Title :
Applications of space-time block codes and interference suppression for high capacity and high data rate wireless systems
Author :
Naguib, Ayman F. ; Seshadri, Nambi ; Calderbank, A.R.
Author_Institution :
AT&T Labs-Res., Florham Park, NJ, USA
Abstract :
This paper presents a combined interference suppression and ML decoding scheme for space-time block codes that can effectively suppress interference from other co-channel users while providing each user with a diversity benefit. We consider a multiuser environment with K synchronous co-channel users, each is equipped with N transmit antennas and uses the space-time block coding. By exploiting the temporal and spatial structure of these codes, we develop a minimum mean-squared error (MMSE) interference suppression technique. Assuming that the receiver uses M/spl ges/K receive antennas, these technique will perfectly suppress the interference from the K-1 co-channel space-time users and provide a diversity order of N/spl times/(M-K+1) to each of the K users. Moreover, this MMSE solution tends itself to an adaptive implementation and does not require any explicit knowledge about the interference. In conjunction with this interference suppression technique, we show how space-time block codes can be used to increasing the capacity and/or data rate of wireless communication systems.
Keywords :
block codes; cellular radio; channel capacity; cochannel interference; diversity reception; interference suppression; least mean squares methods; maximum likelihood decoding; receiving antennas; ML decoding; MMSE; capacity; cellular radio; data rate; diversity order; high capacity systems; high data rate wireless systems; interference suppression; minimum mean-squared error; multiuser environment; receive antennas; receiver; space-time block codes; spatial structure; synchronous co-channel users; temporal structure; transmit antennas; Block codes; Delay; Diversity reception; Fading; Interference suppression; Receiving antennas; Signal to noise ratio; Transmitters; Transmitting antennas; Wireless communication;
Conference_Titel :
Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5148-7
DOI :
10.1109/ACSSC.1998.751635