Abstract: In a wireless CDMA system, responsive to receiving a request for a group call for a given talk group, a controller (12) allocates an outbound group call channel to the group (202), and uniquely assigned inbound and outbound channels to each subscriber unit in the group (203). Each subscriber unit in the group receives an identification of its uniquely assigned inbound and outbound channels (303). Via its uniquely assigned outbound channel, a given subscriber unit receives inbound control information (304) from the controller. By providing each subscriber unit in the group with a uniquely assigned outbound channel, in addition to the outbound group call channel, control information is readily provided to multiple subscriber units, thereby facilitating the establishment of group calls in CDMA systems.

Abstract: A radio subscriber unit (102) has a diversity receiver apparatus (106) including a first antenna (114) and a second antenna (116). A first representation (158) and a second representation (160) of a composite radio frequency (RF) signal are received from the first antenna (114) and the second antenna (116), respectively. The composite radio frequency (RF) signal includes a desired RF signal (156) and interfering signals (166). The desired RF signal (156) includes at least one coded pilot signal (Ec). A ratio (Ec/Io) (142) of the at least one coded pilot signal (Ec) to an estimate of the composite RF signal (Io) is determined responsive to receiving at least one of the first representation of the composite RF signal (158) and the second representation of the composite RF signal (160). A selected state of the first antenna(114) and the second antenna (116) is controlled responsive to at least one of the ratio (Ec/Io) (142) and an integrated received signal strength indication (.intg.

Abstract: A radio subscriber unit (102) comprises a controller (108) and a switched antenna diversity receiver apparatus (106) including a first antenna (114), a second antenna (116) and a receiver (126). The first antenna (114) is adapted to receive a first representation (158) of a radio frequency (RF) signal (156). The second antenna (116) is adapted to receive a second representation (160) of the RF signal (156). The receiver (126), selectively coupled to the first antenna (114) and the second antenna (116), generates a received signal (153) responsive to receiving at least one of the first representation (158) of the RF signal (156) from the first antenna (114) and the second representation (160) of the RF signal (156) from the second antenna (116). The controller (108), coupled to the receiver (126), selectively couples to the receiver (126), responsive to the received signal (153), one of: only the first antenna (114), only the second antenna (116) and both the first antenna (114) and the second antenna (116).