Title :
Performance of OQPSK in indoor environment
Author_Institution :
TDF-C2R, Metz, France
Abstract :
The paper evaluates the performance of a transmission system with OQPSK (offset quadrature phase shift keying) modulation and an adaptive decision feedback equalizer (DFE) in an indoor environment. A model of the slowly time-varying indoor radio channel is used to assess how much a DFE improves the bit error rate of coherently demodulated OQPSK. The author shows that the use of DFEs of relatively modest complexity enables the transmission of bit rates of 8 or 20 Mbps. Perfect decision feedback is initially assumed. The author then shows that the loss in performance due to the use of a decision directed equalizer is approximately 2 dB. the author finally evaluates the resistance of the transmission system to co-channel interference
Keywords :
adaptive equalisers; cellular radio; cochannel interference; computational complexity; decision feedback equalisers; error statistics; indoor radio; land mobile radio; quadrature phase shift keying; radiofrequency interference; time-varying channels; 2 dB; 20 Mbit/s; 8 Mbit/s; OQPSK; adaptive decision feedback equalizer; bit error rate; cochannel interference; coherently demodulated OQPSK; complexity; decision directed equalizer; indoor environment; loss in performance; offset quadrature phase shift keying modulation; slowly time-varying indoor radio channel; transmission system; Adaptive equalizers; Decision feedback equalizers; Delay effects; Filtering; Filters; Frequency; Indoor environments; Indoor radio communication; Intersymbol interference; Receivers;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345289
