Abstract: A transceiver system for RF communications in a wireless network includes a transceiver having first and second receivers and a transmitter. The first receiver and transmitter are connected to first antenna section. The second receiver is switchable between connection to a second antenna section and connection to the first antenna section. In a dual diversity mode, the second receiver is connected to the second antenna section, and the two receivers are tuned to the same RF channel set. Thus, multi-path faded signals in the RF channel set are received at the two antenna sections. In a cross-connected mode, two of the transceivers are used together, with the second receiver in each being connected to the first antenna section. Each transceiver supports one antenna, and the receivers in each transceiver (as well as the transmitters) are respectively tuned to different RF channel sets. Thus, system capacity is doubled in conjunction with diversity reception.

Abstract: In the method of making downlink operational measurements a measurement request from one of a main controller and a first base station is sent to at least a second base station. The measurement request requests the second base station to instruct mobile terminals in communication therewith to make operation measurements of at least one signal transmitted by the first base station. The second base station transmits a measurement instruction to the mobile terminals in communication therewith in response to the measurement request. The measurement instruction instructs the mobile terminals in communication with the second base station to make operational measurements of the signal transmitted from the first base station. Then the second base station receives results of the operational measurements from the mobile terminals in communication therewith. Alternatively or in addition, the second base station makes the operational measurements.

Abstract: In a mobile communication system, independent versions of a signal are transmitted over plural antennas. The antennas are either spatially separated or orthogonally polarized with respect to each other so that the independent versions of the signal are not subjected to correlated fading. Each independent version of the signal is transmitted from a respective antenna a fixed delay after transmission of a previous version of a signal from a different antenna. The fixed delay is at least one information bit of the signal. Received versions of the signal are equalized in an equalizer or RAKE architecture to provide a composite signal. The equalizer has respective sets of equalizer taps that are separated from adjacent sets of equalizer taps by the fixed delay. The RAKE architecture has respective sets of RAKE fingers that are separated from adjacent sets of RAKE fingers by the fixed delay.

Abstract: High speed data transfer from a base station to a mobile terminal is provided using an additional wide band communication channel that supplements the communications provided by the reverse (mobile to base station) and forward (base station to mobile) links used in cellular or PCS communications systems. In one embodiment, the standard forward and reverse links are used as control channels for data transfers over the additional or adjunct forward wide band channel. In another embodiment, the communications carried out over the narrow band forward link channel are sent over the adjunct wide band forward channel thereby eliminating the need for a narrow band forward link channel.

Abstract: An apparatus and method of adaptive sectorization that is amiable to CDMA environments using an antenna configuration and a phase shifter network that can form a variable width beam over which a pilot signal and other downlink signals may be transmitted. The antenna configuration having at least an antenna sub-array with two or more antenna elements. The phase shifter network having a plurality of switches for adjusting beam width by directing signals to be transmitted over one or more of the antenna elements, and phase shifters for shifting phases of the signals to be transmitted over the one or more antenna elements.

Abstract: A wireless architecture is disclosed based on the use of two separate air interfaces on two separate sets of uplinks and downlinks. In particular, the multiple air interface architecture of the invention incorporates a re-radiator that employs two different air interface protocols. One air interface protocol is used for “backhaul” reception and transmission to the serving network base station, and is deployed between the fixed network base station and the re-radiator. This air interface protocol is optimized for transmission over a long distance and for sharing among multiple users. A second air interface protocol is used for local re-radiation between the re-radiator and a served end user device. This second air interface is optimized for very short distances. The reradiator itself is placed at a fixed location allowing it to take advantage of antenna directionality and antenna gain, and also to meet certain requirements regarding fixed terminals.

Abstract: A time slotted system capable of switching between two or more antennas during the guard times of the time slots. Switching between antennas during the guard time of the time slots eliminates any disturbance to the user, since it eliminates any loud noise, or popping that can occur during the switching between antennas. The beamwidth of each of the antennas is narrower than needed to cover a sector of a cell of the system, increasing the size of the cell due to the larger gain of the narrower beamwidth antenna elements. The system also includes a scanning radio for determining the optimal signal amongst the signals received on the antennas, and a switch for coupling the antenna receiving the optimal signal to a receiver system. In one embodiment of the invention the optimal signal is based on the information content of the signal, such as the signal's bit error rate.

Abstract: A valved heat pipe and an adaptive circuit cooling system using it are disclosed. The valved heat pipe includes a sealed tube, liquid in the tube, and at least one valve in the tube. This valve operates as a function of temperature to selectively obstruct circulation of the liquid from one end of the tube to the other. The adaptive cooling system includes heat generating equipment, e.g., electronic circuitry such as radio frequency transmitters and/or recievers, a heat sink and such a valved heat pipe that thermally connects the circuitry to the heat sink.

Abstract: An antenna array system includes a first array for operating in a transmit mode and a receive mode and a second array spaced apart for operating in the receive mode. A receiver adjusts a receive radiation pattern in the receive mode and provides a control signal for a transmit radiation pattern of the transmit mode.

Abstract: In a mobile communication system, independent versions of a signal are transmitted over plural antennas. The antennas are either spatially separated or orthogonally polarized with respect to each other so that the independent versions of the signal are not subjected to correlated fading. Each independent version of the signal is transmitted from a respective antenna a fixed delay after transmission of a previous version of a signal from a different antenna. The fixed delay is at least one information bit of the signal. Received versions of the signal are equalized in an equalizer or RAKE architecture to provide a composite signal. The equalizer has respective sets of equalizer taps that are separated from adjacent sets of equalizer taps by the fixed delay. The RAKE architecture has respective sets of RAKE fingers that are separated from adjacent sets of RAKE fingers by the fixed delay.

Abstract: In a mobile communication system, independent versions of a signal are transmitted over plural antennas. The antennas are either spatially separated or orthogonally polarized with respect to each other so that the independent versions of the signal are not subjected to correlated fading. Each independent version of the signal is transmitted from a respective antenna a fixed delay after transmission of a previous version of a signal from a different antenna. The fixed delay is at least one information bit of the signal. Received versions of the signal are equalized in an equalizer or RAKE architecture to provide a composite signal. The equalizer has respective sets of equalizer taps that are separated from adjacent sets of equalizer taps by the fixed delay. The RAKE architecture has respective sets of RAKE fingers that are separated from adjacent sets of RAKE fingers by the fixed delay.

Abstract: A wireless telecommunications system base station architecture is disclosed that supports receive diversity, sectorization, and radio pooling without the need for a sniffer radio or a switching matrix between the radios and the receive antennas.