Title :
Equalized GMSK, equalized QPSK and OFDM, a comparative study for high-speed wireless indoor data communications
Author :
Hanli Zou ; Hea Joung Kim ; Daneshrad, B. ; Wesel, Richard ; Magione-Smith, W.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
The proper choice of modulation and detection schemes to enable high-speed wireless indoor data communications has been the subject of extensive study. Of particular interest to ASIC designers is the complexity, cost and power dissipation of the analog and digital processing elements associated with such systems. This paper presents a side-by-side comparison of the three most popular system architectures for high-speed wireless data communications, namely equalized QPSK, equalized GMSK and OFDM. Their performance and minimum configuration at data rates up to 30 Mbps is measured and analyzed under a set of simulated indoor wireless channels with ensemble-average RMS delay spread τRMS of 35 ns. The achievable channel capacity is proposed as a metric as well as outage and spectral efficiency. Finally, a single figure of merit is used to compare the three systems
Keywords :
OFDM modulation; application specific integrated circuits; channel capacity; data communication; decision feedback equalisers; delays; indoor radio; minimum shift keying; quadrature phase shift keying; wireless LAN; 30 Mbit/s; 35 ns; ASIC; DFE; OFDM; achievable channel capacity; analog processing elements; complexity; cost; data rates; detection schemes; digital processing elements; ensemble-average RMS delay spread; equalized GMSK; equalized QPSK; figure of merit; high-speed wireless indoor data communications; minimum configuration; modulation; outage; performance; power dissipation; simulated indoor wireless channels; spectral efficiency; system architectures; wireless LAN; Analytical models; Application specific integrated circuits; Costs; Data communication; Delay; OFDM modulation; Performance analysis; Power dissipation; Quadrature phase shift keying; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.780519
