Interference management for soft handoff and broadcast services in a wireless frequency hopping communication system

摘要

Techniques are provided to manage interference for soft handoff and broadcast services in a wireless frequency hopping communication system (e.g., an OFDMA system). These techniques may be used for the forward and reverse links. In a first scheme, an FH function f_sho(r,T) is used for soft-handoff users, an FH function f_si(k,T) is used for users not in soft handoff in each sector s_i, and the FH function f_si(k,T) is modified to be orthogonal to the FH function f_sho(r,T) if and when necessary. In a second scheme, the FH function f_sho(r,T) used for soft-handoff users is defined to be orthogonal to or have low correlation with the FH function f_si(k,T) used for users not in soft handoff in each sector s_i, so that modification of the FH function f_si(k,T) is not needed. The FH function f_si(k,T) for each sector may be defined to be pseudo-random with respect to the FH functions f_si(k,T) for other sectors.