Abstract: A method for automatically configuring a wireless repeater in a cellular communication system includes the steps of selecting a repeater configuration associated with at least one predetermined cell, identifying a specific repeater installed in the predetermined cell, and providing the repeater configuration to the specific repeater using a wireless transmission from a remote control facility. An apparatus includes structures for the automatic configuration of a wireless repeater in a cellular communication system.

Abstract: A wireless system architecture whereby high efficiency broadband transceiver systems can be deployed at an initial build out stage of the system in a cost-efficient manner. A home base station location is identified within each cluster of cells and rather than deploy a complete suite of base station equipment at each of the cells in the cluster, inexpensive translator units are located in the outlying cells serviced by the home base station in which low traffic density is expected. The translators are connected to directional antennas arranged to point back to the home base station site. The translators are deployed in such a way which meshes with the eventually intended frequency reuse for the entire cluster of cells. The translator to base station radio links operate in-band, that is, within the frequencies assigned to the service provider.

Abstract: In this approach to implementing a wireless communication system, in band translator components are located in the center of remote cells which would normally contain a base transceiver system (BTS). Selective diversity processing is implemented in the translators by providing for at least two spatially separated receive antennas and two receive path circuits in the up link direction. A diversity circuit is time synchronized to the downlink signal to provide for proper detection and selection of the appropriate signal to be forwarded to a centralized BTS. As a result, a separate diversity path need not be maintained for the remainder of each backhaul link, and radio frequency components such as a second upconverter, synthesizer and power amplifier associated with the range extender can be eliminated.

Abstract: A distortion correction technique for use with a high power amplifier (HPA) in a multi-carrier radio signaling system such as a cellular base station. Distortion correction is implemented by making use of a broadband digital composite signal input to the high power amplifier as a reference signal in a form of intermediate frequency (IF) distortion correction circuit. A multichannel synthesizer provides the broadband composite signal to a broadband digital radio which in turn provides an input to the (HPA). A portion of the output signal from the HPA is fed back through a radio frequency (RF) and intermediate frequency (IF) down-conversion stage that uses the same IF and RF local oscillators that were used to generate the input signal to the HPA. This feedback signal is fed to a predistortion processor together with a version of the composite digital signal.

Abstract: A cellular-telephone-system base station (10) employs a digital band-exclusion filter (30) to detect a supervisory tone, but the filter's record length is shorter than that dictated by the necessary resolution and produces output values at a frequency much lower than the frequency of the supervisory tone. A second filter (32) receives the output, operating on a record whose time duration is long enough to achieve the necessary frequency resolution. The second filter's coefficients are chosen to match the frequency of the signal to which the previous filter's subsampling translates the frequency of the supervisory tone. In this way, the supervisory tone can be detected with the necessary resolution but at storage computational costs less than the input sample rate and required frequency resolution would seem to require.

Abstract: In a cellular-communications base station (10), an attenuation circuit 22 sets different power levels for different ones of the forward communications channels by which the base station transmits to the mobile units (12) that it services. From the reverse-channel transmit power that a reverse-channel-power circuit 52 derives from the associated reverse-channel power that the base station receives, a forward power circuit (58) infers the level of forward-channel transmit power that will result in the mobile unit's receipt of the requisite forward-channel power. In this way, the base station (10) avoids the need to transmit full power into all of the forward channels even if it is operating in accordance with a protocol that does not explicitly inform it of the forward-channel power that the mobile unit (12) is receiving.

Abstract: A cellular-telephone base station (12) services a cell (14) that encompasses cells (16 and 18) serviced by other base stations (20 and 22). The base station (12) associated with the overlaid cell (14) communicates with mobile stations within its cell (14) by way of code-division multiple-access (CDMA) channels in a first frequency band. The CDMA channels by which the other base stations (20 and 22) communicate with mobile stations in their respective cells (16 and 18) occupy a second frequency band. Although the two smaller-cell base stations (20 and 22) employ the same frequency band, they are not contiguous, and they are separated enough so that they interfere only negligibly. Consequently, their channel capacities exceed those of conventionally configured CDMA cells of the same bandwidth.

Abstract: A frequency allocation technique for a wireless system which employs remote subscriber Field Access Units (FAUs) that use omni-directional antennas in an inner region of a cell, and directional antennas in an outer region of the cell. Different frequency subsets are used for the inner and outer cell regions and FAUs located in the inner regions of homologous cells maintain separation from one another by limiting their operating power to a level needed to complete the radio link from the base station. A receiver portion of the base station has the capability to determine received signal power for each channel within the bandwidth being served. This provides the basic input for a channel selection algorithm which determines the quietest channel from among those channels not in use. A further constraint on the frequency allocation process is that a minimum number of channels always remain unused.

Abstract: The Spurious-Free Dynamic Range (SFDR) in a broadband digital radio transceiver is typically limited by the required digital-to-analog converter which introduces differential nonlinearities that cause harmonic distortion in intermodulation products. The invention was a digital-to-analog conversion subsystem that coherently combines the outputs of two or more digital-to-analog converters that have different internal architectures. As a result, spurious responses are not correlated with one another while desired signal components do add coherently. The spurious responses therefore cancel in the combined output while the desired signal components add in phase. The overall result is to increase spurious-free dynamic range at the radio transmitter output.

Abstract: A technique which enables the use of a low cost linear power amplifier to generate a wideband composite signal, such as in cellular mobile telephone (CMT), personal communication system (PCS), or other multi-channel wireless systems. A composite signal is generated by a wideband digital combiner as a frequency multiplexed combination of many narrowband modulated digital carrier signals. The technique involves introducing predetermined phase shifts into each of the digital channel signals after a baseband modulation step. The wideband composite signal thus exhibits a reduced peak-to-average signal power, despite the fact that the phases of the digital carrier signals cannot be directly controlled. This permits the use of a power amplifier, which may have a much smaller peak-to-average rating.

Abstract: A radio-frequency (RF) distribution system carriers multi-carrier RF signals having frequencies above 500 Mb over existing electric power wiring between a transceiver and one or more antennas. The transceiver and antennas can be connected to the power wiring, disconnected from the power wiring, relocated, and reconnected to the power wiring without installing conventional transmission lines.

Abstract: A wireless communication system includes a plurality of wideband base stations and a cluster controller that dynamically controls channel allocations among the base stations. When a base station can not service a radio telephone terminal within its cell site, the base station polls the channels and sends a request for a channel to the controller, listing in the request the channels the station determines at the cell site to be inactive. The controller consults a load statistics table to determine if a first listed channel is free over the system. If so, the controller allocates the channel to the base station, if not the controller searches the table for a free channel. The controller may also include channel usage rates in the table. These rates indicate for a predetermined period of time for each base station the rate at which the base station assigns channels to the terminals and the number of channel in use simultaneously.