Capacity and outage performance of regional signal combining using distributed antennas

For cellular systems with base stations (BS's) equipped with distributed antennas, various cooperative signal transmission strategies can be employed. In this paper, we analyze the trade-off between the transmission capacity and the outage probability when downlink signals from two geographically separated antennas are combined. It is demonstrated a significant reduction in the outage probability can be achieved while simultaneously improving the capacity, when signal combining is selectively performed based on the carrier-to-interference ratio (CIR) measurement at a given mobile station (MS). Experimental results show the outage (CIR less than 0 dB) probability reduces by 54.1% with the capacity increase of 7.4% for the fading channel condition.

[1]  Sonia Aïssa,et al.  Closed-form expressions for the outage and ergodic Shannon capacity of MIMO MRC systems , 2005, IEEE Transactions on Communications.

[2]  Harish Viswanathan,et al.  Performance of cellular networks with relays and centralized scheduling , 2005, IEEE Transactions on Wireless Communications.

[3]  Gregory W. Wornell,et al.  Cooperative diversity in wireless networks: Efficient protocols and outage behavior , 2004, IEEE Transactions on Information Theory.

[4]  Dongfang Liu,et al.  Performance analysis of macroscopic diversity combining of MIMO signals in mobile communications , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[5]  Khaled Ben Letaief,et al.  Multiuser adaptive subcarrier-and-bit allocation with adaptive cell selection for OFDM systems , 2004, IEEE Transactions on Wireless Communications.

[6]  Gerhard Fettweis,et al.  Relay-based deployment concepts for wireless and mobile broadband radio , 2004, IEEE Communications Magazine.

[7]  Michael Gastpar,et al.  Cooperative strategies and capacity theorems for relay networks , 2005, IEEE Transactions on Information Theory.

[8]  Patrick Mitran,et al.  Space-time diversity enhancements using collaborative communications , 2005, IEEE Transactions on Information Theory.

[9]  Halim Yanikomeroglu,et al.  Relayer selection strategies in cellular networks with peer-to-peer relaying , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).