A plurality of methods for achieving the soft or softer handoff process such that the performance of a system is improved. A first method is based on delaying the softer handoff process. A second method is based on reducing the power of transmissions from the sector having the weakest signal strength. A third method is based on eliminating transmissions from the sector having the weakest signal strength. A fourth method adds a new base station or sector only when the mobile unit is in need of additional power to operate properly. In all four methods, reverse link demodulation in each sector may continue with or without the transmission of the forward link. In all four methods the operation could be based on the signal strength of the reverse link signal or the forward link. It is also possible to combine two or more of these methods to create a hybrid method.
CROSS REFERENCE
This application is a continuation application of application Ser. No. 08/316,155, filed Sep. 30, 1994, now U.S. Pat. No. 6,157,668, filed Dec. 5, 2000, entitled "Method and Apparatus for Reducing the Average Transmit Power of a Base Station which is a Continuation-In-Part application of pending prior application Ser. No. 08/144,901 filed on Oct. 28, 1993, now abandoned entitled "METHOD AND APPARATUS FOR REDUCING THE AVERAGE TRANSMIT POWER OF A SECTORIZED BASE STATION."
The present invention relates to a receiver device and method of receiving a radio signal, wherein radio signals are received through at least two respective different receiving paths, combined and processed in a common multi-carrier path. In particular, a carrier of the common multi-carrier path is allocated to each channel signal provided in the combined signals. Signals received from different antenna elements, e.g. sector antennas, can thus be combined together and fed to just one multi-carrier receiver, so that hardware requirements are significantly reduced.
Apparatus, and associated method, for facilitating reverse link scheduling in a CDMA 2000 communication system (FIG. 1, 10) that provides for high data rate communication services, such as 1xEV-DV communication services. Power control bits (FIG. 1, 46) used to perform power control on the reverse link are punctured with rate grant control bits and HARQ indications. A power control bit puncturer (FIG. 1, 48) punctures the power control bits with the rate grant control bits and HARQ indications. Physical layer signaling is thereby provided without the need to define additional control channels operations.
Measurement packets periodically transmitted from a terminal are received by an access point, a reception level value is detected, in the case of the Measurement packet from the terminal which has been notified of connection permission, the reception level value is registered into a management table (association table). In the case of the Measurement packet from the terminal which is not notified of the connection permission, the reception level value is notified to another access point which has been notified of the connection permission and the reception level value from another access point is further registered into the management table. The own reception level value registered in the management table is compared with the reception level value of another access point. If the reception level value of another access point exceeds the own reception level value, the connection permission to the terminal is cancelled and the switching to the next access point is notified. Even if different channels have been set in the adjacent access points, the roaming for switching the connection of the terminal to the access point at which optimum communication quality is obtained can be executed.
An OFDM demodulation circuit capable of initiating a demodulation process within a short period of time after the reception of a signal and terminating the demodulation early if it has been initiated erroneously, and an OFDM reception apparatus employing the OFDM demodulation circuit. If a threshold value Sth2 in peak detector 122 is not exceeded within a predetermined time T following the output of a symbol timing signal from peak detector 121, namely if a continuation timing signal is not supplied from peak detector 122 to a demodulation process terminating circuit 162 before demodulation process terminating circuit 162 counts predetermined time T (step S115), demodulation process terminating circuit 162, determining that the position at which the demodulation process has been started was wrong, terminates the currently executed demodulation process soon after the completion of the counting of predetermined time T and returns to a received-signal awaiting state (step S111).
An apparatus and method for canceling pilot signals from neighbor base stations is disclosed. The present invention cancels unnecessary pilot signals transmitted from the neighbor base stations by detecting, analyzing a PN signal in a pilot signal of each base station, generating estimated interference signal according to analyzed information from the detected PN signal and subtracting estimated interference signal from the received signal. Therefore, the present invention increases a bandwidth of downlink transmission channel and improves the demodulator to be operatable in low signal-to-noise ratio (E.sub.b /N.sub.o).
