rotation part followed by a differential decoder. A decision is made on the first-order phase difference (FOPD) rather than the second-order phase difference (SOPD), and the information-carrying SOPD is recovered by differentially decoding of the decided FOPDs. As a result the effect of the AWGN is significantly reduced; hence the error performance improves. Analysis shows that the symbol error rate of D2PSK with such a receiver is approximately twice as high as that of DPSK, which has been verified by the simulation for quaternary (M=4) D2PSK
Keywords :
AWGN channels; adaptive signal detection; decoding; demodulation; differential phase shift keying; error statistics; receivers; AWGN; D2PSK; DPSK detector; adaptive decision-feedback rotation; demodulation; differential decoder; double differential PSK; error performance; first-order differential detector; first-order phase difference; information-carrying SOPD; receiver; second-order phase difference; symbol error rate; AWGN channels; Decoding; Degradation; Demodulation; Detectors; Differential quadrature phase shift keying; Error analysis; Frequency; Phase detection; Phase shift keying;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.886311
