Title :
Adaptive channel equalization for TDMA digital cellular communications using antenna arrays
Author :
Naguib, Ayman F. ; Khalaj, Babak ; Paulraj, Arogyaswami ; Kailath, Thomas
Author_Institution :
Inf. Syst. Lab., Stanford Univ., CA, USA
Abstract :
Mobile radio channels can be generally characterized as a fading multipath channel with multipath spread delay that ranges from a few microseconds (μs) up to as much as 15 μs. Such large delays result in intersymbol interference which raises the need for equalization. A semi-blind maximum likelihood sequence estimation (MLSE) with an antenna array is studied as an adaptive equalization method for time division multiple access (TDMA) digital cellular systems. The MLSE is implemented using a Viterbi algorithm (VA). An antenna array is used to utilize both temporal and spatial structure in the received signal to provide the VA with the estimate of the channel impulse response necessary for it to perform MLSE
Keywords :
adaptive equalisers; antenna arrays; array signal processing; cellular radio; digital radio; estimation theory; fading; intersymbol interference; land mobile radio; maximum likelihood estimation; multipath channels; time division multiple access; MLSE; TDMA; Viterbi algorithm; adaptive channel equalization; antenna arrays; channel impulse response; digital cellular communications; fading multipath channel; intersymbol interference; maximum likelihood sequence estimation; mobile radio channels; multipath spread delay; received signal; spatial structure; temporal structure; time division multiple access; Adaptive arrays; Adaptive equalizers; Antenna arrays; Delay; Fading; Intersymbol interference; Land mobile radio; Maximum likelihood estimation; Multipath channels; Time division multiple access;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.389866
