In this paper, we present a new hierarchical cell system with an underlaid TDD/CDMA microcell and overlaying FDD/CDMA macrocells. With an objective to exploit the underutilized FDD uplink capacity due to traffic asymmetry, the TDD/CDMA mircocell is operated within the uplink frequency band of the overlaying FDD/CDMA macrocells. By jointly applying the proposed antenna arrays at the cell site and a new power ratio adjustment technique, we evaluate the outage probabilities of the macrocell and the microcell. From the simulation results, we demonstrate that the full capacity of the TDD/CDMA mircocell can be obtained without degrading the performance of FDD/CDMA marcocells.
|Number of pages||5|
|State||Published - 1 Dec 2002|
|Event||GLOBECOM'02 - IEEE Global Telecommunications Conference - Taipei, Taiwan|
Duration: 17 Nov 2002 → 21 Nov 2002
|Conference||GLOBECOM'02 - IEEE Global Telecommunications Conference|
|Period||17/11/02 → 21/11/02|