Single frequency broadcast system performance in a power-controlled CDMA cellular network
Wai-Tat Wong, Elvino Silveira Sousa · 2002
This paper presents interference analysis of a single frequency broadcast system (SFBS) in a power-controlled CDMA cellular network which operates in a low frequency band (LFB) for the reverse link and a high frequency band (HFB) for the forward link. Common to all forms of power control is the equalization of received power or received signal-to-interference ratio (SIR) at both the base station (BS) and portable (PT) disregarding the induced power distribution through the rest of the communication cell. As a result, an SFBS which operates in either the LFB or the HFB and is located somewhere inside the cell, may not benefit from power control, and is therefore susceptible to the "near-far" effects. Our emphasis is on dealing with the interference received at an SFBS receiver and on demonstrating the susceptibility of the SFBS receiver to the "near-far" problem in the LFB and the HFB. Both intracell and intercell interference scenarios are considered, with distance dependent and lognormal shadowing models adopted for propagation path loss. The end products are the cumulative distribution functions (CDFs) of the interference power received at the SFBS receiver in the LFB and the HFB for a PT uniformly distributed in a circular cell. These expressions are analytic for the distance dependent propagation model but require numerical integration when the lognormal shadowing model is introduced, and contribute toward the evaluation of outage probabilities of the SFBS receiver under various propagation conditions and location considerations.