Title :
A 4-channel diversity QAM receiver for broadband wireless communications
Author :
Pulnam, J.S. ; Samueli, H.
Author_Institution :
California Univ., Los Angeles, CA, USA
Abstract :
Robust wireless communication at tens of Mb/s in a limited bandwidth requires sophisticated techniques to mitigate impairments such as adjacent-channel interference (ACI), co-channel interference (CCI), and multipath. Spatial diversity minimizes the effects of such impairments by using multiple received signals from spatially-distinct antennas to nullify directional interference. This 42 Mb/s diversity QAM receiver, implemented in a 0.6 /spl mu/m CMOS process, includes a 4-channel 1-7 MBaud demodulator with variable channel selection, adaptive antenna combiner, matched filter, adaptive equalizer, and synchronization.
Keywords :
CMOS digital integrated circuits; adaptive equalisers; demodulators; digital radio; digital signal processing chips; diversity reception; interference suppression; quadrature amplitude modulation; radio receivers; synchronisation; 0.6 micron; 4-channel diversity QAM receiver; 42 Mbit/s; CMOS IC; adaptive antenna combiner; adaptive equalizer; broadband wireless communications; demodulator; directional interference; matched filter; spatial diversity; synchronization; variable channel selection; Bandwidth; CMOS process; Demodulation; Directive antennas; Interchannel interference; Quadrature amplitude modulation; Radiofrequency interference; Receiving antennas; Robustness; Wireless communication;
Conference_Titel :
Solid-State Circuits Conference, 1999. Digest of Technical Papers. ISSCC. 1999 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-5126-6
DOI :
10.1109/ISSCC.1999.759281
